17 Chapter Sixteen: That Was Weird, But Wait There’s More - January 14th 2027

So after encouraging Val some Kat watched him leave while shaking his head. He then stood to his feet and went into his house to work on his homework and some of his inventions. All he could seem to think about though was if there was something in the water or air in Sigma that has sparked his friends sudden interest in him.

Its one thing for them wanting to hang around him more and what not but his friends want to fuck him. Well Vixi has always wanted to fuck him but this is different actually now that he thinks about it she hasn't really been pressing him too hard about going on a date or anything. Maybe there was something in the air that has really altered his friends feelings towards him.

Kat then sighed as he walked into the kitchen to grab some food from before heading to his room only to be stopped by his bratty little sister. See their mom worked two jobs so they mostly had free range to take care of themselves but his sister sometimes liked to be a pest. So he braced for whatever stupid task she wanted him to do. It's not like his day hasn't been completely weird enough already.

"What do you want Katherine?" sighed Kat not really wanting to put up with her childish games today and just wanting to go lay down and try and process all that had happened.

"Did your weird friend leave already?" asked Katherine with a creepy smile.

"Yes, and he's not weird. Okay maybe he is a bit but that's not completely his fault he comes from a rich family that doesn't see things the same way we do. So please..." started Kat only to trail off as he noticed the awkward grin his sister had on her face. "What?"

"Well as you know mom wont be home until late so I'll need you to give me a bath and why not just get that out of the way now." replied Katherine with the same grin that was slowly starting to get creepy.

"Katherine you're old enough to take a shower and thus don't need my help." sighed Kat as he turned to leave the kitchen having given up on the idea of eating now.

"But I can't always get every spot and the kids pick on me. Please will you just shower with me then. I wont tell anyone." pleaded Katherine as she put on her best puppy dog face which Kat knew mean if he said no the screaming and yelling was to come next.

"Fine." sighed Kat just as Katherine began to whimper.

"Really! Thanks! You're the best big brother ever!" exclaimed Katherine as she wrapped her arms around his waist with her nose right on his groin to which she snuck a quick sniff.

"Okay let go of me before I change my mind." sighed Kat to which Katherine quickly let go and ran off to the bathroom.

As for Kat he sighed as he headed for his room looking for his swim trunks to wear in the shower. Yah she was only four years younger then him, making her ten well not exactly she was only a few months short but still. She also wasn't really aware of sex and stuff, but more importantly she was his sister. It just wouldn't be right for her to see him naked. Yet with a frustrated sigh Kat was unable to find his swim trunks and marched over to the bathroom to talk with his sister.

"Have you seen my swim trunks?" asked Kat with his hands on his hips.

"Why you plan on going swimming with your friends later?" asked Katherine with a slight tilt of her head to one side.

"No I was going to wear them in the shower with you until you were finished." sighed Kat as he realized she was already naked in the tub waiting for him. He had to shake his head before adding, "Just keep your eyes towards the wall and I'll wash your back okay."

"Alright I wont peak I promise." replied Katherine as she turned towards the wall and waited for him to undress and climb into the shower.

Now once he closed the curtain and turned on the water he gave her the soap and a washcloth so she clean all the areas that she could reach and rinse off while he lathered up her hair so it would be ready to be rinsed out as he washed himself. Now he didn't turn around because that would put his butt in her face when she rinsed her hair out but for that she'd have her eyes closed and be looking up. He'd told her to turn back around and wait for him to wash her back when she was done but she had other plans.

Thus while Kat was cleaning his upper body Katherine popped his penis in her mouth and began to suck it and even though it felt really good Kat dropped the soap and grabbed her shoulders and forced her to stop before lifting her up so she had to look him in the eyes before scolding her, "Katherine Lillian Tombs that is wrong and exactly why I told you to keep your eyes on the wall!"

"I sorry big brother I just wanted to make you feel good." sighed Katherine as she started to softly cry to which Kat pulled her close in an awkward hug.

"Why would you need to make me feel good? Also were'd you even learn of a thing like what you just did in the first place?" asked Kat as he tried to hold her close to his chest but between her weight and both of their wet skin she kept slipping down.

"From one of the movies mom keeps under her bed." replied Katherine with a short sniff just before her eyes went big as she'd slide down her brother's chest enough for the tip of his erect penis to poke into her vagina and they both moaned as it slowly slide in deeper and before he could start to pull her off he felt himself getting close to cumming. Kat careful lifted her off not wanting to hurt her nor to cum in side of her.

He then set her back on the shower floor to which she bent down to get the soap for him but when she stood up her nose brushed his balls and penis just right that he shuttered. She also wanted to give him one last lick of which was just the last he could handle for once her tongue neared the tip he filled her open mouth with his cum as he let out a soft moan. As for Katherine was caught off guard and had a kind of scrunched like face as she licked her lips trying to decide if this was a good taste or a bad one.

"Brother why did you shoot me in the mouth with that weird creamy stuff?" asked Katherine as she tried to get the weird taste out of her mouth.

"It's called cum and it's what guys have that makes it so ladies can become mommies." explained Kat with a pant, "Just finish getting washed up and don't ever tell anyone about this okay."

"Fine." sighed Katherine as she sadly finished washing up before leaving Kat to do likewise.