Family in a Bunker

Year 2053.

All characters involved in sexual activity are 18 or older.

My family were preppers for years. Canned goods, escape plans, guns, knives, the works. When my sister and I turned twelve, our dad took us out to the range to learn how to handle a firearm. It had been quite some time since then, my sister was 19 and I was 18, and we'd gotten quite skilled at firing, cleaning, and maintaining our weapons.

All this doomsday prepping stuff was just a hobby that none of us besides Dad took seriously. WWIII had been going on for a while at this point, but we got used to the status quo and didn't expect anything drastic. But then the bombs fell. Sirens blared and people screamed outside. We looked out our window and could see the missiles streaking through the sky, on their way to destroy cities far from here. People outside scrambled in a panic.

"This is what we trained for," Dad said stoically. "Everybody head downstairs."

Dad had a bunker installed and attached to our basement. It was where we stored the canned goods and many other apocalypse supplies that I never seriously thought we'd need. Gunshots fired outside, and my sister and I immediately headed downstairs. Mom and Dad were shortly behind us with Dad being the last one through. He shut the hatch of the bunker behind him, and locked it.

"So," my sister, Anne, said. "This is really it."

"This is really it," Dad confirmed. "Everybody you knew, everybody you went to school with, your friends, your crush or your girlfriend, all might as well be dead by now."

Anne was stunned speechless. The faces of all my friends flashed before my eyes. I had to accept that all them were gone, or might as well be by now. A handful of them were preppers as far as I knew, though even among the preppers, they didn't take it seriously. Then again, neither did I, and I'm alive.

"Kurt made it," Anne said.

"What?"

"Kurt, my gay friend," Anne said. "He reserved a spot at one of those fallout shelters. He might be alive."

"Good for him," Dad said. "You might not ever see him again, though."

"It's enough to know he's alive."

Dad nodded. "Well, I know we've trained here, but this is the real deal. So a brief tour. This is the main entrance of course. The only way in or out. Our batteries have enough power to last 200 years. As long as that is running, the air and water should recycle and filter. A Geiger counter as well as other sensors and even a camera to tell us how safe it is outside is also here. It's opened up right now, but if you notice, the immediate entrance can be shut and become a decontamination chamber if you ever feel the need to leave and come back. Along the wall there are weapon lockers, hazmat suits, first aid, and other stuff like that."

Dad pointed to a console near the hatch. "This is for communications. You can scan the radio waves for other survivors. Anne, you might even find Kurt."

Dad paused and raised a finger for emphasis. "Now, don't ever, EVER give away our location. To anybody. Not only will desperate apocalypse conditions make everybody desperate and irrational, but you don't know who else is listening."

Anne and I nodded. Dad took us down the short hall and pointed to his right. "Kitchen is here. This is where we stocked our canned goods. Now, we do have a food synthesizer, but I'm sure you remember the barely passable slime it makes. As long as we have our canned goods, then we can avoid the synthesizer. I don't know how long the radiation will remain outside; we may eventually have to resort to using it."

My stomach turned at the thought of it. During one of Dad's drills, we stayed in the bunker and used the food synthesizer for a month. Worst month ever. All it produced was tasteless slime that nobody wanted.

Dad pointed to another room. "This is where your mom and I will sleep, and that room over there is for you two."

I remember sharing the space with Anne during drills. It was unpleasantly cramped. Somehow complaining about sharing a room seemed a little selfish with everybody outside dying.

"Here is what could best be described as the living room." There was a couch and a TV in there. As we knew from previous drills, the TV had movies already downloaded onto it. Just because it's the end of the world doesn't mean no entertainment. It also had a built in gaming system.

"And here is the bathroom," Dad said. "Water will be filtered, purified, and recycled. Solid waste too, which is another reason I'd like to avoid using that food synthesizer."

Only Mom chuckled at that joke.

"Weapon lockers are by the entrance, I suggest you two each take a weapon to your room in case someone gets through the hatch," Dad said. "I don't think anybody will make it through, but better safe than sorry."

"Right," Anne and I said in unison. We both chose a rifle and a couple magazines of ammunition and took them to our room. The room had bunk beds, and I got the bottom bunk. We set our weapons on a side of the room. It had the basic bedroom furniture. There was a nightstand and a burrow. There was even a mirror. Our emergency clothes were kept in here. About enough to last a week before doing laundry. Since these were the clothes we'd only wear during the end of the world that was likely never to come, we left our least favorite sets down here. Now they were the only clothes we could wear. Potentially forever. At least nobody would see us in these.

After setting my rifle down, I went to lie on my bed and stare at the mattress over me. Anne climbed into hers as well, and I watched it sink from her weight.

"I can't believe it's all just gone," Anne said.

"Right," I replied. "Maybe we won't be down here long. Maybe they won't bomb us as heavily."

"We live a stone's throw from the capital. We're fucked."

"Right." I thought about what Anne said about Kurt. "Anybody else you know of that had a fallout shelter spot?"

There was silence for a full three seconds before Anne spoke again. "Maybe one or two. They'd still have to make it to the shelter within time, though."

I nodded without fully realizing that she couldn't see me. "I think some of the seniors from school had spots. Like the football team and the cheerleaders."

Anne chuckled. "Just what humanity needs to reproduce."

I laughed too. "Wouldn't it be funny if they got sent to separate shelters, though?"

Anne laughed harder. "Right, and then like, oops, guess we have to settle for gay sex. Man, that'd be whack."

"Totes whack." It's the 2050s. This is how young people talk. "Some of my friends were preppers. They might've made it."

"Yeah, some of mine were preppers too. Most weren't though."

"That's right," I said grimly. "Most weren't."

***

Life in the bunker took some getting used to. After the initial shock, the boredom quickly set in. Fortunately, I happened to have had my handheld in my pocket when we rushed to the bunker. It was like an iPhone, but with 30 years advanced technology. Internet was down of course, but I was able to play the games on it that I had already downloaded, and I read some ebooks I had been putting off. And of course, porn.

It had been three days when I got the urge to watch porn. I usually watch more often than that, but it had been a stressful three days, and sex was not on my mind. We still had a clock and calendar, and were trying to maintain more or less a normal schedule. The lights in our room were out, and I waited until I thought Anne was asleep. I went to my gallery and swiped through some nudes I'd saved. My cock stiffened in my boxers, and I pulled them down to jack off.

I tried to keep my movements subtle so as not to shake the bunk too much and alert Anne. I made sure the device was on mute before I played some videos. This blonde with huge tits was stripping her clothes off and I jerked myself faster. A couple times, I was so excited that I knew the bunks had moved a bit, but I was too horny to care anymore. I finished into a sock.

As my breathing returned to normal, I noticed Anne's breathing was fast. A soft feminine moan escaped her lips, and a jolt went through me as I realized she might not be asleep. More suppressed moans sounded in the darkness, and I realized that not only was she was not asleep, she was masturbating, just as I was! I listened to her for several more minutes, and as I did, my cock began stiffening again.

I had never thought of my sister this way before, but here she was masturbating. During drills, we had simply abstained. It was easier knowing we'd only be down a couple weeks. But now it was three days going on for the rest of our lives possibly.

The more I listened, the more details I could hear. I heard her panting and soft moans that were getting every so slightly louder. Her fingers moved over her dripping wet pussy. It sounded like she was mostly rubbing her clit, but occasionally she was dipping inside. I began to visualize and imagine Anne's pussy, and I got rock hard. This couldn't be! She was my sister!

Of course, I'd deny attraction to my sister, but she was attractive by any objective measure. Her breasts were moderate size, roughly a C or D cup. Something like that; I wasn't exactly raiding my sister's underwear drawer, and girls hardly ever wore bras anymore anyway. She had a thick ass and firm body. Blonde hair was medium length.

I didn't hear any fabric moving, so she must've taken her panties off. She might even be naked, and from her sounds, she'd be too horny to notice me. Temptation got the better of me, and I slowly got up from the bed to peer over the side. Her beautiful body was exposed on the top bunk, with her right hand fingering her pussy. Her hand was in the way, so I didn't get a good look between her legs. Her tits were open to my eyes though as her shirt was pulled up to expose them. The beautiful flesh was exposed to my eyes for the first time, and I feasted my eyes on them. Her left hand was pulling at her nipples one at a time, and they looked rock hard. The darkness of the room made it difficult to see all details, but I saw enough to see they were gorgeous tits.

Her eyes were tightly closed and her mouth was open as she panted and moaned. She went at herself faster and faster as she seemed to near her climax. I was prepared to duck back into my bunk at any moment, but I couldn't pull my eyes away. Her breasts jiggled from her movement and she let a louder moan slip out. She writhed on the bed and her hips bucked. Through gritted teeth, she let herself moan a little louder as her muscles tensed. I realized I was watching my sister cum, and I ducked back into my bed.

Sheets rustled and the weight on the top bunk shifted as Anne hopped down. I peeked open one eye and saw her panty clad ass in the darkness as she headed for the bathroom to wash her hands. Her ass muscles tensed as she walked away, and I let myself fall asleep once she was too far to make out anymore details.

The next morning, or what passes for mornings anymore, neither of us let on about what happened the previous night. We continued on our morning routines as if nothing happened. There was little to talk about. Radio comms were silent. To pass the time, I picked a movie to watch on the living room TV, which had just about every movie ever made already saved onto it. As I watched Spider-Man 2, made in 2051, I realized that this was the last one. The sequel would never get made. The actors, and everybody onscreen were all probably dead now.

Anne came over and sat next to me to watch it. "Watching this makes it almost feel like things are normal."

"They're not normal," I said. "This story will never be finished."

"Buzzkill." As Anne moved in her seat, I couldn't help glancing over and undressing her with my eyes. Memories of what she looked like last night while masturbating were fresh in my memory still. To my surprise, she was moving in her seat to scoot closer to me. She was so close I could feel her body heat, and I could swear she glanced down at my crotch for a second. "Just enjoy the movie as is. Don't worry about the sequels that won't exist."

"Good thinking." We watched more of the movie together, and Anne somehow got closer as we watched. My arm hairs now touched her smooth skin. On a whim, I brought my arm up and rested it on the top of the couch. She accepted this implicit invite and snuggled closer. I brought my hand down to hold her, resting my palm on her bicep with my fingertips just barely grazing her breast.

Despite it being my sister, holding Anne like this simply felt right. My heart was hammering and my cock was throbbing, especially when she rested her arm on my thigh. She brushed it, seemingly on accident, but said nothing about me being hard, though I did notice her inhale sharply.

In the movie, it was time for a sex scene. It was mild by today's standards, but people my grandfather's age was still shocked by it. Spider-Man pealed off Mary Jane's clothes to expose her huge tits. They jiggled as she leaned back and let him take her panties off to show her naturally red bush. He undid a flap in his costume to release his penis before he climbed over her. Mary Jane's breasts bounced and she moaned as he fucked her.

Watching this made my cock completely hard again. It hard started to settle as I got used to Anne's closeness, but the sex scene brought it back. As it stiffened, it nudged Anne's hand. Feeling her hand got me more excited, and my organ pushed under the fabric and her hand. Her fingers moved to grip me before she seemed to realize what happened.

"Oh," Anne said. "Enjoying this scene, are you?"

I stuttered for a second before Anne shushed me.

"It's natural," she said. "I like this scene too, it's just not as obvious on me."

Anne looked down before speaking up again. "Oh wait, yes it is. See?"

Anne straightened and pointed to her hard nipples poking through her shirt. As usual, she didn't wear a bra and I saw every natural bump in her nips. I took my time staring at her tits, as it was one of the few times I had an invite, before speaking up. "So, you like girls?"

"I mean, I'm not opposed to girls. Mary Jane is hot. But the way Spider-Man fucks her in this scene is pretty hot too. He's wearing his suit and she doesn't know who that is. That could be anyone under that suit. She doesn't find out until later it's her friend, who she saw as a brother earlier."

"That is hot." It was getting difficult to fight these feelings for my sister. On one hand, it had only been three days. We'd been together during drills before for longer lengths of time. But we always knew drills would end. This wouldn't. Anne was the only girl besides Mom. Possibly forever.

"Isn't it?!"

We watched Spider-Man pound Mary Jane for several seconds. His mask got rolled up above his mouth and they made out. Eventually the scene ended, but my body did not have a chance to calm down before Anne's hand drifted to my hardened cock. It was slow enough that she'd have plausible deniability over accidental touch. Her pinky finger rested on the head of my cock over my jeans. Once again, I was throbbing and wanting to escape these pants. In response, I let my fingers move on her breast until they rested on her nipple. The shirt fabric was thin, and I could feel just about all the details. Slowly, I moved my pinky across her smooth breast and felt exactly where her stiffened areola began. A very delicate moan like what I heard last night escaped her throat and she rubbed the tip of my penis.

We turned away from the movie to look each other in the eyes. Anne moved her hand to more obviously grab my erection through my jeans. "I saw it last night."

"What?"

"I watched you jack off. You were too busy watching your porn to notice me leaning over the side, and I saw you working this hot dick."

"I watched you too." My fingers wrapped around her breast and squeezed the soft flesh. "I saw your sexy tits while you rubbed your pussy."

Anne moaned. "Did it make you go a second time?"

"Almost," I said. "I didn't want to get caught."

"When I saw your dick, I realized that yours is the only dick around, except for Dad's," Anne said. "And that's not going to change for a long time."

"So only because I'm literally the last man on earth for you?"

"Well," Anne said as she rubbed my dick more. "It is also a nice dick."

"You have really nice tits." I massaged Anne's breast over her and she moaned.

"Let's do this." Anne moved as if to kiss me. Common sense stopped me just before our lips made contact. "Mom and Dad are still awake and could come in at any time."

Anne paused for a second, as if she almost considered kissing anyway. Then she sighed. "You're right."

Despite agreeing, Anne continued to rub my cock, and I continued to rub her breast. If Anne didn't stop soon, I was going to cum in my pants right there. I suppressed a groan as Anne was getting me closer to climax. She must've noticed, and she pulled the zipper of my pants down. I stopped her as she reached in.

"Relax, I just want to touch it," Anne said. "I won't just whip it out for Mom and Dad to see."

Anne's cool and nimble fingers reached in through my fly. They made their way through my pubes and felt my shaft. She softly rubbed my hard cock, and I glanced behind us. Dad passed by in the hallway without even glancing in our direction. No idea where Mom was. Anne used one hand to rub the bare skin at the base of my cock, and the other to massage my tip. I suppressed more of my groans and she rubbed harder and faster. I continued to stroke her tits before reaching down between her legs. She opened them to invite my hand in, and I rubbed her privacy through her pants.

"Reach in," Anne said. "Feel how wet I am."

Anne's pants were tight, but also stretchy. They yielded easily to my hand, and I felt her short pubic stubble. I reached down for her clit and then her entrance. She was soaking wet and my finger popped into her with no resistance. Another moan escaped her throat, and she seemed a lot worse at suppressing hers than I was. Her hands left my cock and went to my face to bring mine to hers and our lips pressed together. My tongue entered her mouth and she started to moan more before breaking the kiss. "We don't have to stop, but we have to get out of the living room."

I turned the movie off. "Let's go to our room."

Anne nodded and we went down the hall to our room. I shut the door behind me and locked it. Anne had already started taking off her clothes and she was topless by the time I saw her. Now her tits were visible in full light, and my mouth water at the sight of her red nipples. I took off my clothes as she stripped the rest of the way. Her pussy was shaved completely and I admired it for a second before guiding her to my bunk.

Anne lied on my bunk and spread her legs to welcome me in. I guided my cock to her hungry pussy. It slid in with ease, and her wet warmth engulfed my feeling. Anne wrapped her arms and legs around me as I pushed into her. We tried to be as silent as we could, but apparently Anne was not the silent type. Moans only got louder as I fucked her. When I was pounding her, she was moaning like a pornstar.

"Oh brother!" She panted. "Yes brother! Harder brother! Fuck your sister!"

Anne's tits jiggled as I fucked her harder. The bunks creaked under my force and her fingernails dug into me. She kissed and nibbled my neck, and it stiffened inside her. I bent to suck on her beautiful tits and she screamed out in pleasure. Muscular walls tightened around my cock and her whole body stiffened. Moans turned into screams and she held me tight. Pleasure exploded within me having my sister cum, and I finished inside her. I held her as I pumped her full of my fluid.

We came down from our sexual highs, and were panting hard. Anne's tits rose and fell with every breath. "That was amazing."

It was."

"I needed some apocalypse fucking," Anne said. "I feel a hundred times better."

I held Anne close and softly stroked her hair as I watched her tits move with her breath. "I know what you mean. Same here. Everything just seems a little better."

A knock on the door interrupted us. Dad's voice made my heart jump into my throat. "Hey, y'all get dressed and come out here. We have to discuss this."

"Shit," we said in unison and hurriedly got dressed. I did take a few precious seconds to watch Anne's breasts bounce around as she put her clothes on, and then I opened our door.

Dad walked us to the living room. "So, it was very obvious what you two were doing."

"I'm so sorry Dad!"

"Don't be," he said. It stunned both of us. "Look, I had a feeling this might happen. It was a risk I considered when I got the bunker. Can't keep two healthy adults in this place with no sexual relief."

"You are two young adults trapped in a bunker with nobody but yourselves and us," Mom said. "Dad satisfies me, but it's only natural that you two would get so sexually frustrated. I thought it'd take longer though."

"Three days seems short," Anne said. "But there's no end in sight. He'll be the only guy for a long time."

"Possibly forever," Dad said with a nod. "Understandable. I do have one request though."

Dad took a deep breath before continuing. "Having a baby down here would not be good, especially an inbred baby. I'm going to have to ask, did you finish inside?"

I hesitated before confessing to cumming inside my sister. Dad sighed. "Please don't ever do that again. I packed emergency condoms, which can be broken down and remade indefinitely by the 3D printer. I used them with your mom, but since you are fucking, you can use them too. Let's hope she doesn't get pregnant from this first time."

"I will." I breathed a sigh of relief. "I can't believe I just got permission to fuck my sister from you, Dad."

"It's the end of the world. Stranger things may yet come."

. Three months after bombs fell and a doomsday prepping family sealed themselves in an underground bunker.

Slowly, I opened my eyes to see the back of my sister's head. Her hair was draped over the pillow and moved with my breath. She was nestled in my arms, with her bare breast touching one of my biceps. We were both naked under the covers as we had fallen asleep that way. My morning wood pressed against her firm ass, and I pressed forward more so that it would be between her cheeks. She breathed faster, but I didn't know if she was awake or not. 

My hand that was over her side moved up to her bare breast. Her nipple stiffened as I slowly rubbed her sensitive areola. Soft moans came from her throat, and I think she was starting to wake up. I kissed and sucked on her neck while my other hand went between her legs. Coarse pubes brushed my fingertips as I made my way to her sex. I slowly rubbed her and her ass backed into me more. Her ass tensed around my hard cock and I groaned at the sensation. 

I continued rubbing her as I positioned my cock to her sex. It was completely wet and I slipped into her wet warmth. We both groaned from the penetration, and I slowly moved in and out of her. The way she groaned, I knew she was awake now.

"Good morning Anne."

"Good morning," Anne said. "I thought Dad said to use a condom?"

"We used our last one yesterday, I have to recycle them in the synthesizer."

Anne let out a louder moan before speaking. "I don't want to be pregnant."

"That's why I'm about to do anal."

"Anal?"

"Your pussy has natural lube, so I'll pop in."

Anne took a deep breath. "I've never done anal before. Have you?"

"Yes," I told her. "I'll go slow."

I pulled out of Anne and moved my cock to her asshole. She seemed tense, so I told her to relax as I pushed my dick into her small opening. Her moans grew louder as I stretched her entrance, and then I was in. Natural lube from her pussy helped a lot, and I rubbed her clit to help her. Anne screamed out so loud that Mom and Dad no doubt heard in the other room. 

"Pain or pleasure?"

"Both," Anne said. "Don't you dare stop though."

I pushed into her ass further until it was fully in. She moaned deeper once I was fully inside, and she grabbed onto my arm. Fingernails dug into my arm as I pushed in and out of her. Her voice reverberated in the vents as she enjoyed it. "FUCK YOUR SISTER'S ASS!"

I sucked and kissed the side of her neck and she begged for more. I sucked so hard that there would definitely be a mark there. Neither of us cared in the moment. As she got used to it, each time I thrust in, she threw her ass back. My balls slapped against her, and I fucked her harder. Pleasure built within me, and I warned her. 

"Cum inside my ass!" Anne demanded. 

After a few more pumps, waves of pleasure burst within me and I filled her ass with my seed. Her body grew stiff and her shouts of pleasure quickly drowned out my groans. We rode our orgasm together until every bit of semen was within her. I pulled out of her and she turned around to kiss me. 

"How did you like it?"

"I'm sore, but that was amazing! We need to do this more often!"

"Absolutely." We kissed on the lips and stared at each other for several long seconds before we got up to get dressed. I took the trash bin of used condoms from the week prior, and started to bring them to the material recycler when I took one last look at Anne. She was getting dressed, and was still topless. Tits bounced around as she moved and gathered her clothing. On my way out, I noticed the calendar. Three months we'd be down here. Three months since I started fucking my sister. 

Celebrating when I first began fucking my sister gave me mixed feelings. On the one hand, it was the start of great sex, and a complete change to our family dynamic. Our parents were understanding and accepting given the circumstances, and it quickly became like when I dated other girls. This girl just happened to have the same parents as I did. A week in to fucking my sister, Dad disassembled the bunk beds so that they could be next to each other inside of on top, which allowed us to sleep side by side. This felt far more intimate.

On the other hand, our anniversary of sorts is also only days after the bombs fell and lots of people died. I'd never see any of my outside friends ever again. So, it felt weird to celebrate. 

Fucking my sister was supposed to be a simple release, since she was the last girl my age I'd ever see again. But I feel it has started to become something more. Especially after that first week when we started sleeping side by side. We fucked almost every night before going to sleep, and we've just grown closer in the past three months. 

Dad was near the synthesizer as I approached it. While it was awkward at first acknowledging that I fucked my sister, he seemed more mellow about it now after three months. 

"You had a good morning."

"Heard that?"

"We're not deaf." Dad smirked. "Gave it to her good, then?"

"First time anal."

Dad's eyes went wide. "How'd it go?"

"She said she liked it, even if it made her sore." I dumped the condoms and their wrappers into the synthesizer repository. I closed the lid and pushed the button to watch them dematerialize. Light shined on them, and they broke down to their molecular structures that would then be sucked into the holding canisters. I pushed a series of buttons so that more condoms would be made. A light shined in the exit point and I watched condoms being assembled and sealed in wrappers right in front of me. The whole process took seconds, and I had another week's supply of new condoms. 

"That's great," Dad said. "Do you feel satisfied by her?"

"Dad?"

"I'd ask the question if you were dating someone else."

"Fair enough," I said. "She is incredibly hot and fucks great in bed."

"Nice tight pussy?"

I could only nod.

"I know I'm her dad, but she is quite attractive even while wearing clothes."

"Oh, she looks a lot better naked." Talking this way to Dad felt comfortable for some reason. Maybe because I had no other guy friends to talk to about her?

"I bet." Dad seemed off in dreamland as if he was imagining his own daughter. "Is this turning into something beyond just physical?"

I sighed. "I honestly don't know, Dad."

"It's OK to have romantic feelings for her," Dad said. "It's been three months, and radiation levels outside haven't dropped much. It won't be safe to go outside anytime soon, and even if it will, the world won't be the same. Old family values may not hold."

"I'll keep that in mind." I picked up my condoms and headed back for my room. Anne was still topless, and only in her panties. "Still not dressed?"

Anne pushed me against the wall and closed the door. She took one of the fresh condoms from my hand. "I was waiting for one of these."

Anne unzipped and pulled down my pants and boxers in one movement. Seeing a horny, topless Anne taking my clothes off for me got me hard again, and so she tore open the condom wrapped and slipped it on. Condom technology came a long way in the last few decades, and there was virtually no loss of sensitivity. I could still feel all the details of her juicy pussy.

Anne pulled her panties to the side and mounted my cock. She moaned at the penetration as her tight pussy slid up and down my organ. Our lips pressed together and I held her ass to feel it flex with every movement. She moaned into my mouth and out tongues intertwined. Her panties added extra friction and extra pleasure. I kissed down her neck and sucked on her collarbone. Her pussy squeezed me tight and moans escaped her lips. I helped her bring one leg up so that her pussy was even tighter on me. We moaned together from the pleasure. 

Anne writhed and tightly held me as she rode her orgasm. I blew my load into the condom and held her as the waves washed over me. She lifted herself off my dick and panted. "I love a morning quickie with the fresh condoms."

I could only nod as I watched her naked body move around the room and get dressed. As I peeled my condom off, I noticed that in our excitement, we'd opened the door. Panic struck my heart and Mom was standing just outside. Her eyes drifted to my cock and were wide. 

"Sorry," Anne said. "I must've left it open."

"Sorry Mom," I said. For the moment, I was too stunned to close the door. I managed to throw the condom away and reach for my boxers.

"Accidents happen." Mom's eyes still hovered on my cock. "Closed space, something like this was bound to happen eventually."

Mom had seen everything by that point, so I left the door open while Anne and I got dressed. Anne broke the tension by suggesting a board game. So, we broke out Monopoly. An old classic that never grew out of style. The box was faded and the brown cardboard showed through the white finish in some places. It was quite old. Mom was the shoe, Anne was the thimble, and I was the racecar. The game lasted for quite a while. When the bank ran out of money, I jokingly got out my wallet and used the dollar bills. "It's worth about the same now, anyway."

Anne and Mom chuckled as we used the real dollar bills. Anne pondered, "I wonder what the currency will be once we re-emerge?"

"Something like bottlecaps," Mom joked. 

I laughed. "That's so dumb!"

"Exactly," Mom said. "Though, not much more sense that rectangles of paper."

"Fair enough."

Dad popped in long after the game had started and nobody wanted to start the whole thing all over, so he settled for watching us play. He got bored and wondered off to do something else. The game went on for a good hour or so until Mom went bankrupt. Anne had the most money, so she won the game. She stood and cheered. I gathered my dollar bills back while Mom put the actual game pieces back into the fragile box. She stood and put the box away, and as she did so, I took the opportunity to check out her body. She was definitely older, but still very attractive. Her butt looked like it was still firm, helped by the exercise equipment Dad smartly remembered to have down here. Her breasts were larger than Anne's and held their own shape nicely. Looking at her breasts, I noticed her nipples poking through the thin fabric. She wasn't wearing a bra. Her tits were just that perky. 

Before she could notice, I stopped checking her out and suggested a movie. Mom selected one from the hard drive and started it up. About five minutes into the movie, Dad joined us and sat next to Mom. It was an action movie released last year. I remembered watching it in theaters. The lead was an muscular male and a sexy blonde female with big tits. About half an hour into the movie, she ripped open her top to expose her large tits and he sucked on her nipples. 

I was already hard from the scene, and I began to rub Anne's nipple over her shirt. It visibly stiffened and she shifted in her seat before reaching onto my thigh. Her nimble fingers stroked my thigh and get closer to my stiff rod. At first, her fingernails graze it with subtlety, but then she strokes it more. I glance over at Mom and Dad to see if they've notice Anne and I, and they were already making out. Dad had Mom's big breast in his hand while their mouths pressed together. Mom already had her hand in Dad's pants. 

"They're busy." Anne kissed my ear and gently sucked on my neck. "We should get busy too."

I turned toward Anne and let her kiss me on the lips. Her tongue pushed into my mouth and I gladly accepted. Her hands went under my shirt and her fingernails raked down my chest and stomach before pulling the garment over my head completely. I reached under her top and massaged her tits as we kissed. She kissed me harder as I tweaked her nipples and she began to grind against my cock over our clothes. Slowly I worked her shirt up before exposing her tits. 

We both paused and glanced at our parents, and Dad had Mom's top off completely. It was shocking to see her bare tits like that for the first time. She had very good tits, and were every bit as perky without her top on. Her red nipples were stiff from Dad sucking on them. Mom pulled her panties down from under her skirt and Dad unzipped his pants. He looked at me and tossed me a spare condom from his pocket. 

Anne took off the rest of her clothes as did I. I slipped my condom on and Anne pushed me to sit down. She guided my cock into her and we both moaned at the penetration. Her hips rocked over me as she gave me a penetrative lap dance and I held her ass as she moved. Tits bounced in front of me and I leaned forward to suck on them. More moans escaped her lips, and I realized she wasn't the only one moaning. 

Mom was bent over the side of the couch while Dad fucked her from behind. Her tits swayed under her and she moaned as Dad pounded her. He reached around to toy with her clit and Mom's moans nearly drowned out Anne's. 

Anne forced me to face her again and she brought her mouth down on mine. We moaned into each other's mouths. Our hands explored our naked bodies, all while our parents were fucking not even three feet from us. The movie had long since moved on from the sex scene, but none of us were paying attention now. 

Both women's moans grew louder and Anne's pussy squeezed me tight. I came into the condom and she rode me until her orgasm was completed. When we'd finished, we shared a last tender kiss. 

Mom let out a loud screaming moan while Dad finished as well. Dad pulled out and they kissed each other tenderly too. Her large breasts heaved with every deep breath. 

"Your girl is pretty fine." Dad looked his daughter up and down while he took off his condom. 

"So is yours." I now made no attempt to hide the fact that I was checking out my mother. 

"Thanks for opening the door earlier," Mom said. "It was great to get a preview."

"No problem, Mom."

"You weren't lying, his cock is pretty big," Mom said. 

"Thanks," I said before turning to Anne and kissing her again. "I love you."

"I love you too."

"No, I love you love you," I said. Maybe it was the post orgasm bravery, but I threw caution to the wind. 

Anne hesitated for several agonizing seconds before showing her beautiful smile. "I feel the same way. I love you too."

My whole family was naked in the living room of the bunker. The TV was playing a movie we had long since stopped paying attention to. My dad had just fucked my mom right next to me while I fucked my sister in front of them. My eyes went back and forth between my sister and mother as I examined their beautiful bodies. Both incredibly sexy, but in different ways. Mom's tits were larger and more mature, but had very little sag. My sister, Anne, her breasts were only slightly smaller. Anne's nipples were a slightly lighter shade of pink while Mom's were almost dark red. I also noticed that Mom kept her pubes trimmed, even after three months underground. Anne shaved hers, but was showing slight stubble as it had been a couple days since her last shave.

As I was checking out Mom, I also noticed Dad was enjoying the sight of his freshly fucked naked daughter right in front of him. Anne definitely noticed too as she was eying Dad up and down. 

It was Mom that finally broke the silence. "I can't believe we all just did that."

"I got horny during when the girl in the movie took her tits out." Dad grabbed Mom's breast and squeezed. She let out an excited squeal. "Made me think of her breasts. Things went from there."

I nodded. "We got horny too, and I went for it after we saw you going for it."

"He almost wanted to stop," Mom said. "But after I took my top off, that sold the deal."

"Would've sold the deal with me too," I said. "You have great tits, Mom."

Mom put her hands on her hips and pushed her chest out to show her tits more. "Thank you, son! They're all natural."

"As all natural as it gets in 2053," Dad remarked. 

Mom playfully slapped him on the arm. "Doctors did a few touch ups, but you know they're real."

"You're right. They are real." Dad leaned and kissed Mom. "And they're amazing."

Mom lovingly ran her fingers through Dad's hair and then patted him gently on his cock. She patted it a couple more times before smirking. "Let's go hit the showers."

Dad kissed her on the lips again. "I agree."

"Let's shower too," Anne told me before leaning into my ear to whisper. "I need some 'I love you' sex."

Mom and Dad went to their bedroom bath to shower, while Anne guided me to ours. She turned the water on, and it was immediately the perfect temperature. The water synthesizer was perfect at recycling the water just how you wanted it. Water sprayed Anne's gorgeous naked body, and I admired her shiny, sexy form for a second before joining her in the shower. 

As soon as I was in, Anne pressed her lips to mine. I opened my mouth to accept her tongue and she grinded her pussy against my dick. Wet, hard nipples pushed against my chest, and I angled my cock to penetrate her. Her soft moans vibrated inside my mouth as I pushed into her. She was still very wet from when we just had sex, so I slid in easily. 

Anne's arms wrapped around me tighter as she clung to me. "I love you so much."

I slapped her ass and water splashed off the splatter the shower wall. "I love you too."

Anne kissed my cheek and nibbled my ear. "What about condoms?"

"I'll pull out." I pushed Anne against the shower wall and fucked her harder. Her wet hair cascaded around her face, which twisted in pleasure as she felt my dick going in and out. With a spare hand, I rubbed her clit. Her moans echoed off the enclosed walls. Her pussy squeezed me and so I fucked her harder. Moans turned into almost deafening screams within the small confines of the shower. I barely pulled out in time. Ropes of cum sprayed her lower belly and she struggled to keep her footing as she orgasmed standing up. I watched her tits bounce with crest of her orgasm as she shouted my name. 

White fluid rinsed in the water and ran down her leg before circling the drain. We helped each other wash off after we'd fucked. I couldn't keep my hands off her titties and I ran my fingers through her stubble pubes. She got her razor and shaved the stubble away so that it was perfectly smooth again.

"I can't believe we just fucked right next to Mom and Dad," Anne said.

"That was wild," I said while soaping Anne's newly smooth pussy. "I noticed you told Mom about my dick?"

"She asked about it. She wanted to know how satisfied I was. I told her that I was very satisfied with your big dick." Anne rubbed soap on my dick and stroked it as she talked about it.

"And you intentionally opened the door to let her watch us fuck?" I reached up to soap up her tits and squeeze her nipples.

"Didn't think you'd mind. She wanted to see it for herself. Neither of us thought we'd all fuck in the living room like that."

"Oh, I don't mind," I said. "It was pretty hot."

"And Mom liked your dick, apparently." Anne turned around so that I rub soap on her amazing ass.

"And I liked her tits." I snuck a finger under Anne's ass to rub her pussy lips. "I talked to Dad about you too."

"Oh?" Anne moaned slightly as I rubbed her before turning back around and letting the water rinse her body.

"He thinks you're hot."

"Well, I am." Anne took her time to soap up my chest and lower abs. She gave my dick a single stroke before going back up to my arms.

I kissed her on the lips. "Indeed, you are."

"When I talked to Mom, she brought up the idea of exploring each other."

"Like swingers?"

Anne nodded.

Thoughts of fucking Mom entered my head, and my cock twitched in front of Anne.

"Well, clearly you like that idea," Anne said. "Turn around. I want to soap your butt."

"I do," I said while turning around. Anne's delicate hands rubbed soap over my butt and she squeezed a several times. "Were they swingers before the apocalypse?"

"No, but it's something they want to try." Anne smacked my butt to let me know she was done. "We are going to be down here a long time."

I paused and let the water rinse me off. "Would you be down for fucking Dad? I mean, you're already fucking me, your brother, but this is different."

"I know it's different." Anne turned off the shower as we were both clean by this point. "I mean, it's not like he's not fuckable, y'know?"

"Right." I nodded as I dried myself. "I love you Anne. I'm not exactly closed to experimenting with another couple, even if that other couple is our parents."

The day progressed. Anne and I mostly kept to ourselves, with playing games on our handhelds. It became time for family dinner. I heard Mom in the kitchen open a few cans, and the smell of food wafted throughout the bunker. When Anne and I entered the kitchen, I saw quite an interesting sight. 

From the back, it was clear that Mom wore nothing under her cooking apron. Her tits were shaped nicely in the apron, and she greeted me when we entered the room. She acted like nothing was different. I decided to play it cool, and we made small talk until the food was ready. Then she untied the apron and took it off. My eyes went to her incredible tits and she grinned when she saw me looking. 

"You saw them earlier, I figured what's the harm in topless dinner?"

"No harm at all." I let myself get closer to look at her tits. "They're beautiful."

Mom smiled. "Thank you. You can touch them if you like."

"Really?"

Mom nodded. I looked to Anne and she nodded as well. I reached my hands forward and touched Mom's large breasts. Her breasts were soft and smooth to my hands as I massaged her magnificent tits. Her nipples hardened against my palms and I moved my fingers to circle her areola. 

"Oh, that feels so good to have my son doing this," Mom moaned. I leaned forward and put her left nipple in my mouth. Her moans got louder. "Oh, that feels really fucking good."

My hands started to explore the rest of Mom's body, and she seemed to come to her senses when she stopped me. "OK, that's enough for now."

"Sorry, did I overstep?"

Mom shook her head. "It's time to eat. I cooked the food, so we have to eat it. Food is too scarce to waste."

Mom was right. Anne and I took our places while Mom served the food. Dad joined us just in time, and asked how everybody was. 

"Well, a minute ago, our son was feeling my breasts."

Dad's eyes went wide and he looked at me. For a moment, I felt fear until he grinned. "What'd you think, son?"

"They feel as great as they look."

"Glad you like them," Dad said. "I know I do. By now, I'm sure Anne talked to you about experimenting?"

"Yes, Dad."

"And?" Dad glanced over at Anne as he stabbed a piece of food with his fork and brought it to his mouth. "How'd you feel watching your boyfriend fondle my wife?"

"Honestly," Anne said. "It was kind of hot."

Dad took a bite of food and sipped his water before reaching over to gently rub Anne's breast. "How's that?"

"Felt nice." Anne smirked and I could tell she was reaching over to touch Dad's thigh. 

"It does feel nice." Dad massaged Anne's tit through her shirt. Her nipples hardened under the thin fabric and she began to breathe harder.

"Not at the dinner table, you two," Mom said. 

"OK," they said in unison. Dad pulled his hand away from Anne's breast with obvious reluctance and returned his attention to his food. Anne also seemed reluctant to return to her food.

As we all ate, I continued to look over at Mom's exposed tits. They were so beautiful, and I wanted to squeeze them more. Mom told me how much I had grown into such a handsome young man. She then corrected herself and called me a stud. 

"Of course, my heart will always belong to your father, as it has for the last 25 years," Mom said. "And we hadn't explored much outside of each other, except for occasional porn."

"Why change now?" I said. 

"We're all trapped down here together, and I know your sexual relationship very well." Mom took a bite of food before continuing. "I'd been getting hornier for you the longer we've been down here. Fucking in front of you was good ice breaker."

"Watching Dad bend you over was hot!"

"Wait till you're the one bending me over," Mom said.

Just then, Dad stood from the table, along with Anne. "Margaret, we're finished eating. I'm taking Anne to our room."

"OK, Harold. I love you." 

"Love you too, honey."

Anne kissed me on the cheek before leaving with Dad. "I love you."

"I love you too." I smacked her on the ass. "Fuck him good."

Anne winked. "I will."

Dad put his hand on the small of Anne's back and guided her to our parent's room. I heard the sounds of kissing and clothes being undone before the door sealed shut. The thought of Anne being ravaged by Dad made me hard.

Mom looked at me and my plate. "It looks like we're done too."

"Looks like we are." I stood up, and walked my Mom to the room I shared with Anne. With each step, my heart raced all the wat to my throat. When we entered the room, Mom shut the door behind her, and I took off my shirt. Mom got closer and kissed me on the collar bone while her hands and fingernails explored my torso. Having my mother feel me up and kiss me in a very non-motherly fashion sent a thrill through my whole body. She noticed the bulge in my pants and ran her hand to stroke me over my clothes. Her fingers worked the button and fly before pulling my pants and boxers down. 

I was completely naked before my mother, and her eyes went wide at the sight of my cock. She knelt down and kissed the tip before taking it into her mouth. Her warm wet mouth engulfed my sensitive organ. I ran my hands through her hair as she bobbed back and forth on my dick. Her horny eyes looked up at me as she deepthroated me. Her throat squeezed my tip and a moan escaped my lips. 

Mom gasped when she came up for air and began to take her own pants off. "Can Anne do that?"

"No." I watched Mom get naked in front of me, and her plump ass move as she walked to the bed. She lied down and opened her legs invitingly. I crawled over her and she took my mouth with hers. She penetrated my mouth with her tongue and our hands explored each other. When I rubbed her pussy, she was incredibly wet and my fingers slid right in. 

"You're horny to fuck your son?"

"Yes." Mom grabbed a handful of my ass cheek and spanked me. 

"You want your son's dick?" I circled Mom's clit with my middle finger and watched her moan under me. 

"Fuck yes." Mom kissed me on the lips again. She grabbed a condom from the nearby stand and forced it into my hand. "I can't take it anymore. Put it in me!"

I grinned and tore open the wrapper to put the condom on. Guiding my dick to Mom's wet pussy was one of the hottest things I'd done. The head of my penis slid in easily as she was already so wet. I groaned as her warm pussy squeezed my cock. I took my time and slowly inserted every inch into her until my balls touched her. We moaned together as I filled her.

"How does Mommy's pussy feel?"

"Oh, Mommy's pussy feels so good." I leaned for another kiss, but Mom turned my head away to suck on my neck. She sucked hard enough that I was certain there'd be a hickie and I thrust into her pussy. Fingernails clawed and raked my back. I cried out in pleasure and pain as I sped up inside her. "You like your son's dick?"

"Oh, I love my son's dick!" Mom's fingernails sank into my muscular ass as I fucked her. She clawed up my back so that I knew it would leave marks. Marks that I could be proud of. Her breasts bounced and the bed creaked as I fucked her harder. She moaned loudly and soon her moans mixed with Anne's muffled moans through the walls as she cried out for Dad to fuck her. 

I pulled out of Mom so that I could turn her over. I took a moment to admire her ass as she turned over before guiding my dick into the back of her pussy. "Get on all fours." 

Mom raised herself to all fours with me still inside her. I gripped her hips so that I could fuck her doggy style. With each thrust, her ass rippled from the force. As I watched it move, I raised a hand and slapped with all my strength. She moaned from the sensation, and so I slapped her again. Over and over, she moaned until her ass was completely red. Then I started on her other cheek. 

"Oh fuck, son!" 

I pounded her pussy from the back and her moans got louder. I reached around to rub her clit and she couldn't hold back anymore. She screamed out her pleasure. "Yes son!"

Mom's pussy squeezed my cock in a rhythm. I knew she was close and I warned her that I was too. 

"That's great son! Cum with me!"

"Fuck, Mom!" Pleasure burst inside me and I filled the condom. Mom let herself lean back and I grabbed her breasts from behind so I could ride my orgasm within her. Her pussy squeezed and her moans got louder. She grabbed my hands that were on her tits and held them closer so that we'd both enjoy our orgasms. 

When the last wave passed over me, I pulled out from her pussy and peeled the condom off. Semen sloshed around inside it before I threw it into the bin. I turned around to see Mom staring at my ass, and now my dick. It shined with the semen and lube. A single white droplet was left in the tip of my dick and Mom told me to bring it to her. I walked to her and she leaned over in the bed to lick my sperm. Her lips pursed and she licked the entire tip to be sure. 

"Mmmm, my son's semen." Mom swallowed the tiny amount and looked up at me. "That was great, we need to keep doing this."

I got into the bed to lie next to Mom and she put her arm around me. Her face rested on my shoulder and we drifted off to sleep.

This story, unlike the previous three chapters, is a bit longer and explores the Dad's point of view on the events that have transpired. All characters involved in sex are 18 or older. *

Nukes had fallen on several major cities just days ago. Fortunately, I had a bunker that my family could retreat to. It was myself, my wife Margaret, my 19 year old daughter Anne, and my 18 year old son Dave.

I noticed Dave and Anne flirting just days after we were locked down here. They shared a room because the bunker did have limited space (though it was big enough to be a semi-comfortable apartment). They made physical contact throughout the day, and I snuck glances at them cuddling on the couch. A sex scene in the movie caught their attention, and they could barely keep their hands off each other.

"Think they're going to do it?" Margaret whispered as she saw me spying on them.

"Probably," I whispered back.

"It's not like they can get a boyfriend or girlfriend of their own outside of each other."

I nodded and walked with my wife back to our room. "We can't stop them, but we will have to give them the talk soon."

We heard their door close, and then shortly afterward we heard Anne screaming for her brother to fuck her harder. She was very vocal in her pleasure, which I didn't expect from my daughter. As I listened to her enjoying her fuck, my cock began to lengthen. I told myself that I shouldn't respond that way to my daughter.

"Sounds like they went through with it."

"Sounds like it indeed," I said. "She's certainly enjoying herself."

"Our boy must know how to treat a girl right."

Fatherly pride warmed my heart. "Damn right he does."

"So, we're talking to them after she finishes?"

"Yeah." It was very obvious when they stopped fucking. Anne let out an enormous scream louder than the others before it, and my cock was rock hard by now. Images of my own daughter screaming out her pleasure and covered in a thin sheen of sweat involuntarily entered my mind. It excited me more.

Margaret patted my thigh and snapped me out of my perverted imaginings. "Sounds like they're done."

I nodded and knocked on their door. I asked them to get dressed and come on out. Their faces had pure horror when they came out. They must've assumed we'd be mad. Before I could speak, I couldn't help but notice Anne's nipples were still erect from her arousal. She didn't normally wear a bra, such was 2050s fashion, and so her aroused nipples were very visible. Her heavy breathing brought her chest up and down to draw my attention more.

When I told them it was very obvious what they were doing, Anne nearly cried. Her chest heaved and she belted out an apology. All I said was, "Don't be sorry."

Anne was stunned into silence, and Dave's eyes went wide. Margaret and I explained that we knew they'd likely be having sex. They were two young adults trapped together in a bunker underground. It was only inevitable. Both of them relaxed after that. I also explained to Dave how to use our synthesizer to make condoms, as apparently he had cum inside her. I tried to fight away images of my daughter's pussy oozing with my son's semen.

"How does this thing make such good condoms, but the food tastes like garbage?" Dave asked.

I chuckled. We had used the food synthesizer before during drills, and the food that comes out is best described as nutrient slurry. Fortunately, we had stocked enough canned goods to last a long time so we could avoid using it for as long as possible. "Human taste buds are a tricky thing, son. The synthesizer can make material for condoms and shape them, even have them thin and lubricated. It can also make simple fabric, like for clothes or tampons. But food is trickier, as you're very used to the way food tastes that a slight alteration makes it unpalatable. Also, the texture is way off."

Dave nodded as he pushed the button to synthesize a dozen condoms. Light shined and they materialized in the compartment within minutes, complete with foil wrappers. He reached in and grabbed them when they were finished. "Hey, thanks for understanding, Dad."

"Can't expect my son to be condemned to a life of celibacy down here."

Dave smirked. "Right. I never fully realized how smokin' Anne is until now also."

There was no denying Anne's beauty. She resembled her mother, but a little more petite. Her breasts were slightly smaller than Margaret's, but quite big. Her ass, objectively very nice to look at. She had a nice shapely ass, which I caught myself checking out a couple times, even before we got locked in this bunker. She often reminded me of Margaret when she was that age, when I first met her as a young college student, and I a professor. Of course, my wife was still smoking hot. She kept herself in reasonable shape, and her breasts had very little sag. Her tits were slightly bigger than Anne's, and she adopted the braless fashion that the younger generation liked so much. She was able to turn heads, back before those heads exploded in a nuclear apocalypse.

The day proceeded more or less as usual. Anne and Dave could barely keep their hands off each other, as new couples tend to be. Anne's nipples were almost constantly hard as she was apparently excited by her new guy. My wife and I went to our room for the night and undressed as we slept naked. She lied on her side so that I could spoon her. My cock rested against her warm, plump ass and began to stiffen on her crack. My hand went to her large breast and I gently squeezed.

Not long after, Anne's moans sounded throughout the bunker. She begged her brother for more and she moaned out her sexual pleasure. My cock got stiffer in Margaret's ass and she shifted in the bed. She used her ass cheeks to rub my cock as I circled her nipple. Soft moans escaped my wife's lips and she turned her head slightly so as to invite me to kiss her. Our lips pressed together and I squeezed her tit harder. My cock brushed against her warm, moist entrance and I felt her moan into my mouth.

Margaret broke the kiss for a second. "Get a condom."

I love when she seals the deal like that, and I got a condom from next to our bed. She helped me put it on my hard dick before going back to her side position. As I started to spoon her again, this time I guided my cock into her. I pushed into her warm, wet entrance, and her walls squeezed on my cock as I entered.

"I love this pussy." I'd been fucking this pussy for over 20 years now, and every time it's just as magical.

Margaret's walls squeezed me and I let out a moan of my own. "It loves you back."

I fucked her slowly in the spooning position and her moans got louder. I could still hear the passionate screams of my daughter, and I got more turned on so I picked up the pace on my wife. She rolled over so that she was on all fours and I fucked her doggy style. Her big tits hung beneath her and swayed with my force. I raised a hand and smacked her on her firm, plump ass. It shook every time I thrust into her and she got louder. I smacked her again and again, and each time she gave a loud squeal.

Pleasure built in my balls and as Margaret's moans started to become screams, I let myself explode into the condom. Waves of orgasm washed over me, and I stayed inside my hot wife until I finished. I peeled off my condom and put it in a bucket for later recycling before cuddling my wife. It was silent now, as Anne had apparently finished. Neither of us said anything about how Anne's moans turned me on.

Days passed and became weeks. Everyday, Anne would get very noisily fucked by Dave. Almost everyday, I fucked my wife to the sounds. As I fucked Margaret, I never pictured that I was fucking Anne. However, Anne's moans certainly helped get me started.

Hearing Anne moan so sexually really hammered in that my daughter was an adult, sexual being. I noticed her body more as we spent more time in the bunker. Many times I forced myself not to stare at her tits, especially when her nipples were hard. There were times that I'd swear she was actively flirting right back as she pushed her chest out as I approached. She also apparently owned a couple sheer tops that showed off her pink nipples that she didn't bother covering herself up at all. I certainly didn't complain, and neither did Margaret.

One night, I got up late. Margaret was sound asleep, and I felt the need to get some chips. It was one of our last bags that we'd hoarded. In fact, it was one of three. Possibly the last three bags of these corn chips to exist in the world. I broke the seal on a can of dip, also one of our last, and helped myself while I read an e-book.

As fate would have it, Anne also seemed to have trouble sleeping. I heard the door to her and Dave's room open and shut, and then heard her footsteps on the floor approach the kitchen. She used the flashlight on her phone (no connection and nobody to talk to, but our offline apps were still fun). She seemed to not notice me in the darkness, and she went to the fridge. Light shined on her gorgeous body and I was immediately hard. She apparently didn't expect me to be out here this late (2 in the morning), and she was completely naked. Her firm round ass poked out as she looked in the fridge for some food, and I stared at her exposed pussy. She was still in shadow, but I could make out every important detail.

She got her food, leftovers from dinner, and shut the fridge. She reactivated her phone light, and walked over to a light switch so she could heat it up. Light filled the room, and I saw her perfect titties. Not even sheer shirt in the way now, I saw her beautiful pink nipples. My eyes went down to her pussy, which had just the right amount of stubble.

"Holy shit, Dad!" Anne gasped. "I didn't think anybody else was up."

"Clearly." I gestured to her body.

Anne looked down at herself and nodded. However, she made no attempt to cover herself. "Yep, I really didn't. Well, now that you've seen everything, what do you think?"

"Excuse me?"

"Think I haven't noticed the way you look at me sometimes? Men think they're so subtle."

It was my turn to be flabbergasted, and I stuttered a bit before managing to string a sentence together. "Well, you have a very nice body."

"Thanks, Dad." Anne made her way to reheat her food, and I took my time to check out her bare ass, now in the full light and no longer in shadow. She must've noticed me checking her out because she gave her ass a little shake. "You're not so bad yourself."

"Oh?"

Anne turned around and let the machine reheat her food before kneeling down to kiss me on the cheek. Her naked nipple brushed my shoulder. "You're a very handsome man, and Mom is a lucky woman. Of course, I haven't seen you naked like you've seen me."

"I'm glad you're not creeped out by me."

Anne scrunched up her face. "I'm already fucking my own brother, and I'm the only woman besides Mom down here."

"I still love your mom."

"I'm sure you do." Anne leaned against the counter, and I watched the subtle movements of her boobs. "But even when we had a normal life, I'm sure you still checked out hot young women."

"Well, yeah."

Anne gestured to her beautiful body. "Well, now I'm the only hot young woman around, so it makes sense your eyes gravitate to me."

"Insightful."

"I try." Anne smiled her beautiful smile and shifted her body so that her tits stood out more. The machine finished heating her food, and I checked out her perky ass when she turned around to pick it up. She carried it over to the table and sat near me to eat it. "So tell me, how hard are you?"

"Excuse me?"

"What?" Anne took a mouthful of food and swallowed it. "We talked about me and my body. Let's talk about yours."

"Well yes, I am quite hard."

"Can I see it?" Anne wriggled her eyebrows.

I was about to object, when I realized I'd been staring at her naked body this entire time. I shrugged. "Only seems fair, I suppose."

Anne's eyes followed me as I stood, and I hooked my thumbs into the hem of my pants. Her eyes were glued to my crotch as I slowly tugged my pants down, and it excited me that such a hot young woman was so excited to see me expose myself. I hadn't intentionally exposed to anybody but my wife in a very long time. My rock hard cock bounced as I freed it from the confines of my pants. Her eyes went wide at the sight of it.

"It's so big," Anne said. "Nice to see where Dave gets it from."

"Thank you." Excitement filled my dick as Anne stared at it longer.

Anne stood and approached me. She place a hand on my chest, and the other rubbed my abdomen with the clear intent of going lower. My heartrate and breathing raced when her soft fingertips brushed my pubes. "I'd love to stroke it."

"That would be crossing a line." It took every ounce of will to say that.

"Just a few strokes," Anne pleaded. "It's only cheating if you cum."

Somehow, that made more than it should've. Still, I had to keep my resolve. "We can't."

"I'll let you touch my tits."

Well, that did it. "OK, but just a few strokes."

Anne nodded. "Just a few."

Anne's cool hand wrapped around my cock. Pleasure shot up from my cock through my stomach and my hand immediately went to her soft tits. Her nipples stiffened and her breathing hastened as I felt her amazing tits. She stroked me faster, and a finger went to rub along my balls. I suppressed a moan myself, and my hands wondered to other places on Anne's tight body. Her ass was firm to the touch as I grabbed and squeezed a handful. She grinned and returned the favor with her free hand. As she stroked my cock, she pulled me closer until the tip of my penis brushed against the stubble of her pubes. Her pussy was soaking when I touched between her legs, and she gave out a louder moan that I was afraid would wake somebody up.

"Oh Dad, I want you inside me."

I gently rubbed her clit and watched her squirm. She squeezed my cock so that it almost hurt, and part of me wanted to take her right then and there. "Oh baby, I want that too."

Anne brushed the hand that was rubbing her clit away, and she moved to angle my cock toward her opening. My tip felt her moisture, and I barely managed to get control at the last second. "Wait!"

Anne frowned. "I don't want to wait!"

I gently pushed back so that I wouldn't penetrate my daughter. "We can't cheat. Let's discuss it with our people."

"But Dad, I'm so horny!"

"Baby, I am too," I said. "That's why I'm going to head back to my room and fuck my wife. You do the same to your brother."

Anne waited a full second before nodding. "Makes sense."

I let Anne put her food back in the fridge and watched her naked ass disappear into her and Dave's room. I switched out the lights and headed for Margaret. As usual, she slept in only her panties, and currently she was lying on her belly with her panty class ass exposed to me. She was still asleep when I pulled her panties down to expose her sex, and I crawled onto the bed behind her.

I inhaled my wife's lovely scent before dipping my tongue into her pussy. Moans vibrated inside her and she shifted in the bed. Still, she seemed mostly asleep as I ate her out from the back. Her taste got stronger as her juices started flowing more, and she began to stir. Soft moans escaped her mouth and the muscles in her thick thighs quivered. All the while I ate my wife's pussy, the naked image of my daughter was fresh in my head.

I brought myself up from Margaret's pussy and donned a condom before guiding myself into her from the back. After the way Anne had me primed, the condom was probably the only way I was lasting more than a couple minutes. She was still asleep as I felt her wet warmth around my organ. Her walls gripped me tight as I slid in and out and her body suddenly jerked.

"Oh Harold!"

I leaned down to kiss my wife, and she met my mouth with hers. No doubt she tasted herself on my tongue, but she made no objection. In fact, she seemed to like it. "Sorry honey, I couldn't sleep."

"Oh, don't be sorry." Margaret pushed herself against me as I fucked her. As Margaret's ass shook with every thrust, I imagined how Anne would look in this position. Her firm, 19 year old ass shaking from my thrusts. Imagining fucking Anne got even easier when I heard her muffled moans through the walls. Those moans were soon drowned out by closer moans, and I realized I was really pounding away at my wife. "Fuck yes, Harold!"

I mercilessly slammed Margaret's pussy and she moaned out her pleasure as her pussy got tighter. "Oh, I need to be fucked like this, Harold!"

I raised my hand and slapped my wife's thick ass as hard I could. She squealed in delight and her pussy cleaned as she demanded more. I spanked her until she thick ass was blood red. I grabbed a handful of her shoulder length hair and tugged as the pleasure grew in my balls. She moaned louder and we came together. My body filled the condom with semen, and I gave a thrust for each wave of pleasure inside her.

The condom shined with my wife's juices, and she turned around to help me peel it off. After I threw it away, she sucked the remaining semen off my cock to clean me off. I was so sensitive after just cumming that the sensation of her lips on my cock was amazing. "You deserved a cleaning off after that fucking you just gave me."

"I got horny and couldn't sleep."

"Well, Amen for horny insomnia," Margaret joked. We both listened to Anne's sex moans get louder and louder until she climaxed. "Sounds like they had horny insomnia, too."

I chuckled nervously. No way of telling how Margaret would react if she knew what I almost did with our daughter, or what I was thinking about earlier.

"You know," Margaret said. "She's getting even more open about her sexuality, at least around me."

"Oh?" I was afraid to say anything else.

"Yeah, we were just talking the other day about how good of a lover Dave is."

"Well, that's my boy!"

"Yes, I know you're proud of your son's prowess," Margaret said. "But the way she talked about him so openly felt different. She assured me that it was like if she talked about any other boyfriend, and we have talked about her previous boyfriends before, so I guess it made sense."

"Right. Dave talks about his conquests sometimes too."

"Of course," Margaret said while her hand lazily stroked my cock. "But the way she talked about him, I don't know. It made me kind of curious, I guess."

"You're curious about our son?"

"No!" Margaret said quickly. "Well, maybe a little. I don't know. I mean, she said he has such a nice dick, and you've got a nice one too, and you have the same genes. I mean, you ever get curious about Anne?"

The mention her sent lightning through my heart. "Um, no."

Margaret kissed me on the cheek. "The hesitation clearly means yes. It's OK, it's only natural. We have a beautiful daughter, Harold."

I kissed my wife on her cheek right back. "She reminds me a lot of you when we first met."

"Ah, to be a young, naïve student falling for my sexy professor again."

I squeezed her ass. "Hey, post apocalypse milf ain't bad either."

#

Since I hadn't slept much the previous night, I slept in a little bit the next day. I woke up to an empty bed as Margaret had gotten up hours ago. Muffled sex came from Dave and Anne's room, and this time louder than usual. As I left the room to get something to eat, I noticed the calendar. Just three months since we'd been down here. Already so much had changed.

After I'd finished eating, Dave emerged from his room holding a bucket of used condoms. He was headed for the synthesizer. "You had a good morning."

"Heard that?"

"We're not deaf." I smirked. "Gave it to her good, then?"

"First time anal."

My son just fucked my daughter in the ass. I imagined the feeling of Anne's virgin asshole being opened for the first time. "How'd it go?"

She said she liked it, even if it made her sore." Dave emptied the bucket of condoms into the synthesizer and pushed the button. The machine broke the used condoms and torn wrappers into their base components. This create the appearance of them evaporating to nothing. He pushed another button and new condoms were assembled from stored particles. They appeared to come from nowhere, and then wrappers formed around them. A green light told him that they were ready and he retrieved them from the machine. 

"Do you feel satisfied by her?" Thoughts of Margaret saying how open Anne was about sex made me wonder how much more open I could get Dave. 

"Dad?"

"I'd ask the question if you were dating someone else." Plus, you were just talking about fucking her in the ass. Don't 'Dad' me. I didn't say that last bit, though when I thought about it later, I wish I had. 

"Fair enough," Dave said. "She is incredibly hot and fucks great in bed."

"Nice tight pussy?" I imagined how tight my sweet daughter would be. Dave only nodded in reply. "I know I'm her dad, but she is quite attractive even while wearing clothes."

"Oh, she looks a lot better naked." 

"I bet." I smirked. This I knew. Couldn't let him know about last night just yet. Images of Anne naked danced in my head, and I shook them away to hold normal conversation. I remembered the calendar. Three months. That's a long time for casual sex. Radiation levels hadn't gone down much, and it was still radio silence on the comms. We'd be down here longer, and I wanted to know how the relationship with my son and daughter were progressing. "Is this turning into something beyond just physical?"

"I honestly don't know, Dad."

"It's OK to have romantic feelings for her," I told him. "It's been three months, and radiation levels outside haven't dropped much. It won't be safe to go outside anytime soon, and even if it will, the world won't be the same. Old family values may not hold."

"I'll keep that in mind."

Old family values indeed. Like nearly fucking my own daughter as she fucks my son. Margaret was reclining on the couch watching an old TV show when I joined her on the sofa. She nodded a greeting at me as I got comfortable. I put my arm around her and felt her warm closeness just as Anne and Dave started right back up. I chuckled to myself. That boy couldn't wait for his new condoms. 

Shortly afterward, Margaret got up and walked out saying she had to use the bathroom. Right as she left, I noticed the sex noises get louder. I glanced over and saw the door had opened. Anne's titties jiggled as Dave fucked her hard, and Margaret was right outside their door staring at them. Whether in shock or arousal, I didn't know. I wish I had the view Margaret did; from way back in the living room sofa, I could barely see Anne's body. Just as I was wondering if they knew, Dave finished, and then noticed his mother watching them. He rapidly apologized as they got dressed. Margaret took it in stride and told that accidents happen. Dave didn't seem to notice me watching from the living room, and I was still getting sneak glimpses of Anne getting dressed. 

Anne suggested they play Monopoly, and I lost interest. My cock was still hard from that amazing view, but I was more interested in the TV show than their game. When the episode finished, I wondered if Monopoly was code for something and went to check on them. Indeed, they were playing Monopoly. Dave had broken out his real dollars after the bank ran out, and we all joked about how worthless the money was now. After a while, I went back and watched more of the show. A short time later, Anne cheered her victory. 

I went to the bathroom after the second episode, and when I came back, Margaret was picking out a movie. One of my favorites; a blockbuster from last year. It was an action movie, and even better than the action itself was the sex scene about a half hour in. The lead actress was hot as hell, and her tits were similar in size and shape to Margaret's. As the scene got closer and closer, my cock got harder. Something Margaret definitely noticed, and she rubbed it over my pants. 

I was still hot and bothered from watching Anne get fucked. I pressed my lips to Margaret's. Her tongue penetrated my mouth and I let my hands explore her body. My hand closed over her large breast and I her nipple pressed through the thin fabric. When I glance over at Dave and Anne, they've started to explore with his hand on her breast and hers in his crotch. Her nipples were noticeably stiff, and I almost stared until my wife guided my mouth back to hers. 

Our tongues danced and my wife moved her hips over my crotch. Her skirt rode up, and the heat of her pussy radiated through the thin fabric of her panties, and I needed her more. My hands squeezed her plump ass, and for a second, I hesitated. This was going past the point of no return and I wasn't sure if we were ready to have sex right in front of Dave and Anne. Margaret seemed to sense my hesitation and she whispered in my ear, "It's OK."

Margaret licked my earlobe when she whispered and she sat up straight to take her top off and expose her gorgeous melons. I sucked her red nipples as I rubbed her soft flesh. The idea that my son would see my topless wife and be aroused by her excited me more. She gyrated her hips against me more until she took off her panties. I unzipped my pants, and I glanced over just in time to see Dave and Anne headed in the same direction. Luckily, I happened to have two condoms in my pocket. I was a doomsday prepper after all, of course I always come prepared with extra condoms. I tossed one to Dave before putting one on myself. 

Margaret lowered herself onto my cock and fucked me with her lap dance. She rode me fast than ever, and her wet walls squeezed me. She brought my face to her large tits and nearly smothered me in her cleavage. Beads of sweat had formed on her supple flesh, and I licked them to taste her salty flavor. Margaret let me up for air and our mouths pressed against one another. Her hips stopped moving, and she lowered completely letting my cock fully fill her. 

"Your daughter is right over there, getting fucked," said Margaret. "Have a look."

With this invite, I turned my head to stare. Anne was giving Dave a similar penetrative lap dance that Margaret was giving me. My eyes went up and down Anne's gorgeous body. I watched her tits bounce every time she went up and down on her brother. The muscles in her ass flexed with every movement. Each time she moved, I knew my son's cock was filling her. As usual she was being very vocal about her pleasure as she fucked my son, which made it all hotter. 

"Bend over the couch," I told my wife. She obeyed, and my cock was exposed to the air again. I positioned myself behind her, and fucked her pussy from behind. Her moans mixed with Anne's and got louder as I rubbed her clit. Walls got tighter around me as she neared climax. I took the opportunity to stare at Anne's naked body while I fucked my wife. As I did, I noticed my son checking out my wife's tits. Just as I wondered if he was having similar fantasies, I came. With my climax, I slammed my cock into my wife, and her whole body shuddered as she arrived too. 

Anne pinched her nipples and screamed out her orgasm. Dave held her close as he came as well. We took our condoms off and I told him what a hottie Anne was. She looked over and winked at me. Dave told me how hot he thought my wife was as well. It was nice to have it all out in the open. 

Then my wife said something that stunned me, and she thanked Anne for leaving the door open and then commented on Dave's cock. Dave appreciated Margaret's comment, and he turned to Anne to tell her how much he loves her. She replied in kind and they kissed tenderly. A truly sweet moment as I could tell they cared for each other far more than brother and sister. For several long seconds, we stared at each other's nudity. I certainly enjoyed the sight of Anne's hot body, and she returned similar looks to me. 

Margaret broke the silence. "I can't believe we all just did that."

"I got horny during when the girl in the movie took her tits out." I grabbed my wife's tits and she let out a playful squeal. "Made me think of her breasts. Things went from there."

Dave nodded. "We got horny too, and I went for it after we saw you going for it."

"He almost wanted to stop," my wife said. "But after I took my top off, that sold the deal."

"Would've sold the deal with me too," Dave said. "You have great tits, Mom."

Margaret put her hands on her hips and pushed her chest out to show her tits off to her son. "Thank you, son! They're all natural."

"As all natural as it gets in 2053," I quipped.

Margaret playfully slapped me on the arm. "Doctors did a few touch ups, but you know they're real."

"You're right. They are real." I leaned in and kissed her boobs. "And they're amazing."

Margaret ran her fingers through my hair and then patted my cock. She patted it a couple more times before smirking. "Let's go hit the showers."

I kissed her on the lips and we walked to our bathroom to shower. We helped each other soap up our bodies. Her large breasts shined with the soap and my hands glided over her slippery flesh even better. When I went for her pussy, she stopped me. "No, you already came once, and you need to save that ammunition."

"For what?"

"Don't you want to fuck your daughter?"

The sentence nearly made me fall over, and Margaret took my stunned silence as an opportunity to playfully soap up my sensitive cock. "Fuck our daughter?"

"Yes, that was one of the topics Anne and I discussed. She even let me get a sneak peek at Dave."

If my wife was being this honest with me, I owed her the same honesty. I told her about last night when I nearly fucked Anne. How we were both naked, and my cock was even touching her wet pussy. But I managed to stop and fucked my wife instead. Margaret's eyes went wide and for a second, I thought I fucked up telling her. 

"Few men would be able to stop in that position," Margaret said. "Good on you. And that was the best sex you've given in a long time. She excited you that much?"

"I love you first and foremost," I told her. "But Anne is really fucking hot."

Margaret nodded. "Dave is pretty nice too. I was hesitant on this whole thing, but maybe trading partners could be great for us."

"You fuck our son while I fuck our daughter?"

"Seems fair." Margaret rinsed the soap suds off her body. "As long as we are each other's first and foremost."

"Always." I kissed her on the lips, and then stared at her ass as she left the shower to dry herself. I snuck glances at her naked body while she dressed herself. She never put on a shirt, and instead wore just pants. She threw on an apron before heading back into the hallway. "Dinner in ten."

My heart hammered while I finished showering. Was this really happening? Fucking my daughter while my son fucks my wife. It was so surreal. Naked Anne popped in my head again, and I fought the temptation to rub one out. I wanted to be ready for the real thing; can't waste a shot on the fantasy. 

I dried off and dressed myself. Unlike Margaret, I was fully dressed when I headed out. Dinner was already cooked and on the table. Margaret had taken off her apron, and she ate dinner totally topless. Again, it was so surreal. We had all just finished fucking in front of each other, and here we were about to eat family dinner like nothing happened. All while my wife was happily sitting topless for all to see. "Well, how is everybody?" 

"Well, a minute ago, our son was feeling my breasts," Margaret said. 

The sentence threw me back even though I had just discussed the situation with my wife in the shower. Now it was really happening. The idea of another man fondling my wife, especially that man being my adult son, excited me. Energy went down and filled my cock and I wanted to hear how he enjoyed it. "What'd you think, son?"

"They feel as great as they look."

"Glad you like them," I said. Surely they had to have had a similar conversation I had with Margaret. "I know I do. By now, I'm sure Anne talked to you about experimenting?"

"Yes, Dad."

"And?" I glanced over at Anne as I stabbed a piece of food with my fork and brought it to my mouth. "How'd you feel watching your boyfriend fondle my wife?"

"Honestly," Anne said. "It was kind of hot."

I took another bite of food and washed it down with water before reaching over to gently rub Anne's breast. If Dave got to openly do it, then so can I. Her breasts felt as amazing as they did last night, though now they were behind clothing. "How's that?" 

"Feels nice." Anne smirked and reached to touch my thigh.

"It does feel nice." I grinned as I massaged Anne's tit through her shirt. Her nipples hardened under the thin fabric and she began to breathe harder. Her hand rubbed my thigh until she found my cock. She rubbed it through the fabric and I was beginning to forget about dinner. 

"Not at the dinner table, you two," Margaret said.

"OK," we said in unison. With great reluctance, I pulled my hand away from Anne and returned to my food. Anne hesitated before doing the same. 

"I want to fuck you," Anne said. 

"Let's eat quickly." I began shoveling the food into my mouth. Anne did similar. 

"I've wanted to fuck my dad for a while now," Anne said. "Older men get me so wet."

"Listening to you fuck your brother has gotten me so hard over the past three months," I said before eating more food. 

"Dad, this is a fantasy I've had for a while, but only in this bunker did I actually consider doing it."

"You're hot as fuck Anne," I said. "But I also never considered fucking you until we got locked down here."

"I also love my brother first. He is my man."

"And I love my wife." I looked at both our plates. "Looks like it's showtime."

"Looks that way."

I stood up and told my wife we were done and that I'd be taking Anne to our bedroom. She had been flirting with Dave the whole time, and she only nodded at me to go fuck our daughter. We traded and 'I love you' before I escorted Anne to the bedroom where I fucked my wife so many times. 

As soon as we entered our bedroom, Anne took all her clothes off. Seeing her beautiful body got me instantly hard, and she rushed over to kiss me. My hands explored her smooth, naked body as she undressed me as well. Our lips connected, and it sent a shiver down my spine. Over two decades of only kissing my wife, I had forgotten how exciting kissing someone new was. Her hungry tongue explored my mouth as her hard nipples pushed onto my chest. We were both naked at this point, and my cock pressed onto her crotch. Her crotch was now totally smooth, and I realized she must've shaved in the shower with Dave. 

Gently, I lowered my daughter onto my bed. My daughter now took the place my wife had taken for months, and she spread her legs to invite me in. I crawled to her and kissed her inner thigh. She let out a soft moan, and I took my time to inhale Anne's erotic scent before bringing my mouth to her sex. Moans escalated, and it was a thrill to hear at full volume what had only been muffled before. "Oh Dad. Dad! Daddy! Eat my pussy, Daddy!"

Anne's fingernails went through my hair and she gently pulled while my tongue explored her sex. Firm thighs closed around my head and she bucked her hips. I reached under her to grab her amazing ass to squeeze. Moans were now muffled not with a wall, but with my daughter's thighs. She loosened her thighs around me just long enough to gesture me to come up to her. We kissed on the lips so that she tasted herself on my mouth. Like mother, like daughter. She broke the kiss and handed me one of my condoms. "I need my daddy dick now!"

I put it on in a hurry, and Anne couldn't wait as she was pulling my thighs into her. This was it, I was about to fuck my daughter. I'd entertained the fantasy for months, and stood by and let her have incestual sex with her brother. But now, I was about to partake in incest. The tip of my condom touched her wet entrance, and I felt her warmth through the condom. Slowly I filled her, and she was even tighter than Margaret. 

"Fuck Dad!"

"You OK?"

"Better than OK! Give me that that daddy dick!" Anne sank her fingernails into my ass and tried to pull me into her more. I did not indulge her however, instead I teased her by slowly inserting it. Her moans and pleads got louder, and nothing was hotter than my daughter begging for my dick while her pussy engulfed more of it. Fingernails raked up from my ass to my back before going back down again. My balls touched her ass when I was fully inserted.

"Oh, it's so big!" Anne grabbed onto my shoulder blades to pull us closer together and her tits pushed into my chest. "Fuck me with your big dick, Daddy!"

I pulled in and out of Anne, all the time watching my daughter's face contort in pleasure. As I built momentum, her moans got louder. Her juice dripped down my balls as they slapped her ass with every thrust. Titties jiggled, and I bent to suck on her pink nipples. Her legs wrapped around ass and locked as I pounded her pussy. Her whole body shuddered and her screams of orgasm echoed off the walls. Pleasure exploded within me after seeing Anne climax, and I held her for several long seconds. Wave after wave washed over me as I held my daughter that I'd just fucked. 

We slowly came down. Sweat made her body shine, and her perky tits went up and down with each breath. I peeled off my condom and gave her a kiss on her pretty lips. 

"Everything you hoped for?"

"Fuck yes, Dad." Anne panted. "Mom going to have to learn to share from now on."