Elliot slammed Maddy against the desk with enough force to make her go weak at the knees. Her entire body was engulfed with wet, hot desire. Elliot’s hardness throbbed between her legs, aching to penetrate Maddy’s bare pussy.

“Mmmfuck!” Maddy yelped as Elliot grazed her nipples with his teeth, teasing and pulling just enough to ignite that delightful spark of pain and pleasure.

She responded to his animalistic ferocity in kind, pulling at the roots of his hair and clawing at his chest. But Elliot could not be matched. A primal desire had been unleashed within him and it could not be caged. Maddy’s body glistened with sweat, and Elliot licked it off her, dragging his tongue from her breasts down to her tummy. When he reached her pussy, Maddy could hardly contain herself, screaming out in ecstasy as Elliot teased her flit with a flick of his tongue.

“Tell me what you want, Maddy.” Elliot leaned forward again, pressing the hard tent in his pants against Maddy’s wet entrance.

Maddy shuddered, barely able to string one thought after another. Her mind was a haze of lust and unrelenting desire. All she could focus on was the proximity of her naked body to that warm pulsing at Elliot’s groin.

“I-I need your cock inside me,” Maddy moaned, thrusting her hips against Elliot’s erection.

Elliot didn’t need to be told twice as he hastily unbuckled his pants and let them fall to the ground, his impossibly hard cock springing forward.

“You want your own brother’s cock inside you?” Elliot’s voice was low and gravelly. “This is really what you want?”

Maddy was flailing on the desk, the sensation of Elliot’s cockhead sliding against her entrance almost too much to bear. Her brother was going to fuck her. That was all she needed.

“P-please, fuck me, bro.” Maddy closed her eyes, focusing on the pulsing sensation between her legs. “Stick your big, fat brother-cock inside my pussy.”

“God, I’m gonna fuck you so hard sis,” Elliot groaned, enjoying the feeling of his sister’s folds teasing the underside of his cock as he moved against her again and again.

“Fuck bro… Stop teasing me already and plow me!” Maddy pleaded. Elliot just grunted in response.

Maddy yelped as Elliot’s strong arms suddenly flipped her over, sending her face down, bent over the teacher’s desk. Her arms stretched out to grip the edge of the desk, her breasts pressed against the hardwood beneath her. But that delicious rubbing sensation at her entrance had vanished.

“Bro? Where did you-” 

Maddy gasped as her brother’s cock slid into her in one slick motion. It filled her up completely, her pussy lips stretching to accommodate her brother’s considerable girth.

“Holy FUCK!” Elliot half-shouted, half-gowled. “You’re so fucking tight, sis!”

She couldn’t talk, couldn’t breathe, couldn’t think. Maddy moaned in unrelenting pleasure as she was stretched out by her brother’s cock, Elliot inching forward as he finally hilted himself deep inside his sister. It was a pleasure like Maddy had never experienced before. She had never been filled like this.

“Ffffuck,” Maddy finally gasped. “Mmm, your cock feels so good, bro…”

Achingly slow, Elliot pulled back, until only the bulging tip of his cock was enveloped by Maddy’s cunt. She squeezed her thighs together, desperate to feel that filling, stuffed feeling once again.

“Do… Do you like the feeling of your cock in your tight sister’s pussy?” Maddy bit her lip as she twisted to look at Elliot, the torrent of desire in his eyes causing her to melt.

As if in response, Elliot thrust back into Maddy, throwing his head back with a roar of pleasure as he slammed into his sister. Maddy clutched the edges of the desk for support, her eyes rolling back as she felt Elliot’s cock massage those innermost walls of pleasure.

“I want to fuck you, Maddy,” Elliot said, leaning forward such that his voice was a low whisper in his sister’s ear.

“Fuck me,” Maddy said immediately, squeezing her core around Elliot’s cock, tightening her entrance around his shaft that much more. Elliot moaned in response, but didn’t move.

Taking matters into her own hands, Maddy moved onto her hands and knees, arching her back and presenting her perfect ass and pussy, the latter of which had Elliot’s cock buried to the hilt, to her brother.

“Fuck me now,” Maddy said again.

Elliot slowly moved his hips back, savoring the feeling of Maddy’s tight pussy lips choking his shaft. It was agonizing. Maddy wanted her brother to rut her.

“Fuck me! Fuck me, bro! Please fuuuuck me! I want your thick brother-cock to me cum!” Maddy grew more desperate, arching her back even deeper as she pleaded to her brother.

His sister begging so openly seemed to break something in Elliot, and without warning, he suddenly grabbed Maddy by the waist, drawing himself back into her fully. 

Then, before Maddy even had time to readjust to Elliot’s full, hard length, he started fucking her like there was no tomorrow.

“Yes, yesss.” Elliot used his sister’s ass like handlebars, pulling Maddy against him as he slammed into her again and again. “You’re suuuch a good slut for your brother’s cock.”

Maddy could only respond in shrieks and moans, the wonderful sensation of her brother’s cock sliding in and out of her tight cunt like nothing she’d ever felt before. Her nails dug into the table as Elliot’s cock sent waves of brutal pleasure cascading through her body. There was no thought beyond that pleasure, that delicious sensation of her brother crammed deep inside her cunt.
 
Maddy was nothing but a pleasurable wreck of nerves and sweat as Elliot fucked her thoroughly from behind.

But one thought pierced through the haze of sex-fueled fucking. I need to give little bro the fuck of his life.

Determined to make her brother feel just as good as she felt, Maddy clenched her core, tightening around Elliot’s cock with a vice-like grip. The sensation almost seemed to make Elliot blow his load right then and there, if his suddenly shallow breathing and tightening of his grip on her hips was anything to go by.

Smirking deviously, Maddy tightened her core again, twerking her hips delicately as Elliot plowed her. She continued this clenching and unclenching, arching her back and thrusting back, even as she could feel her own orgasm on the horizon. Maddy wanted to overload her brother’s cock with sensation. She wanted to milk him.

“Brooo…” Maddy moaned, throwing her head back in pleasure. “Cuuuum inside me, bro.”

For a moment, Maddy was afraid Elliot would pull out. He seemed to hesitate, inching back. But Maddy just clenched down on her core muscles, bringing her legs closer together as he choked his dick with her cunt.

“Ohhhhh my god.” Elliot dug his fingers into Maddy’s ass, barely hanging on as she worked her magic on him. 

“M-Maddy,” Elliot stammered. “A-are you…?”

“Yes, I’m fucking protected!” Maddy yelled. “Now fucking cum inside your sister like a good brother!”

Elliot needed no further permission. He slammed back into his sister, fucking her with quick, short thrusts. His sudden frenzied fucking drove Maddy wild as her own orgasm was quickly cresting.

“Fuck! FUUUCK!” Elliot leaned forward, pushing his sister against the desk as his movements grew more erratic. “I’M GONNA CUM, SIS!”

Maddy was slammed back against the desk, her arms giving out from under her. But she didn’t care. She didn’t care even when her arm flailed outwards and accidentally struck the projector button on the desk, turning on a science slideshow. She was in heaven.

Elliot’s cock spasmed deep inside her pussy as he slammed into her with increasingly frantic movements. Every muscle in Maddy’s body tightened around her brother’s cock as her mind went blank with pleasure. Her entire world was the hard desk pressed beneath her face, Elliot’s hard body pressed against her ass, and that wonderful throbbing cock lodged deep inside her pussy.

Maddy came deep and hard. Her eyes rolled back in her head and she shuddered uncontrollably, writhing about on Elliot’s cock.

Elliot wasn’t far behind Maddy.

He unleashed himself inside his sister’s cunt, spraying cum deep inside her. He didn’t stop fucking his sister until long after his throbbing orgasm had finally subsided, eager for Maddy to milk every last drop of cum from his cock.

The scent of sex hung thick in the air as brother and sister panted for breath, utterly spent.

Slowly, Elliot came to his senses, unsheathing himself from his sister’s pussy. He staggered back, collapsing onto the floor.

“Holy fuck,” he whispered.

Maddy slowly sat up, moaning at the delicious ache between her legs. A dribble of cum squeezed out from her pussy, leaking onto the desk. She scooped a little up with her finger and tasted it, savoring the salty taste.

“It was all worth it,” Maddy finally said. “Your cock belongs inside me, El.”

The siblings finally made eye contact, an awkward silence descending as they considered the other’s sexy, nude bodies.

“You’re right,” Elliot finally said, his green eyes shimmering with desire that was more than simple lust. “I belong with you.”

The siblings could hardly keep their hands off each other for the rest of the day. Even after they got dressed, shed their graduation gowns, and left the privacy of the classroom, Maddy’s mind still lingered on her brother’s cock. She yearned for that warm, aching feeling of his manhood filling her up. She replayed the guttural, animalistic sounds Elliot had made as he’d cum inside her. And she squeezed her thighs together, savoring the trickle of warm spunk seeping out of her cunt. That was the best sex I’ve ever had in my life…

“Where did you two run off to?” Maddy was pulled out of her cock-addled craze by her mother’s voice shouting at her from across the school gymnasium.

“Uh, sorry,” Elliot said, side-eyeing Maddy. “We both had to, uh… go to the bathroom.”

Maddy rolled her eyes. Elliot was good at sex, but a liar he was not. 

“Okay…” Eleanor glanced between her children for a moment, mystified. “Well, now that you’re here… Your father and I wanted to take you out to dinner. To celebrate!”

“Oh, that’s okay!” Maddy said quickly. “We really just want to go home.” …and fuck each other’s brains out.

“Nonsense.” Eleanor crossed her arms. “At least we’re getting a treat. How about Dairy Queen? Just like old times.”

Maddy groaned internally, something in her mother’s voice said there was no getting out of this. Somehow, she’d just have to find a way to resist jumping Elliot’s bones until they got home.

For a moment, brother and sister locked eyes. Elliot’s stare was intense, unblinking, like he was mentally undressing her all over again. Maddy bit her lip, giving him the best “come-and-fuck-me” eyes she could muster.

To Maddy’s surprise, Elliot winked. And just like that, her brother’s cock was all Maddy could think about again.

God, this is going to be a long night…

“I’m just so proud of you both,” Stephen said between mouthfuls of a chocolate sundae.

Maddy and Elliot shrugged in unison, sitting side-by-side in the booth opposite their parents.

“Thanks, Dad,” Elliot said.

“Are you okay, Elliot?” Eleanor asked. “You seem… distracted.”

Maddy grinned sideways at her brother, swirling her tongue dexterously around her ice cream. Elliot stared at her for a moment, open-mouthed, entranced by the tip of her tongue licking and swirling her vanilla ice cream. 

“Um, yeah, I’m fine. It’s just been a long day, y’know?” Elliot finally tore his gaze away from Maddy, managing a weak smile.

“Come on,” Stephen said to Eleanor. “Let the kids be. I’m sure they’re overwhelmed.”

“Well, shame on me for wanting to spend some quality time with my kids before they’re shipped off to who knows where! This could be our last major milestone all together, Stephen.” Eleanor’s voice suddenly reached a higher pitch that had several other tables sneaking looks over at the commotion. 

“Honey, it’s not gonna be like that.” 

“It very well might be!”

Maddy and Elliot shrunk back in their seats as their parents devolved into bickering. Some things never changed.

It was agony. Not the bickering, Maddy was used to that. What was torture was the fact that Maddy was sitting mere inches away from Elliot, when only half an hour ago he’d been inches deep inside Maddy. A part of her had thought that once she got what she wanted, these shameful incestual cravings would fade. But now, if anything, the feelings were stronger than ever.

Maddy let her hand drift under the table and rest on Elliot’s outer knee. To his credit, Elliot kept eating as if nothing was wrong. But below the waist, his muscles tensed, locking up as he processed his sister’s touch. So much power…

She flexed her fingers, letting them glide across her brother’s lap. Maddy was delighted to find Elliot’s cock already erecting a tent in his loose, basketball shorts, straining towards her touch. Elliot gulped. Oh, she was about to have so much fun with this.

The first thing Maddy did was wrap her hand around the stiffening shaft and squeeze. Hard. Elliot nearly choked on his ice cream as his cock was suddenly held in a vice-like grip of pleasure.

Of course, Eleanor picked this time to bring her attention back to her son.

“Have you thought any more about college applications, El?” Eleanor said, looking at Elliot sharply.

Maddy knew she should stop now. She knew masturbating her brother right in front of her parents was a bridge too far. But she couldn’t help it. Elliot’s cock was throbbing, Maddy could feel it even through the thick material of his jeans. It needed release. It needed her.

So, Maddy began to stroke the head of her brother’s cock through his shorts, keeping her eyes fixed on some distant point all the while, as if she was hardly paying attention.

“Eurgh,” Elliot half grunted, half moaned. “I-I told you, Mom. I’m taking a gap year.”

“I know you’re taking a gap year.” Eleanor frowned. “I’m asking about after that… It's called planning ahead.”

Maddy squeezed again, stroking the long, hard outline of Elliot’s cock with increased pressure.

“Uhfm…” Elliot looked down, his face turning red.

“Are you sure you’re feeling okay, Elliot? You look…” Eleanor trailed off, and suddenly Maddy’s heart seemed to skip a beat. What the fuck am I doing…

It took all her willpower, but Maddy yanked her hand away from her brother’s crotch, instead busying herself with draining the final dregs of her vanilla ice cream. Elliot’s hips bucked slightly at the absence, begging for Maddy’s hand to return. 

“I’m fine, Mom,” Elliot said. Then, he turned to his sister, a devious twinkle in his eye. “How are you doing, sis? You’ve barely said a word…”

The family’s eyes suddenly turned on her, and Maddy felt strangely vulnerable. Maybe it was the warm flush of arousal that she knew must be showing on her face. Maybe it was the way Elliot was fucking her raw with only a look. Or maybe it was the way her hard nipples poked through the thin fabric of her top. Whatever the case, Maddy was feeling thoroughly exposed.

“I need to go to the bathroom.” With that, Maddy suddenly stood and left, Elliot’s gaze boring into her backside as she walked away.

In the bathroom, Maddy splashed ice-cold water on her face. Get a fucking grip, Maddy. Teasing her brother had been all fun and games up until now, but now it was real. She didn’t just have to masturbate while fantasizing about her brother fucking her. She could actually get fucked by her brother. And that thought drove Maddy absolutely crazy.

“Keep your hands to yourself, Mads,” she told her reflection. “We don’t need Mom figuring out her kids are fucking.”

Maddy waited a moment longer to go back out, just until the throbbing in her pussy subsided a little. When it finally did, she turned to leave, only to stop dead in her tracks.

There stood Elliot, casually closing the door of the women’s restroom behind him.

“Hey, bro…” Maddy said, her heart suddenly hammering. “What are you doing?” 

“Just came to check on you.”

Maddy was keenly aware of the bulge that still pointed straight out beneath Elliot’s shorts. She struggled to keep her eyes off of it.

“I’m fine. I was just coming back out.” Maddy made to move past Elliot only for him to step in front of her, blocking away. 

They stared at each other for a moment, only inches apart. Maddy could feel her brother’s hot breath on her face.

Then, without a word more, brother and sister crashed together into a animalistic kiss.

Elliot’s hands immediately went to his sister’s ass, fingers squeezing that bubble butt hard enough to bruise. The forcefulness of his touch sent Maddy into a frenzy. She laced her fingers through his hair, grinding his face against her and depriving them both of oxygen. She needed him closer. She needed him to devour her.

In a flash, Elliot had Maddy pressed up against the bathroom sink, his hands still spreading and squeezing that perfect ass. Maddy let out a moan straight into her brother’s mouth as he thrust against her, friction sending delicious spasms of pleasure through her core. Only her panties, a pair of thin leggings, and Elliot’s shorts separated their naked bodies.

They stopped for breath, their eyes heavy with lust. And Elliot reached to pull down his shorts.

“W-Wait,” Maddy said, glancing at the door. “The door’s not locked.”

Elliot’s cock sprung free, the tip already glistening with pre-cum. “I don’t really care, Maddy.”

Maddy gasped as Elliot yanked her panties and leggings down in one fell swoop, then spun her around so she was facing the mirror. She bit her lip, hard, as Elliot’s cock pressed against her soaking entrance.

“What if…” Maddy stifled a moan as Elliot slowly thrust inside her, warm and hot and throbbing. “Oh, oh fuuuck! W-what if someone- fuck, comes in?”

On the other side of that bathroom door were not only Maddy’s parents, but half her graduating class. Any one of them could walk in at any moment to see Maddy getting railed by her brother… the thought almost made Maddy orgasm on the spot.

“Come. On.” Elliot punctuated each word with another thrust, burying his cock a little deeper in Maddy’s impossibly tight pussy with...