Jessica's breasts were full and round, spilling generously from the tight crop top she wore. Her nipples, hard and erect, strained against the thin fabric, begging to be freed. Her yoga pants clung to her every curve, hugging her hips and accentuating the outline of her throbbing cock. It was a monstrous size, clearly visible through the tight fabric, and perpetually semi-erect, causing a noticeable bulge.

"Fuck, I can't take much more of this," she moaned, her voice husky with desire. "Twelve days with no release... I'm so close to breaking." Her voice carried a hint of frustration, a clear sign of her internal struggle. Jessica was under medical scrutiny—her body was being studied for her unprecedented semen production. The doctors had requested she abstain from any sexual release for two weeks to collect a substantial specimen for analysis. A simple request, but an incredibly challenging task for the voluptuous futanari.

Her cock, always a generous size, had grown even larger during her denial, making it nearly impossible to find clothing that could conceal it. The constant state of arousal left her leaking copious amounts of pre-cum, soaking through her leggings every few hours, and forcing her to forgo panties altogether. The tight fabric of her yoga pants provided little relief, hugging her swollen shaft and balls, accentuating her predicament.

"I can't even remember the last time I was fully hard," she whispered, her eyes closed as she imagined the feeling of freedom her cock craved. It had been days since she'd even attempted to get an erection, fearing the discomfort of her restrained state. The medical study had become her own personal torture, and yet, she found a strange pleasure in the denial.

As she shifted on the sofa, her massive cock twitched, the sensitive head rubbing against the soft fabric, providing a teasing stimulation that only added to her frustration. Jessica bit her lip, her breathing becoming shallower as she imagined what it would be like to finally surrender to her desires. But with one day left until the study concluded, she knew she had to hold on just a little while longer.

Nicky entered the lounge, his lithe frame clad only in a pair of boxer shorts. His slim body moved with a natural grace, an unconscious seductiveness that belied his gender. He had the face of an angel, with delicate features and large, expressive eyes that spoke of his youth and innocence. Shoulder-length hair, soft and wavy, framed his face, accentuating his feminine beauty.

Jessica couldn't help but bite her lip as she watched her younger brother. He had always possessed an feminine appeal, but after twelve days of her own denial, he appeared even more girl-like. His slender figure, accented by the loose shorts, only further fueled her forbidden fantasies. She imagined him as a slim, little slut, desperate to have his mouth filled by her throbbing cock.

As Nicky moved into the open-plan kitchen, rummaging in the fridge, Jessica's eyes were drawn to his lithe body. His shorts hung low on his hips, teasingly revealing a glimpse of his smooth, hairless thighs. The thin fabric clung to his slight bulge, hinting at his modest manhood, but doing little to conceal the swell of his ass.

Jessica's breath quickened, her cock twitched and throbbed, straining against the confines of her yoga pants. Despite her denial, it had risen to full hardness—a testament to her pent-up lust and the magnetic allure of her brother. She could feel a bead of pre-cum forming at the tip, a reminder of the torrent of release that was to come.

"Ugh, nothing good in here," Nicky groaned, shutting the fridge door and turning back towards the living room. Jessica's eyes followed his every move, her sisterly affection long overshadowed by her carnal cravings. She imagined him on his knees before her, his delicate lips wrapped around her shaft, his innocent eyes looking up at her with a mixture of curiosity and desire.

"Whatcha thinking about, big sis?" Nicky's voice suddenly cut through her fantasy, bringing her back to the present. She blinked, realizing she'd been staring, her eyes hungry and her face flushed with arousal. "You're, um, you're looking a little flushed," he added, his brow furrowing with a mix of concern and curiosity.

Jessica's face flushed a deeper shade of crimson as she realized she'd been caught staring. Her gaze dropped guiltily, her heart pounding in her chest. "I-I... God, you know how I can't..." she stuttered, her voice trailing off as she gestured down at her throbbing cock, straining against the fabric of her yoga pants.

"Hey, it's cool," Nicky said, waving a dismissive hand. "I know, the whole no-release thing for your, uh, condition." He offered a playful grin, his innocence shining through. "You're getting a little sweaty, big sis. You okay?"

Jessica bit her lip, her eyes darting around as she struggled to find the words. "I-it's worse than you think," she finally blurted out, her voice thick with desire. "I can't stop thinking about it. I need... I need some relief." She paused, her eyes flicking up to meet his, a silent plea shining in their emerald depths. "Please, Nicky, would you mind wearing more clothes? Just... just until I can get a handle on this?"

Nicky's brow furrowed, his eyes widening as he took in his sister's distress. "You're serious?" he asked, his voice laced with disbelief.

"Yes," Jessica whispered, her eyes closed as she nodded. "Please, baby bro..."

Before Nicky could respond, Jessica shifted, spreading her legs slightly to give him a clear view of her straining cock. The tight fabric of her yoga pants outlined every inch of her hardness, the pre-cum leaking from the tip staining the material.

Nicky's eyes went wide as saucers, his mouth forming a silent 'o' as he took in the sight. It took him a moment to find his voice. "Wow," he breathed, his gaze fixed on the impressive bulge. "I guess it's been a while, huh?"

Jessica opened her eyes, her cheeks still flushed, and nodded mutely, unable to speak past the lump in her throat.

A playful grin spread across Nicky's face as he eyed his sister's predicament. "Who would've thought I'd be the cause of that?" he teased, a mischievous glint in his eye. "You must be desperate if little ol' me is getting you all worked up." He laughed, a light, carefree sound, oblivious to the effect his words were having on his sister.

Nicky's grin widened more as he saw the impact of his words on his sister. "Wow, Jess, it's like you're a ticking time bomb, ready to go off at any second." He took a mock step back, holding up his hands in faux surrender. "Don't explode on me, big sis! I don't think I could handle that kind of mess."

Jessica's cheeks burned with a mix of embarrassment and desire. She shifted uncomfortably on the sofa, her cock throbbing relentlessly against the confining fabric. "Nicky, please, just stop," she begged, her voice thick with need. "Just... just put on some more clothes. It's driving me crazy."

"Aww, is big sis getting a little hot and bothered?" Nicky teased, taking a deliberate step closer, his eyes never leaving the impressive bulge between her legs. "I didn't realize I had such an effect on you, Jess. Maybe I should start charging."

Jessica's eyes widened, the hurt evident in her gaze. "That's not fair, Nicky," she said, her voice carrying a note of pain. "You know how I feel about you. You're my little brother, for God's sake. I shouldn't even be having these thoughts, let alone having to beg you to help me control them."

Nicky's expression softened for a moment, the cockiness fading as he took in the raw emotion on his sister's face. But then, as if remembering their roles, his features hardened once more, and he straightened, a challenging gleam in his eye. "So, what are you gonna do about it, huh? Gonna lock me in my room and force me to cover up?"

Jessica bit her lip, the conflict evident in her eyes. "I'm asking you, Nicky, as your sister, to please just wear something more... modest," she said, her voice strained. "You're killing me here."

"Or what?" Nicky challenged, his eyes narrowing. "You'll spank me? Ground me? Come on, Jess, we're both adults here. You can't just boss me around anymore."

"You're enjoying this, aren't you?" Jessica accused, her frustration mounting. "You're getting off on seeing me like this, teasing me, winding me up."

Nicky smirked, his eyes flicking down to her straining cock. "Well, I can't say it's not entertaining. I mean, when was the last time you actually got off? It's gotta be killing you, all that pressure building up with nowhere to go."

"Stop it!" Jessica cried, her eyes pleading. "Just stop, Nicky, please. I'm begging you."

But Nicky seemed impervious to his sister's distress, his smirk only widening as he continued to taunt her. "Make me," he dared, his voice low and challenging. "What are you gonna do, big sis? You can't handle a little harmless fun? Maybe you just need to blow off some steam. Literally." He laughed at his own joke, his eyes flashing with a mixture of mischief and a hint of something darker.

Jessica's eyes flashed with a mixture of anger and desire as she snapped. "Make you?" she repeated, her voice low and dangerous. Her brother's taunting had pushed her past her breaking point. With a growl, she lunged forward, her strength fueled by her heightened arousal. Nicky, caught off guard, stumbled backward, his eyes widening as he found himself easily overpowered.

In an instant, Jessica had him pushed down to his knees. He struggled against her grip, his protests muffled by the hand she clamped over his mouth. With her free hand, she quickly grabbed the waist of her yoga pants, freeing her enormous cock. It sprang forth, a full foot of throbbing, veined hardness, leaking pre-cum like a faucet.

"Is this what you wanted, baby bro?" Jessica spat, her voice thick with lust. "You want me to break?" Nicky's eyes went wide as he took in the sheer size of her cock, his struggles intensifying as he realized the seriousness of the situation.

"N-no, Jess, stop!" he begged, his muffled pleas falling on deaf ears.

Jessica's face was a mask of pure, primal desire. "Open your mouth," she commanded, her voice leaving no room for argument.

Nicky shook his head frantically, his eyes pleading, but Jessica was beyond reasoning. With a growl, she thrust her hips forward, her cock smacking against Nicky's cheek and causing him to whimper. "Do it!" she snarled, her hand still covering his mouth. "Unless you want me to paint your face with my load right now."

Nicky's eyes widened further, his struggles weakening as the reality of the situation sunk in. Slowly, reluctantly, he nodded, his eyes never leaving the throbbing cock before his face.

Satisfied, Jessica removed her hand from his mouth, watching as he parted his lips, a mix of curiosity and fear flashing across his face. "Suck it," she ordered, her voice hoarse with need. "Suck it like a good little slut, or so help me, I'll punish you."

Tentatively, Nicky parted his lips, his breath warm against the sensitive head of Jessica's cock. His eyes were wide, a mix of trepidation and curiosity shining in their depths. Slowly, with a hesitant movement, he leaned forward, his soft, pink lips enveloping the bulbous head.

Jessica moaned, her eyes rolling back slightly as she felt the warmth of her brother's mouth. "Fuck, baby bro, that's it," she groaned, her hands tightening on his shoulders as she gently began to thrust her hips. "You're gonna be such a good little cock sucker for me, aren't you?"

Nicky whimpered, the sound vibrating around her shaft as he took her in deeper. His soft tongue teased the sensitive underside of her cock, sending shivers of pleasure down her spine. "Mmm, that's it, use that little tongue. You know you want to. You've been teasing me for days, dress like a little slut, walking around half-naked. You were asking for this, baby bro."

Nicky made a slight gagging noise as Jessica's cock hit the back of his throat, but she paid it no mind, continuing her slow, deliberate thrusts. "Relax your throat, baby, take me deeper. I know you can. Such a good little cock sleeve for big sis," she cooed, her voice thick with desire. "It's all your fault, you know. If you hadn't been such a little tease, I wouldn't have had to do this. But now that I've started, I don't think I can stop."

Her hands moved from his shoulders, tangling in his soft hair as she began to guide his head with a firmer touch. "That's it, take it all," she moaned, her hips moving in a steady rhythm as she fucked his mouth. "You're gonna get a face full of my cum, baby bro. And you're gonna swallow every drop like a good little slut."

Nicky's eyes watered slightly as he struggled to accommodate her size, but Jessica was relentless, her arousal clouding any sense of restraint. "You like that, huh? Being forced to take my big cock? Knowing that I'm gonna unload down your throat, mark you as mine?"

Nicky whimpered again, his hands balling into fists as he submitted to her dominance. Jessica smiled, a wicked grin spreading across her face as she felt his resistance fade. "That's it, baby, give in to it. You can't fight it anymore. You're mine now, my personal cock sleeve, and I'm gonna use you whenever I want."

With a firm grip on his hair, she began to thrust harder, faster, the slap of flesh against flesh filling the room. Nicky's eyes were squeezed shut, his lips stretched around her shaft as he silently surrendered to her demands. "Oh yes, baby bro, just like that," she groaned, her breath coming in ragged gasps. "Take it, take all of it. It's your fault I'm like this. You drove me to this, and now you're gonna take my load."

Nicky could only whimper in response, his throat working around her cock as she used his mouth to fulfill her denied desires. Jessica's breath quickened, her eyes falling shut as she surrendered to the pleasure. "That's it, baby bro," she moaned. "Take your punishment. It's all your fault, and I'm gonna make you pay."

Jessica's eyes widened as she felt the coil in her abdomen tighten. "Oh fuck, baby bro, I'm close," she panted, her hips stuttering as she fought to hold back the tide of release.

Nicky, sensing her impending orgasm, tried to pull away, his eyes wide with fear. But Jessica was having none of it. With a snarl, she tightened her grip on his hair, forcing her cock even deeper down his throat. Nicky choked, his eyes watering as he was completely overwhelmed by her size.

"Swallow it all," she growled, her voice thick and animalistic. "You're my cum dumpster now, baby bro. Take it all and ask for more."

With that, she began to cum. Her back arched, her head thrown back as she unleashed load after load of thick, creamy semen down her brother's throat. Nicky gagged and sputtered, his body convulsing as he tried to handle the sheer volume. But it was too much, too fast, and he began to choke, his eyes bulging as he desperately tried to breathe.

Jessica, lost in the throes of her orgasm, showed no mercy. She held her brother's head in place, her hips pumping wildly as she unleashed a torrent of cum into his mouth. Nicky's eyes rolled back, his face reddening as he struggled to inhale, the slick fluid leaking from the corners of his mouth.

Finally, as if waking from a trance, Jessica pulled her cock from his mouth with a wet pop. Nicky immediately began to cough and splutter, his hands flying to his throat as he tried to catch his breath. But Jessica's release wasn't over. Her cock, still spurting ropes of cum, continued to decorate his face, his hair, his body, and the floor beneath them.

Nicky sputtered and coughed, cum dripping from his lips and coating his fingers as he tried to catch his breath. Jessica's eyes drank in the sight, her chest heaving as she rode the waves of her climax. Her brother, once so pristine and innocent, was now a mess of semen, his face covered, his hair sticking to his skin, his body glistening with her release.

The intensity of her orgasm finally began to ebb, leaving Jessica panting. She looked down at her brother, her expression softening as she took in the sight of him, no longer the teasing young man, but now a testament to her denied desires.

Nicky, still catching his breath, looked up at her, his eyes dazed and unfocused. His chest rose and fell rapidly, his throat working as he swallowed, his body covered in a slick, sticky layer of cum.

The room was filled with the sound of their heavy breathing and the occasional wet cough from Nicky as he continued to recover. Slowly, the reality of what had just transpired seemed to dawn on them both. Jessica's expression softened further, a mix of guilt and lust flickering across her face.

Nicky, for his part, said nothing, simply stared up at his sister, his eyes unblinking.

Trembling, Jessica ran her hands through her hair, her eyes flitting between her still-hard cock and her brother's cum-covered body. "Not enough," she breathed, her voice hoarse. "God, Nicky, I'm still so hard. I need more."

Nicky, perhaps sensing her intent, glanced fearfully toward the door, but Jessica was quicker. With a leap, she was on him, forcing him to the ground and wrestling him into submission. Nicky cried out, his protests muffled by the lingering cum in his throat as she flipped him onto his stomach, his face pressed against the cum-splattered floor.

"No, Jess, stop!" he begged, his voice thick and garbled. "Please, I can't take any more."

But Jessica was beyond reason. Her eyes blazed with a mixture of lust and frustration as she ripped at his boxer shorts, tearing the thin fabric away and exposing his tender ass. She straddled his thighs, her hands pinning his wrists to the floor above his head as she positioned herself at his entrance.

Using her copious cum as lubrication, she scooped up the thick fluid from the floor and Nicky's body, smearing it over her still-hard cock. Nicky squirmed beneath her, his breath coming in short, panicked gasps as he felt the tip of her cock press against his virgin hole.

"Please, Jess, don't!" he pleaded, his voice desperate. "You're too big, it'll hurt, please—"

But Jessica's need drowned out his protests. With a savage thrust, she buried herself to the hilt inside him. Nicky howled, his face twisting in agony as he was impaled on her massive cock. Jessica threw her head back, a guttural moan escaping her throat as she savored the feeling of her brother's body clutching at her shaft.

"God, yes!" she cried, her voice hoarse with need. "I'm gonna fuck you raw, baby bro! Gonna break you in and make you my little bitch!" She began to pound into him with abandon, her eyes rolling back as she lost herself in the sensation. "Take it, take my cock! I'm gonna split you open and fill you up, make you feel what it's like to be really fucked!"

Nicky screamed, his cries echoing off the walls as Jessica showed no mercy. Her powerful thrusts drove him forward, his face grinding against the floor, his body trembling with each invasion.

"That's it, take it all!" Jessica panted, her hands bruising his wrists as she held him in place. "You're mine now, my little fuck toy! I'm gonna breed that tight hole and mark you as mine!"

Nicky's screams turned to incoherent wails as his body was overwhelmed by the intensity of the assault. Jessica's cock, still sensitive from her earlier release, throbbed with each thrust, her balls slapping against his tender skin.

"You like that, baby bro?" she taunted, her breath hot against his neck. "You like being taken like a bitch? Should've thought about that before you teased me, dressed like a little slitch! Now take your punishment!"

Her pace quickened, her hips slamming against his, driving herself as deep as physically possible with each thrust. Nicky's body shook with each impact, his screams dying down to pitiful whimpers as he lost the strength to fight back.

With a vicious tug, Jessica yanked Nicky's hair, grinding his face into the cum-covered floor. "Lick it up, you little slut," she snarled, her hips still pounding into his tiny frame. "Clean up my mess while I tear your ass apart!"

Nicky's face twisted in humiliation as he obediently extended his tongue, lapping at the mixture of her cum and the sweat that had dripped from her body. Jessica's mouth fell open in a silent scream as the sensation shot straight to her cock, still buried balls-deep in his ass.

All 12 inches of her cock felt like it was tearing Nicky apart as she slammed into him without restraint. His face was pressed firmly into the floor, his body shaking with the force of her thrusts. Jessica's hands tightened in his hair, using it as leverage to pull back and then slam forward with even more force.

As Nicky whimpered, his body reacting involuntarily to the relentless stimulation, Jessica's skilled fingers found his neck, squeezing and leaving nail marks as she pressed him further into the floor. "That's it, baby bro," she purred, her voice hoarse. "Take it, take all of it. You can't even handle my cock, can you? My little brother's a useless cock sleeve."

Nicky's muffled whimpers only fueled Jessica's desire. Her eyes widened as she felt her own pleasure building, her brother's body gripping her cock like a vice. She leaned forward, her breath hot against his ear as she whispered, "You like that, don't you? My big cock owning your tiny hole. And look, your little cock's getting hard."

"No!" Nicky protested, his voice thick with shame. "I-I'm not, please, stop, it hurts, you're too b-big!"

Jessica chuckled darkly, the sound sending shivers down Nicky's spine. With a powerful thrust, she lifted him slightly off the floor, driving herself even deeper. "Liar," she breathed, her lips brushing against his ear. "Your cock's throbbing, baby bro. You like being dominated by your big sister, don't you? You tight little hole feels so good around my cock, doesn't it!"

Nicky squirmed, unable to deny the stirrings of desire in his own body. Jessica's relentless fucking, combined with her cruel words, had sparked a fire in his loins that he couldn't extinguish.

Sensing his hidden arousal, Jessica laughed, the sound sinister and amused. With a powerful tug, she wrenched Nicky onto his back, her cock never leaving his ass, his legs spread wide by her sides. She froze for a moment, taking in the sight of his tiny cock, throbbing and leaking pre-cum despite his protests.

"Look at that," she taunted, her fingers wrapping around his shaft and giving it a rough jerk. "Your little cock can't lie, baby bro. It wants me just as much as I want you."

Nicky whined, his body arching as he tried to squirm away from her touch. But Jessica held him firmly in place, her hand pumping his shaft with a punishing grip. "Come on, baby bro, let's see that cute little cock of yours get nice and hard for me," she goaded, her hips never ceasing their ruthless invasion of his ass. "You want me to breed your hole, don't you?"

Nicky shook his head furiously, tears pricking at the corners of his eyes as he struggled to deny his body's betrayal. But Jessica was relentless, her fingers tight around his shaft, twisting and tugging with cruel expertise. "Don't lie to me," she snarled, leaning down so their eyes were locked. "I can feel how much you want this. Your tight little hole is clenching around my cock, begging for my load."

Nicky sobbed, his chest heaving as he surrendered to the feelings raging within him. Jessica smiled, her thumb swiping at the bead of pre-cum that formed at the tip of his cock. "That's it, baby bro," she crooned, smearing the slick fluid over his sensitive head. "Let go. I want to see you lose control. Beg me to breed you."

Nicky's body arched, his eyes squeezing shut as the pleasure built. "J-Jess, I'm gonna—I'm gonna cum!"

"No, you're not," Jessica snarled, her hand tightening around his shaft, intentionally ignoring the spot that would give him relief. "Not until you admit that you're my cock sleeve, to be fucked and bred whenever I want."

Nicky whimpered, his body shaking as he hovered on the edge. "P-please, Jess, I can't hold it—"

"Say it!" she demanded, giving his cock a harsh tug. "Say you're my personal fuck toy!"

"I'm y-your cock sleeve!" Nicky cried, his voice breaking. "To be fucked and bred! Please, I'm gonna cum!"

"Good boy," Jessica purred, her thumb tracing the sensitive slit of his cockhead. "Now, cum for me."

With a few quick, rough strokes, she sent Nicky over the edge. He cried out, his body convulsing as he orgasmed, his cock spurting rope after rope of cum onto his already sticky body. But Jessica didn't stop. She continued to jerk him through his orgasm, ignoring his cries of sensitivity.

"Please, Jess, stop!" Nicky begged, his voice hoarse and raw. "It's too much, my cock's too sensitive!"

But Jessica just laughed, a cruel, dark sound that sent shivers down Nicky's spine. "Sensitive, huh?" she said, her eyes flashing with a dangerous light. "Let's see how sensitive you really are."

She released his cock, moving her hand to palm the sensitive head. With a firm grip, she began to massage the tip, her thumb rubbing circles on the slit as she continued to thrust into his ass.

Nicky wailed, his hips bucking uncontrollably. "It hurts! It's too much, Jess, please—"

Jessica just laughed again. "You don't like it?" she teased, her fingers tightening around his cockhead, squeezing and massaging the slit. "It's so cute when you squirm."

Nicky's breath caught in his throat as the sensation became too much. His body, still reeling from his orgasm, couldn't handle the direct stimulation. With a cry, he began to squirt, his cock shooting streams of clear fluid as Jessica teased the sensitive tip.

"Oh, fuck!" Jessica exclaimed, her eyes widening at the sight. "You're a squirter, baby bro? That's hot as hell!" She quickened her pace, her cock slamming into his ass as she kept up the relentless stimulation of his cockhead.

Nicky's body convulsed, his back arching as he cried out wordlessly. His ass clenched around Jessica's cock, his body reacting instinctually to the intense sensations. "That's it, baby bro," Jessica breathed, her thumb working his slit with expert precision. "Let it go. Squirt for me, you little slut."

Nicky's cries echoed through the room, his body showering himself and his sister with his release. The clear liquid coated his body, mixing with the remnants of Jessica's cum, as he squirmed and writhed in a pleading attempt to escape the overwhelming stimulation.

Jessica's eyes drank in the sight, her breath coming in ragged gasps as she watched her brother's body twitch and spasm. "That's it, baby bro," she moaned, her own orgasm building again. "Drench yourself for me. Show me how sensitive you are."

Nicky's body continued to betray him, sending wave after wave of clear fluid spraying from his cock as Jessica's fingers worked their magic. His ass clenched rhythmically around Jessica's cock, the feeling of his body's involuntary reactions only adding to her pleasure.

Jessica's eyes widened as she felt her orgasm approaching yet again. "Nicky, baby, I'm gonna cum!" she warned, her voice hoarse and desperate. "My cock's gonna explode, and I'm gonna fill that tight hole of yours to the brim!"

Nicky, his senses overwhelmed, could only whimper in response. Jessica showed no mercy as she pounded into him, her hips moving with primal need. "Here it comes!" she cried, her breath hot against his neck. "Take it, take all of me!"

With a savage roar, Jessica unleashed her pent-up load. Nicky cried out, his eyes widening as he felt her cock swelling inside him. He could feel her cum, thick and hot, pumping into his body, filling him up. The force of her release was almost too much, pushing him forward, but Jessica's strong grip on his hips held him in place, her cock buried deep in his ass.

"Fuck!" Jessica moaned, her whole body trembling as wave after wave of cum rushed through her cock. "I'm breeding you, baby bro! Taking that tight hole and marking it as mine!"

Nicky's breath caught in his throat as he felt himself being stretched to the limit. Jessica's cock throbbed with each pulse, shooting her thick load deep inside him. The sensation was overwhelming, the sheer volume of her cum making him feel full to bursting.

Jessica's fingers dug into his hips, her nails biting into his skin as she rode out her orgasm. "So full," she panted, her voice a mixture of wonder and lust. "My cock's owning your ass, baby bro. Taking every inch of me."

Nicky whimpered, his body shaking as the intensity of her release sent him spiraling into darkness. Jessica felt his body going limp beneath her, his ass still clenching around her cock as he began to fade. "No, stay with me, baby," she gasped, her hands moving to his shoulders, holding him in place as she continued to thrust. "Feel me breed you, feel my cock pumping you full!"

Nicky's eyes drifted closed as his mind succumbed to the blissful release. The world around him melted away, leaving only the sensation of his sister's cock throbbing inside him, her fingers digging into his skin.

Jessica's pace became frantic as she neared the end of her climax. "Come on, baby, stay with me," she urged, her hips slamming against his, her cock twitching with the last few spurts of cum. "I'm almost done, just a little more..."

Nicky's breaths were shallow, his body limp and obedient beneath her. Jessica's cock, still sensitive from her powerful orgasm, twitched with aftershocks, sending little pulses of pleasure through her as her balls finally emptied.

As Nicky slipped into unconsciousness, Jessica's body stilled, her cock finally softening and slipping from his well-used hole.

Jessica stood up, her body still humming with satisfaction. She looked down at Nicky, her smirk growing as she took in the sight of her baby brother. He lay on the floor, his body spent and limp, his ass stretched around her cock as it finally slipped free.

Nicky's body was a wreck, his limbs splayed in a boneless heap. His face, pressed against the floor, shone with the mixture of Jessica's cum and his own sweat. The evidence of her dominance was clear, and the sight of it made her clench go weak at the knees.

She ran her eyes over his delicate features, the soft curve of his jaw, and the long lashes that brushed his cheeks as he slept. Her gaze traveled down, taking in the bruising on his wrists where she had held him down, and the marks her nails had left on his neck. Her handiwork was clear, and the knowledge of it made her core clench with satisfaction.

But it was the sight of his ass, pink and puffy from her relentless fucking, that really made her smile. It was an image she had fantasized about countless times, and now it was a reality. Her baby brother, used and satisfied, his hole stretched and filled with her cum.

"You're mine now, baby bro," she whispered, her voice hoarse with satisfaction. "My personal fuck toy. And this is just the beginning."

Nicky, his body exhausted from the intense experience, remained motionless, only the rise and fall of his chest indicating that he was still alive. Jessica's smirk softened as she looked at him, her gaze affectionate despite the circumstances.

"Get some rest, baby," she murmured, her hand gently brushing his hair away from his face. "We've got plenty of time to continue this later."