Limits

The more I thought of what I should make Sister do, the more I realized that I was pretty limited in my options. Sure, since she currently doesn't have that much knowledge about sex, I could probably have her suck my dick and cum in her mouth right now. But it's not like she's gonna remain clueless about sex forever.

What I needed to do is make it, so that in her mind she is the one who approached me. So even if she knew later on in the future what she did, she would not blame it on me. Just like the time when I lost to her before and she said her breasts was in pain, so she had me alleviate it for her.

Of course, I did more than just alleviate it for her. But the point is if she looked back on it, it's clearly her idea and not mine. There is also the method of framing it a way, that it would look like it is only a childish mistake but I can't really get much out of that. What bullshit reason could I even use to have her suck me.

[Ah fuck, years of academy training, WASTED!] I cried in my mind, as victory didn't taste so sweet right now

In the end, my dare shouldn't be anything to extreme as of now. Let's use things that she already allows me to do and things that I slowly built excuses for. There is also the fact, that I 'should' be clueless about sex as well. So it's not like taking things just a little bit further, would make me suspicious.

When she finally finished cleaning up her stone walls, and the massive hole in the ground that was made by her large geyser. She walked up next to me, as waited for my words

"Uhm sis, let's do it like before, okay?" I 'timidly' suggested

"You mean?" Sister asked, not knowing what I meant

"We're pretty dirty right now, so let's take a bath first again okay?"

"Ohh, sure then" she agreed,

"My dare will be done back at home, okay?" I said to her

"Wha-!? But Mom might find out about our fights then?" she exclaimed worriedly

"That's why you'll have to make sure she won't find out." I smiled at her

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"Mom, I'll be sleeping at Big Sis' room tonight." I said while we were eating dinner

"Oh? That's… a surprise.." It seems that Mom expected that I would be 'cheering her up' her again tonight, as she had some pauses on her words but she quickly accepted it.

Speaking of mother, I had the ideal situation already formed with her. In her mind, she was the one who 'corrupted' me because of the night she woke up horny. She tried to cover up her blissful face and her orgasms, as just me 'cheering her up'. I guess she wants to protect my 'innocence', just yet.

Of course, I took advantage as I got more wanton with her body, though I have to hide my boner with my clothes. Because after all, I'm not supposed to be excited. Though lately, She sometimes takes advantage of my supposed 'misunderstanding'. As sometimes she really has been using me to get herself off. Maybe I was wrong in my initial assessment of her, something, something about seeing sex as sacred.

There was this time, when she talked to me and said she was feeling down. Of course, I consoled her, as I hugged and gave her real affection, because I really cared for her as well. But she pressed on, as she slowly directed the conversation into having me 'cheer her up'.

So I played along with her, and made sure she had a huge smile on her face, along with a drooling mouth, both the upper and lower ones. It seems the ability to lie with a straight face, runs in the family.

As I was thinking back, dinner slowly came to an end. I haven't really entered Celine's room that much, so I was pretty curious as to what it looked like. Her room was surprisingly pretty simple, and everything was perfectly aligned and in order. She had notes with her own spell theories written in them, as well as her bow hanging on the wall.

"So what is it?" sister asked

"It's simple Sis, I'll just tickle you for an hour and you just have to endure. Though you have to make sure you're not too noisy. After all, Mom might find us out if you get noisy" I said

It was a pretty 'innocent' and simple task really. Something that if she looks back on it, was really just a child's suggestion. Though I'll do more than just tickle her. The way I worded it made it so that, it seemed like she only has to endure my tickling for an hour, while trying to minimize the sounds that she'll make.

"Oh, that seems… difficult." she almost said 'easy', as I could see her trying to hide her smug grin from her face, well that's better for me. The easier the dare is, the more 'innocent' it will look for her after all.

"Uhm, so get naked first Sis, your clothes might block my hands after all."

It seems she understood, as she started taking her clothes off. As she gave me a quite amateurish, stripping show. I saw that her body has matured since the last time I touched it. Her once 'budding' tits, has now grown into a pair of bountiful, globes. Her daily exercises made her body fit, as her ass looks round and firm behind her. Her being an elf, made her milky white skin look soft and smooth, just like that of a baby's and her long smooth legs had no signs of blemishes on them. And when she finally let her hair down, which was usually tied up in a proper ponytail, she had a more 'homely' air to her, in contrast to her usual cold and stoic look.

As she finished undressing, I also took off my clothes as I sat down on the edge of her her bed and beckoned her to get on top of me. I had her straddle my lap, while facing towards me. I positioned her such that her pussy was just right above my crotch. When her soft, naked ass came in contact with my skin, I couldn't help but get hard.

"How would you tickle me like this?" she asked as I could still see a slight smug smile on her face, as she was thinking that she once again got a free pass for losing.

"Don't worry sis, just focus on not making any noises okay? Mom might wake up after all." I reminded her, as my hands slowly cupped her underboob while slowly moving up. I started sucking on her nipples, like I did when she made me massage her breasts. I licked her pink areola in circles, as I felt her cherry-like nipple harden in my mouth. I then used my fingers to pinch her other nipples, while lightly pulling it as well.

"Silly, you don't know how to tickle someone after all. Fufu~" I can her whisper quietly

As I was sucking one of her tits, and kneading the other with my fingers. I moves my hand towards her face, before opening her small mouth, as I inserted my fingers in her slippery mouth.

"Hm?" I could see her tilt her head in surprise, as I moved my, now wet, fingers down her back as it slowly felt her curves before reaching towards her bare buttocks. Once there, I lubed her ass up with her own saliva, before I started playing with her asshole.

"Hii-?!" She exclaimed, before covering her mouth as she realized how loud she was

I fiddled with the area around her asshole, as I tried to relax the muscles around it. And when I finally felt it was ready, I inserted my middle finger in her ass. I could see the moment when her smug smile disappeared, as her eyes widened into circles and her mouth formed an 'o' shape.

"Mmmh~♥ Wha-?! Nnngh~♥" her suppressed moans came out, as I start moving my fingers inside and out of her butt. Of course, I didn't forget to continue sucking on her tits, as I also started flicking her nipples with my tongue. The tightness of her asshole, made my cock erect as it stood up before bumping into her unprotected pussy.

I re-positioned my dick so that it's sandwiched between her pussy lips, as it caught all of her juices. Making it glisten and slippery. I could see her clenching her teeth, as she tried her best not to make any sounds.

I started pistoning my hips up and down in the bed, as I got her body to start bouncing on my lap. Her firm, meaty ass made clapping sounds, everytime it hit my thighs. Her straight platinum hair, moving up and down with her, while her bountiful breasts swung in all directions in front of my face.

"Ahh, Riel you're too noisy. What if Mom sees us?" She was panicking because of the sounds her butt was making, but it was her hard to take her words seriously, when it's only her tits I could see bouncing up and down in my face.

"That's your problem sis, you still have to endure for an hour" I said

When I felt her asshole slowly accommodate for my finger. I then inserted another one, as I gradually increased the frequency of my fingering. My dick enjoyed the feeling of her body bouncing as her wet, moist pussy lips was rubbing hard, teasing my erect cock.

My tongue got more frantic in its' attack on her tits, as my flicking became faster. I also started to get more aggressive with my fingers as I started twisting her nipples well.

"Mmmh~♥" I can see her close her eyes while biting her lips, as she tried her best not to make any sounds. She buried her face in my neck, as she held onto my back as hard as she could. My usually smug and proud sister, has her body completely at my mercy and the thought of that made me want to take things a little bit further.

"Let's get into another position, Sis" I said after some time as I looked at her face, which were turning pink.

"Uhm… okay.." she followed as she got off from my lap, while panting, her thighs dripping with her own love nectar.