Incest Seduction/Take off your top in Zack's dorm
You scowl at your brother, pouty lipped and squinting fiercely. There's no way, after all you just did, that he's going to take this from you. The silence helps build your resolve and you stand up to face your brother before abruptly stripping off your top.
"Kimmy. Come on."
"Zachery. You are not getting out of our bet." You throw down your shirt with a huff then kick your shoes at the door, unintentionally hitting it, before shrugging off the straps of your bra. "You are going to do me in your dorm room. And you're not gonna just stick it in and pretend. You're done when I say you are!"
Your brother sighs, reluctantly staring at your exposed tits. "Goddammit Kimmy."
You grin, taking a moment to relish not only the fact that you're now topless in your brother's dorm room, but that he's not inclined to stop you either. You look around hoping to spot yourself in a mirror but can't see any. Don't boys have mirrors? Reaching under your skirt and hooking your thumbs into your leggings and panties, you shimmy both down your legs little by little only for the door to open once they pass your knees.
"You sure know how to tutor nurses," quips Mike, already leering at your body. You shoot up straight and instinctively cover your chest. Your panties and leggings are bunched up halfway down your legs, well below your short skirt. But then, once you get over the shock, you smoothly bend over to continue stepping out of your leggings while Zack yells at his roommate. And why not? It's not like you're fooling anyone at this point. And frankly you do want people to know why you're here, even if your brother doesn't.
"The fuck Mike?!"
"What?"
"Whaddya mean what?!" snaps Zack.
"I forgot something," he explains, but remains motionless in the doorway watching you undress as a tense moment of silence falls between the three of you.
"...Getthefuckout!" Zack snarls behind clenched teeth, an attempt to keep his voice down.
"Okay! Okay!" concedes Mike, closing the door once again, sniggering to himself.
"He already knew," you offer as some form of comfort. Meanwhile you've gotten yourself very comfortable, every one of your clothes now scattered at your feet with the sole exception of the short skirt still hugging your waist.
"Yeah, maybe," grumbles Zack, "but it doesn't help now that he's seen you naked ."
You flap the front of your skirt, flashing your pussy. "I'm not totally naked, but..." you start, kneeling in front of your brother, "I think he's already seen me."
"What? When di... Oh, the party? Mike saw you at the party?"
You really have no idea. But you love that Zack is getting riled up. "Maybe. Was that jealousy I heard?" You tease, undoing your brother's pants.
"I... no. But I hope he doesn't make the connection."
"It's okay. I can take your mind off it." You say it with Kim's sultry confidence, even though you're practically shaking with excitement. Pulling down the top of his boxers, you free your brother's quickly stiffening cock and lean forward. "Just relax, 'kay?"
You take just his tip into your mouth, quick to peel back his foreskin and swirl your tongue inexpertly around his soft head, just happy to taste him again. After a frustrated sigh, your brother leans back to give you room. Jerking and sucking and flicking your tongue brings your brother up to his full size in no time.
"Wow, your thing is really hard now, huh?" With some more teasing, you overzealously lick the underside of his shaft and watch his whole member flex and strain in front of your face, before all his straining forces a dollop of clear precum out onto his glans. You get even more excited seeing proof of his arousal leaking out of him. After gazing at it a moment, you suck the fresh wetness from his tip before pulling back again and smacking your lips.
"See? This guy's not complaining. You should listen to him." You continue to handle his shaft as you comment. Your brother doesn't reply, fixated on your hand with a grumpy glare as it glides up and down his thick uncut member.
"Zack?"
You both turn as some blonde guy steps into the room. His eyes dart back and forth between you and your brother. It seems to take him a moment to realize that the girl staring back at him is topless and holding Zack's beefy cock in her comparatively diminutive hand. But you watch the look of horror cross his face when it hits him, and it makes you feel weirdly powerful. Feeling especially brazen, you even resume your stroking while staring blondie right in the eyes.
"Dude!"
"Woah! I'm sorry! Mike said that... Nevermind. Sorry!"
He closes the door and you hear laughter coming from the hall. Smiling, simultaneously embarrassed and excited, you look back to your brother only to realize he doesn't share your sense of thrill. While he brings a hand to his face, you stand and rush over to the door, locking it before anyone else can come in.
"That won't even help." Zack mutters with another sigh. "Mike has a key. This is such a bad idea..." Zack starts up his complaining again, but you aren't having any of that. You rush back to him, your skirt fluttering, and push him all the way down onto the bottom bunk. Without another word you crawl on top and start grinding your bare slit against your big brother. He grabs your hips, possibly to slow you down or hold you back, but you're on top. You're in control now. And you're horny as fuck.
You've been thinking about this the whole day. You fantasized through every class. You got yourself so worked up and so wet that you had to go to the washroom between every period, and twice during lunch. And now, as your dripping little pussy finally scratches its itch against the underside of your sibling's colossal cock, you can't control yourself. You start bucking and jerking and panting as you spastically grind on Zack's warm wet meat, not even inserted, with his friends no doubt in earshot, which is a factor you had not considered but one that has only gotten you more on edge. You climax in record speed and squeak a moan through faltering breaths. Zack shoves two fingers in your mouth and you happily suck on them as you regain control of yourself but he's probably trying to keep you quiet.
"I'm serious Kimmy. I could get in deep shit for having a girl in here."
"Then just tell them the truth." You suck your brother's middle finger once more before clarifying, "I'm not 'a girl'. I'm your sister."
The two of you stare each other down, your lust intensifying. You slowly roll your hips again during your staring contest, teasing him further and smearing your orgasm along his length under your skirt. It's kinda fun having your skirt concealing everything, especially with Zack fully dressed. Even if the boys in the hallway were peeking right now, as far as they know you could just be dry humping, unless they snuck a peek at your bum after you leaned forward for a kiss. You smile at the thought. It would be fun to have another secret you and your brother could share.
Zack suddenly tosses you to the side, causing you to yelp. You push yourself up on all fours half expecting another argument with Zack until he flips up the back of your skirt. He crawls over your back, himself forced to stay on all fours since you're on the bottom bunk, then feels his way to your pussy. With his powerful body perched over yours, he deftly sinks himself inside you, entering and filling you so forcefully that you gasp aloud.
Still dressed, he fucks you doggie style, pounding deep and hard. You wince and whimper, dropping to one of your shoulders as you struggle to take all of him. Then you giggle to yourself, enthralled with the fact that your dream has come true, that your big brother is actually fucking you in his dorm room!
Adjusting a little helps you find a better angle and lets you reach under yourself past your hanging skirt to work your clit. Your brother stays close to you, trapping the primal heat between your bodies, breathing against the back of your neck. This is so carnal. It's raw lust. Even though you both know you shouldn't do this, for any number of reasons, none of that matters. He presses on past the taboos and risks and pummels your petite middle school figure from behind. You push back against his weight as he buries himself inside you. His balls slap your busy fingers as you inch closer to another orgasm. You only just came, but your diligent digits try to find a second one, even as they twitch every time he bottoms out in you. But when his arm wraps around your side so he can palm one of your small tits he inadvertently pushes you over the edge. Your brother has probably hugged you a million times, but to be held in his strong embrace while he's frantically thrusting inside you...
You drop your face to his pillow and scream into it as you convulse. He fucks you faster, excited by your second orgasm in as many minutes, but it's all too much for you. Weakly flailing your arms for him to stop, you moan and drool into his pillow as he pounds you silly. He does eventually take the hint and pull out of you. Your stiff body instantly slumps and you flop down the short distance to the bed with a groan of relief.
Both of you take a moment. Zack stands to finally get himself undressed. You roll your way off of the bed then stumble over to the window, your knees shaky.
"W-why is it so hot in here?"
"It's a shit dorm. That's it really."
You crack the window then slide it open as far as it will go, which isn't especially far. The air outside isn't exactly cooler than inside, but it is at least fresh air. You bask in the paltry breeze while stepping out of your skirt.
"Will you get away from the window! What did I say about being discrete?"
Feeling naughty, you lean against the pane and look out past some thin trees, lingering long enough to follow a pair of students walking some distance away, just to make your brother sweat a little. You then turn to him with a smirk. "I'm discrete."
"You're a pain in the ass," he complains, finally standing naked and fully erect. It's still amazing that huge thing of his fits inside you. It frankly doesn't, and you love it. You spin away from the window, leaning up against the wall beside it, stretching your slender limbs as you look him up and down.
"If I do get you in trouble... then I suppose you'd have to punish me."
Zack shakes his head. "Just get over here already." Skipping back to him, you jump into your brother's arms, throwing yours around his neck. He barely catches you. "Jesus! You're lucky you're light."
"Yeah? Just do me already, you whiner," you snark back.
"What, like this?" He repositions you, hooking his hands under your legs so he can lift you away from him. It seems he's just joking, flapping your ass in the air, but you bite your lip and nod then briefly reach down between you to grip his cock, lightly wedging his head between your lips.
With everything lined up, it takes mere seconds before you're slipping down his slick shaft again. But Zack takes it slow. He doesn't try to cram it all inside you again, instead hovering you halfway down his length. Maybe it's more comfortable for him to hold you here. It sure is more comfortable for you. Despite this, his dick is still stretching you in every direction. But this crazy mid-air joining feels so different. With your legs split open and your body held away from him, air from the window rushes between you and spills over his length to cool your warm pussy.
There's a weird distance between you, even as Zack is half buried in your pussy. Nothing but the breeze is touching your vulva, ass, and inner thighs; only his dick and your lips are making contact with each other. Your smile slowly grows and you catch his gaze, the two of you pausing to soak up how wild this is. Having your brother's lamppost of a cock splitting your tight labia so pointedly, so clinically, is almost surreal, like an out of body experience.
And then he moves you. Any direction feels like magic, your stretched inner lips tingling with electricity. You rest your forehead on Zack's shoulder, both of you staring down at this incredible sight, full inches of his cock sinking inside you and then sliding back into open air a second later. In reality Zack is standing perfectly still, sliding you up and down his cock like a toy. And it's perfect. You want him to use you. All of your senses are focused on those several thick inches; in and out, again and again.
After a minute of pure awe, Zack adjusts his grip and you sink much lower. You gasp and groan and suck in your tummy, shocked once again by just how much dick he has. Zack chuckles and starts moving you again, but he keeps you as low as he can, uncomfortably full, just to see you squirm. You grunt and pant with each hefty drop, your pussy straining and cervix distending.
With your tummy sucked in both of you can see every time Zack bottoms out inside you, his cock visibly deforming your stomach below your belly button. It's small but noticeable. You both chuckle when you see this, but even at this new extreme depth he still has shaft to spare. Holding you still, he throws speedy little minithrusts at you to push at your insides, making you whimper and bringing your nails to sink into the back of his shoulders. The two of you watch the small bump in your tummy wiggle and oscillate as he bounces and grinds your cervix, forcing your womb to shift, as if there were something inside of it.
"You... j-jerk..."
"Mmm, yeah, you love this shit."
You respond with pants and moans. You do love this, your brother doing whatever he wants with your body. Pain be damned, you just want him to to take you, to own you, to fuck you, utterly.
Zack does back off though, once he's had his fun, pulling you up to a more pleasurable height where he can thrust more freely. You shudder as a wave of endorphins hits you, not quite an orgasm, just the relief and satisfaction of your insides slipping back into place and his thick member eagerly gliding past your labia once again. But it's not long before he slows, your bounces all but ceasing.
"What's wrong?" you ask, a little worried. "Are you tired, or-"
"I'm g-gonna cum. We... gotta pull out."
"No." You reach down like before and wrap your fingers around the exposed half of his shaft, holding him inside you. "Do it. I want to feel you cum."
He must have gone right to the edge because a moment later you can tell his seed is already flowing through his shaft. You tighten both your hand and your pussy to better feel the powerful throb ripple its way down his length. The first few throbs release with such an unstoppable force that he blasts through your weakened cervix with ease, coating the inside of your womb with his warm spunk. With the two of you otherwise perfectly still it's downright shocking to be able to feel your brother spray his cum into your nubile middle school womb, your jaw dropping after the first blast. Still looking down you can see his balls clench and spasm as they pump load after load into your still body.
Suddenly Zack grunts, letting out a long held breath, and he takes a wobbly step backward while bucking upward. Is he going to fall over? He's definitely tired. You try to pull yourself higher to support yourself but he's also lifting you, probably afraid he'll drop you. Unfortunately you work together to lift you so high that he slips out of you. The last of his orgasm dribbles out of the tip of his cock while the bulk of what came before that pours out of your split lips onto the rug below. With your legs held open there are no amount of kegels you could do to keep a river of jizz from flowing out of you.
"Aww fuck," mutters Zack, still reeling. He stumbles back, his shoulders bumping his bunk bed, then hobbles forward and tosses you onto his roommate's single bed. "Stupid... gotta... clean that."
Your hands shoot down to your crotch as soon as you hit the bed to try to keep more of Zack from spilling out of you and making a bigger mess. But once you feel his creamy cum on your fingers you need to work it between your labia and pull it up onto your clit. What you just witnessed - your brother spurting inside you, both perfectly still, his cock in your hand - was so crazily hot you have just got to orgasm again, almost on principle. Besides that, playing with Zack's cum gets you so wet, especially with it swimming around inside you.
"You just had to splooge on the carpet, didn't you Zack." Your brother mutters to himself, kicking your clothes in various directions, but most notably off of the rug so that he can better inspect it. He moves to his closet to rummage for something, still muttering. "Couldn't have stepped off the rug. No, had to go and do... your sister..." He glances over his shoulder to spy you already full on masturbating with his spunk, your legs spread wide. "It was fucking good though..." he concedes aloud, much more quietly.
"Mhmmm..." you hum in agreement.
"But this stupid rug. It belongs to the dorm. Why do they put rugs in dorm rooms? I don't have shit to clean a rug." He steps back out with a sock and a water bottle, his godly cock still partly stiff and as thick as ever. When he crouches down to rub at the carpet you watch it swing between his strong legs and you rub your clit even faster. "I don't even want it, but they tried to charge me $200 for it when I got rid of it one time. It's so stupid. They only want them for photoshoots and shit, I don't know why they gotta keep it in here."
He goes on and on but you try to tune him out. You focus on your messy pussy, how his beastly member felt while stretching you, the shock of him spraying right through your cervix. You gaze obsessively at his pulsating cock and powerful balls, thinking how lucky you are to have such a well endowed brother, until you can't take it anymore.
"Zack... Zack!"
He stands, confused. "Huh? What?"
"Shuddup, and... let me c-cum..."
You twitch your legs and moan as your restless clit delivers another orgasm, your petite form twisting and writhing over Mike's dirty sheets. You're only making them dirtier as more of Zack's plentiful cum spills out of you mid climax, dibbling down your ass onto the comforter. If Mike is such a perv maybe he won't even be bothered. In fact you bet he'd love to see this; "Chad's" sister jilling off on his bed.
When you open your eyes a minute later your brother is still stood in the middle of the room, a bottle in one hand and a wet sock in the other, blatantly watching you squirm and writhe and explore your body with your hands. He clears his throat when he realizes he's been staring, but he obviously liked what he saw as his cock is already rising again.
"Okay, um, you're good now, right? You came, I came, so we're done. That was the bet."