Ending

CHARACTERS ARE 18+

part 1 - chaste face sitting wake-up

part 2 - sister's first orgasm and brother's revenge

part 3 - sibling's deal and public classroom muffdive

part 4 - sister learns what 'anal' is

Each part is about 1000 words. You don't need to read them all to understand so feel free to skip around

Love reading comments!

---

Coming home from the exam you can sense your sister's ready to throw herself at you. She's even more stupid from arousal than she'd been earlier. It had required you to sneak under her table and lick her to orgasm in the middle of the dark classroom just to finish her exam.

She'd needed it to concentrate and in return for your 'kindness' she'd offered you anything.

She whines in frustration as you ignore her. She'll have to learn that your world doesn't revolve around her and she'll get your depraved attention when you feel like it. Or when she earns it.

By the next day she's learnt her lesson. As you're playing videogames distracted she confidently comes around and sits on your lap. She explains she only wants to give you a massage even as she begins kissing your neck cutely. She's terrible at it - totally inexperienced with romance or relationships - but you let her work. Your erection is rock-hard but she doesn't need to know that.

Then she does something unexpected. She sits gently on your crotch and grinds herself on it. She's far too good at it to ignore - probably all that practice she got atop your face - and you quickly have her naked on her bed. She lays on her back letting you appreciate all her curves and her large tits. She's still shy of your gaze as it explores but she doesn't dare cover up - only goofily trying to show off her parts with shaking and pinches.

You turn her around so she lays on her stomach and move down to her beautiful butt. You spread it's round cheeks with excited fingers. Finally getting a good look at her entire body in the daylight you can't help but realize something.

Her asshole's perfect.

A small pink thing tucked away and very shy of any attention - you choose your target. You can't imagine how tight it must be. You ask if she's ever played with it before and she shakes her head 'no' confused. She didn't even know you *could* play with your asshole. That just makes her day of ruination all the better and all the hotter.

"That's dirty brother you mustn't!" Even as she complains you feel her relax and push out on your tongue - coaxing it deeper into her girly asshole. She giggles between anxious exclamations as she gets her ass eaten. She didn't realize this was what that meant - but if the way you nibble, suck and lap at her rim is any indication then she'd say the description was apt. Your thumbs pressed into her and spread her - trying to loosen the impossibly small orifice to something you could work with. Your cock was much larger than average and you wanted to brutally fuck her here everyday for a week.

You withdrew and watched your work reveal itself under your gaze. She tried to clench herself shut but her muscles were too relaxed. Perfect.

You ask her to spit in your hand and rub it on your cock as you bring it from your shorts. She gets the message and spits in her own hand then jerks you off gently. She wants to see your copious precum - she's sure that'll be enough lube. Little does she know that being fucked wasn't something you could 'handle' as much as it was something that made you bite your pillow, cross your eyes and try hold onto your sanity.

"Still think I'm a pervert?" You mock over her as you finger her entrance. She shakes her head. "You don't think I am? Isn't fucking your sister's ass 'dirty' too? Tell me what you'd have done if you knew this is what I wanted a week ago."

A bit of a stuttering mess, she explains she'd probably snitch to your parents after recording your extreme confession for her friends to laugh at together. You ask if that was something they still did and she bowed her head shamefully. She admitted they all had a small crush on the 'hot brother' and tried to get your attention that way. She thought it was funny feeling anything for but hate but really that was just how she compensated.

Her hands come to her butt and spread it trying to open her hole more - it feels incredible for her already.

You wonder if you'd ever let her experience it in her other pink and puffy entrance. If she was already exposing herself for you and grinding back on your fingers - did a cute buttslut like her even *deserve* to be fucked vaginally?

You slap her butt harshly making her whimper. You love the sounds she makes now that the two of you are home alone and in private. She's clearly embarrassed of them but doesn't dare disobey and hide them.

You bring your excited dripping cock to her butt. You feel her wrinkled hole kiss your cockhead as it winks at you. You instead hotdog your length between her cheeks - giving her a terrifying idea of just how large and how girthy her brother's cock is on her body.

You bring it back and press in. Her asshole can barely stay intact as it's spread apart. It feels like you're working a battering ram inside her she squeezes on you so tight. You worry it's too much but looking up you see her drooling into her pillow and whispering something over and over.

"More."

You grab her neck around the front from behind as your other hand finds her wide hip. You penetrate her as she shakes while swallowing your cock to it's middle. Her tunnel is never still inside seeming to squeeze and shake or simply pull on you as it tries to adapt. You know it won't manage. Yet as your sister's almost-asphyxiated mind cries for it deeper you know you have to comply.

Soon you have two-thirds of your length inside her as you figure this is about as far as she can manage - atleast for now. You pull back and worry it'll be a struggle to fuck her if she's going to be this tight. However she crazily works her hips back on your crotch on her own as her red flesh seems to want to suck your cock in. You give a short experimental thrust and it only serves to push her over the edge into her first orgasm of the night. She doesn't let you slow down after that.

You squeeze her neck cruelly as your lips find her ear and whisper dirty things to her. You can tell you're rocking her world apart. You don't know if she'll ever be the same bitchy brat after this but you don't care. She'll have found something better than a life fighting against her brother.

"I'm going to give you something. You're going to enjoy it and beg for more - eventually. You don't deserve it anywhere else - especially not in your pussy - so get ready pet!"

You cum inside - not even bothering to ask if she's okay with it as she'd only beg for it - and empty your balls inside her quivering form. You grab her hair and pull her into a rough kiss - dominating her mouth with your experienced tongue. You push balls deep through her last mental and physical resistance and hold her there until you're finished. She can feel the warmth flood her guts and she loves it. She only wishes her womb could feel the same.

You don't pull out instead drawing her into a cuddle with you as the big spoon. You wrap your arms around her belly as your hands thumb and play with her soft but heavy breasts. It won't be long before you can go again - may as well work another orgasm out of her in the mean time. You kiss her pretty neck and know you've found another one of her sensitive spots. As you kiss up along it to her chin you find her staring deep into your eyes.

"I love you." She blurts.

----

I read all comments :)