Locked in Lust

The wedding reception was a blur of noise and color, the banquet hall pulsing with life, glasses clinking, laughter cutting through a thumping dance track, and the faint hum of a hundred conversations.

Mia and Ethan had been the ones assigned into helping out during the whole ordeal, being siblings, they were the ones who always got stuck with the grunt work at family events like this, their mom knowing they'd grumble but get it done.

The two had always been a unit since they were kids, practically together through years of shared chaos, late-night video game marathons in the basement, sneaking snacks from the kitchen past midnight, and trading secrets no one else would get.

Even now, in their early twenties, they moved through the world like a matched set, finishing each other's sentences and sharing looks that said everything without a word.

Tonight, though, something felt different. Maybe it was the champagne they'd snuck from the bar earlier, or the way Mia's dress hugged her curves, wearing those tight leggings that catched Ethan's eye more than usual.

They'd been dodging the chaos of the dessert table setup when their mom, busy with a dozen tasks, waved them toward the storage closet down the hall.

"Mia, Ethan, grab more plates and glasses, quick! We're running low," she'd barked, barely looking up. They'd exchanged a glance, half-annoyed, half-amused and headed off, figuring it'd be a five-minute job.

Inside the closet, though, things shifted. The space was a claustrophobic mess, shelves stacked with towers of plates and delicate glasses, pressing them into a corner too tight for comfort. They hadn't noticed the door's faulty latch when they stepped in, too caught up in their usual banter, Mia teasing Ethan about his crooked tie, him flicking her hair.

But when Ethan tried the handle to leave, it stuck fast.

He jiggled it, then shoved harder, muttering, "Shit, Mia, we're trapped."

"What? No way" Mia said, squeezing past him to try it herself. Her elbow brushed his side, a familiar touch from years of crowding onto couches or piling into the backseat of their mom's car. But this time, in the cramped space, it felt different, her ass grazed his hips as she leaned forward, and a strange heat flared where their bodies met. She yanked at the handle, nothing. "Oh, come on," she groaned, turning around, only to find herself inches from his chest, her back pinned against a shelf. The reception's noise thumped faintly outside, but in here, it was just them, too close, too warm, the air heavy with their shared breath.

Ethan braced his hands on the shelf behind her, trying to give her room, but it only caged her in more. "Don't move," he growled, voice tighter than usual. His breath hit her neck, sharp and hot, and Mia's skin prickled. They'd always been physical with each other, wrestling over the last slice of pizza, her stealing his hoodies, him tossing her over his shoulder to make her laugh... but this was new.

His thighs pressed against hers, his chest grazing her spine when he shifted, and suddenly, every touch felt like it carried a weight they'd never acknowledged.

They were pressed impossibly close, pinned in a position that felt dangerously intimate, pressing Mia and Ethan into a space too tight for comfort.

"I'm trying, okay?" Mia snapped, but her voice wavered, unsteady. They were siblings, had shared a bathroom mirror growing up, fought over who got the front seat, and stayed up talking through every heartbreak. But now, jammed in like this, her heart was racing for reasons she couldn't untangle.

"This is so messed up," she muttered, trying to ground herself. "We're just supposed to grab plates."

"Tell me about it," Ethan mumbled, his tone strained.

"You're not making it easy, squirming like that."

His words hung there, and she felt it, the shift in his body, the hardness pressing against her through his pants. Her breath caught. They'd always been close, maybe too close, the kind of siblings who didn't think twice about crashing in the same bed after a late movie or slinging an arm around each other at parties. But this was a line they'd never crossed, a spark that shouldn't have been there.

"Don't move," Ethan growled, his voice taut as he braced his hands on the wall, boxing her in. His breath scorched her neck, and every shift of his body, his chest grazing her spine, made her hyper-aware of their predicament. Her leggings clung to her thighs, amplifying the heat where their bodies met.

"I'm trying, okay?" Mia snapped, but her voice shook, all wobbly. The way they were jammed in, her leaning forward a bit, him right up behind her, felt like something she'd never admit to imagining. Her skin was practically humming, her heart pounding as she wrestled with the wild heat building up.

"This is so messed up," she muttered, mostly to herself.

"We shouldn't be stuck like this." she added.

"Tell me about it," Ethan mumbled. "You're making it worse, you know." he replied.

Mia wanted to fire back, but damn, she could feel him, his tightly wound energy, his hips way too close for comfort.

They were brother and sister, but this was a spark begging to ignite, a whole new level, like a match just waiting to catch fire. She wiggled a bit, hoping to get some breathing room, but it only pressed her ass tighter against him. A rough, needy sound slipped out of him, and she went dead still, her breath catching. She shifted, trying to ease the pressure, but it only ground her against him. A low grunt escaped him, and she froze, feeling it, him, hard, straining through his dress pants.

"Ethan," she hissed, her voice shaky, trembling with a raw, almost orgasmic edge.

"I'm sorry" he said, voice tight. "It's just so warm."

The air thickened, heavy with a tension that made her thighs clench. She should've been mortified, should've taken a deep breath and snap out of that situation, but it was impossible, some crazy heat was tearing through her instead. Another sudden movement of many made Ethan's pants slowly drop to his knees.

She felt the change right away, the sudden warmth of his dick, accidentally free, brushing her leggings and nudging right up against her.

"Fuck," Ethan groaned, voice cracking with panic and hunger. "Mia, I didn't-"

"Oh my god, Ethan" she said softly.

Her voice shaky, not sharp. She wasn't mad, just... lost in it. Her body moved on its own, leaning back just a fraction, chasing that contact. The feel of him sent a tremor through her, losing sense of the little control she had left.

"We shouldn't be doing this," she murmured, her words quivering with need, "We're family..."

They stayed like that for a moment, breathing hard, the heat between them building slow and unbearable.

Her hands trembled as they drifted to her leggings, fingers catching the fabric. She didn't plan it, didn't think, just acted in a sudden rush.

With a quick tug, she tore the seam of her leggings, the rip loud in the cramped closet, exposing the thin pink panties underneath. Ethan's breath caught, his eyes locked on her in the dim light sneaking through the door's crack.

She hesitated, heart pounding, then moved fast, her fingers found him, hot and hard, and with a bold, reckless motion, she guided him right at her entrance, pushing the panties to the side.

The sensation hit like a wave, and she gasped, her voice low and orgasmic, a whispered:

"Fuck yeah..." slipping out as her body trembled against him.

"Mia..." he warned, but his voice was frail, his body leaning closer.

"I can't believe we're doing this," she murmured, half-moaning.

He pressed against her entrance, and the moment he slipped inside, his control broke.

He came instantly, a shuddering groan escaping as he grabbed her by the hips and tried to push as deep as he could possibly go, flooding her with overwhelming warmth. She gasped, her body clenching around him, her legs trembling.

"Fuck, Mia," he panted, voice raw. "I've always wanted to fuck you. I couldn't resist.- shit, I'm sorry."

"Oh my god," she moaned, but then he pulled back.

His cock slipping out until just the tip rested at her entrance, his load spilling slowly from her by the sides, thick white cum slowly gathered and slipped down her legs, staining the pink panties with his semen in the process.

She turned her head slightly, eyes glinting in the dark.

"You've always wanted to breed your little sister, didn't you?" she taunted, her with an erotic, and orgasmic tone.

The words hit him like a spark to gasoline. With a deep groan, he pressed her hips hard and sank back inside her, as deep as he could go, pushing leftover cum deeper than before, some splashing against her soaked pink panties still shoved to the side. The thought of making her pregnant, as wrong as it was, drove him wild, and in that very moment he didn't care about the consequences. Neither did she.

"Ohh fuckkk..... yeahh" she gasped loud then very soft, her hips rocking back to meet him, her voice in a whisper couldn't contain it.

"I want it. Fuck me harder Ethan, please."

He didn't hesitate. Gripping her hips, he thrust with a fast, brutal rhythm, the closet creaking as their bodies collided. Plates and glasses rattled on the shelves, some crashing to the ground, shattering into a million pieces upon hitting the floor. Her moans filled the space, shameless and raw, daring anyone outside to hear.

"Fuck, Ethan we're being too loud," she muttered, breathless as she cried his name in the cramped space.

"Let them hear," he said, his body shuddering as he kept going, relentless, heedless of the broken glass beneath them.

"I want them to know how deep i am inside my own sister" he added between thrusts.

After minutes of relentless pounding, their bodies slick with sweat in the cramped closet, he slowed just enough to catch her gaze, a hungry glint in his eyes.

He slid his hands down her trembling thighs, fingers brushing the damp fabric of her panties, already soaked with a mixture of semen and wetness.

He pressed on the fabric with his fingers, the wetness was so heavy that drops of semen slipped from the saturated material, as they fell to the floor with each deep thrust.

In a fast motion, he shifted her body, to face her fully, their bodies pressed front to front, face to face, her chest heaving against his.

Her hair was disheveled, her sweat-soaked forehead and face, her makeup streaking down her eyes and cheeks and lipstick smeared in a chaotic blur. The sight of her, so raw and disheveled, ignited something primal in him, his arousal surging. Instinct took over, he leaned in, capturing her lips in a fierce, desperate kiss.

For a fleeting moment, they froze, no movement, no thrusts, just their lips locked, eyes meeting in a haze of lust and shock.

The weight of what they were doing hit them, the wrongness of it pulsing in the silence. But then, another sudden wave of heat surged between them.

They dove back into each other, mouths crashing together, tongues tangling furiously as he resumed thrusting, their bodies moving like animals lost in instinct. Wanting to push further into her, he grabbed her leg and guided it upward, hooking it over his shoulder. The shift in position opened her up, letting him sink deeper, each thrust now striking a spot so precise it sent shudders through her core, her eyes rolling back as pleasure overwhelmed her senses.

They'd now been going at it for a few minutes, their bodies tangled and sweaty, him slamming into her with raw, hungry thrusts. Her gasps spilled out, wild and needy, as she rocked her hips to take him, fingers clawing at his shoulders. Her slick heat gripped him tight, stroking him just right, and he could feel that familiar ache building low, his cock throbbing as another load swelled up, begging for release.

She locked eyes with him as she leaned closer, voice low and dripping with heat.

"Is this what you wanted? To get your sister pregnant?--fill me up again" she purred, her words sharp and reckless.

"I don't care that we're blood related. Just cum inside your own sister like you've always wanted to." Her hips bucked harder, her dirty talk unraveling him as she moaned,

"Breed me, do it please" The thought sent a jolt through him, her shameless desire pushing him closer to the edge.

With a sudden urge, his dick released again, a strong feeling made him release load after load, an endless stream of cum inside her one more time. He let out a low growl against her neck as he spilled everything inside her pussy, the heat and closeness was too much to resist. Her own release crashed through, loud and unapologetic, her leg still slung over his shoulder as she shook against him.

Ethan couldn't stop, his thrusts kept going but reducing in pace after each one.

Few seconds later a third leftover release followed, with much lower pressure than the previous ones, her pink panties were now drenched in a mix of cum and sweat, clinging to her thigh as they moved.

The closet reeked of sweat and sex, their bodies pressed so tight they could barely breathe. Her torn leggings hung uselessly, her panties now a soaked mess. Ethan leaned into her, panting, his grip still firm on her thigh.

"I needed you so bad, i love you" he said, voice low before planting a deep kiss in her mouth.

"I cant believe we waited so long to do this" she said back, her voice shaky and her body still buzzing.

Their bodies still pressed close in the cramped closet, the air thick with the scent of their sex. She pulled back just enough to catch his eye.

"We gotta get out of here," she whispered, "before someone figures out what we've been up to."

Her fingers trailed down his chest, lingering at his waistband.

"I'm not done yet, so let's find somewhere else we can do this again." Mia added.

"My car's out in the back.", he replied.

His hand slid over her hip, giving a playful squeeze.

"Think you can walk straight enough to make it without raising eyebrows?"

She smirked, adjusting her leggings with a quick tug, her eyes glinting with mischief.

"I'll manage".

The door clicked open, finally giving way, the hallway was empty, the party's music and overall noise had masked the sounds of their incestuous sex.

As they left, the door behind them shut close, leaving only their secret locked in the closet. (and leaving pieces of broken glass and plates... but who cares about that... right?)