James had spent weeks in the school chemistry lab perfecting what he hoped would be the ultimate attraction formula. The skinny, glasses-wearing senior mixed compounds late into the evenings, convinced he could create a spray that would make any girl who caught its scent instantly crave him. After countless failed batches, he finally produced what he believed was the right formula.
That afternoon, he sprayed a generous mist across his neck like cologne and walked the school hallways with nervous excitement. Girls passed him without a second glance. No one approached, no one even seemed to notice. By the time the final bell rang, James had given up. The experiment had failed. He trudged home, shoulders slumped, ready to scrub the useless mixture off his skin.
He never made it to his apartment. As he entered the building lobby, he collided with his younger sister Jessie, who was returning from her afternoon classes. The impact was brief, but enough for the lingering spray on his neck to waft directly into her face. Neither of them noticed anything unusual. They apologized, laughed awkwardly, and went their separate ways.
That night, Jessie’s dream began the moment she closed her eyes.
In the dream, she was lying naked on her bed, legs spread wide. James stood at the foot of the mattress, his cock already hard and glistening. Without hesitation he climbed between her thighs and drove his length into her pussy in one smooth thrust. Jessie moaned as her walls stretched around him. Every inch of his shaft slid deep, the friction sending sparks through her body. He started fucking her with steady, powerful strokes, the head of his cock hitting her cervix with each thrust. She could feel every ridge, every vein, the way his balls slapped against her ass. Her dream-self wrapped her legs around his waist and begged for more.
James leaned down and kissed her hard, his tongue exploring her mouth while his hips kept their relentless rhythm. Jessie’s pussy clenched around him, dripping with arousal. She could hear the wet sounds of his cock sliding in and out of her soaked cunt. He fucked her faster, harder, until the bed creaked beneath them. Jessie’s climax built quickly; her inner muscles fluttered and then clamped down as she came, crying out his name. James didn’t stop. He kept pounding her through the orgasm, driving her higher until another wave crashed over her.
When he finally came, it was with a deep, guttural groan. Jessie felt the first hot spurt of his cum flood her pussy, thick and heavy. Pulse after pulse filled her, the warmth spreading deep inside. In the dream she knew his seed was reaching her womb, knew she was being bred by her own brother. The sensation was so vivid she could almost feel her belly already beginning to swell with his child.
Jessie woke with a gasp, her sheets soaked beneath her. Her thighs were slick with her own juices, her nipples stiff against her thin nightshirt. She lay there panting, the memory of the dream still burning through her body. All day the need only grew stronger. She couldn’t concentrate in class. Every thought circled back to one thing: she needed James to fuck her, to cum inside her, to fill her womb the way he had in the dream.
By evening Jessie had made up her mind. She waited until their parents left for their weekly date night, then slipped into James’s room wearing nothing but an oversized t-shirt that barely covered her ass. James sat at his desk, headphones on, still working on chemistry notes. Jessie walked up behind him and gently pulled the headphones off.
“James,” she said softly, her voice already husky, “I need to talk to you.”
He turned, startled to see her so close and so underdressed. “Jessie? What’s wrong?”
She didn’t answer with words. Instead she climbed into his lap, straddling him on the chair. Her bare pussy pressed against the growing bulge in his pants. James’s eyes widened. “Jessie, what are you—”
“Shh,” she whispered, grinding slowly against him. “I had a dream last night. You were inside me. You came so deep I could feel it. I woke up so wet I had to change the sheets.” She leaned in and kissed his neck, right where the spray had touched him the day before. “I need that to be real. I need you to fuck me, James. I need you to breed me.”
James tried to protest, but his body betrayed him. His cock hardened fully beneath her, pressing against her slick folds through his jeans. Jessie reached down and unzipped him, freeing his erection. She wrapped her fingers around the thick shaft and stroked him slowly, feeling it throb in her hand.
“I’m already dripping for you,” she murmured, guiding the head of his cock to her entrance. She sank down in one smooth motion, taking every inch inside her tight, wet pussy. Both of them moaned at the sudden heat and pressure. Jessie’s walls clenched around him, adjusting to his size. She began to ride him, rolling her hips in slow circles, then lifting and dropping in a steady rhythm.
James gripped her waist, torn between guilt and overwhelming pleasure. “Jessie… we shouldn’t…”
She silenced him by pulling her t-shirt off, revealing her small, perky breasts. Her nipples were stiff and pink. She guided his mouth to one and he sucked instinctively, tongue flicking over the sensitive bud. Jessie moaned louder, riding him faster. The wet sounds of her pussy sliding up and down his cock filled the room.
She leaned back slightly, changing the angle so his cock rubbed against her front wall with every thrust. Her clit dragged against his pubic bone. The sensation built quickly. Jessie’s breathing grew ragged. “James, I’m going to cum,” she gasped. Her pussy spasmed around him, milking his shaft as she came hard. Her juices coated his balls and dripped down his thighs.
James couldn’t hold back any longer. He stood up with her still impaled on his cock, carried her to the bed, and laid her down. He hooked her legs over his shoulders and started fucking her in earnest, driving deep with every stroke. The new position let him reach even farther inside her. Jessie’s eyes rolled back as he pounded her cervix with each thrust.
“Harder,” she begged. “Fill me up. I want to feel your cum in my womb.”
James’s pace became frantic. His balls slapped against her ass. The headboard banged against the wall. Jessie reached down and rubbed her clit in time with his thrusts, pushing herself toward another orgasm. When she came again, her pussy clamped down so tightly James groaned and thrust as deep as he could go. His cock pulsed, and thick ropes of cum erupted inside her. Jessie felt every spurt, hot and heavy, flooding her pussy and seeping into her womb just like in the dream.
They stayed locked together, panting. James’s cock remained half-hard inside her, still twitching with aftershocks. Jessie smiled dreamily, feeling his seed slowly leak out around his shaft.
But the need hadn’t faded. If anything, it had grown stronger.
She rolled them over so she was on top again. “I’m not done,” she whispered. “I need more. I need you to breed me until I can’t walk.”
She started riding him again, slower this time, savoring every inch. James’s hands roamed her body, squeezing her breasts, gripping her ass. Jessie leaned down and kissed him deeply, tongues tangling while her hips kept their steady rhythm. She could feel his cum inside her, making everything slicker, wetter.
James hardened fully again inside her. Jessie moaned at the sensation of him swelling and stretching her once more. She picked up the pace, bouncing on his cock with wet, obscene sounds. Her pussy squelched around him, cum and arousal mixing and dripping down his shaft.
This time when she came, it was with a scream. Her entire body shook, pussy convulsing around him. James followed seconds later, pumping another thick load deep into her already flooded cunt. Jessie collapsed on top of him, both of them breathing hard.
They spent the rest of the night in his bed. James took her in every position she asked for—on her back with her legs spread wide, on her hands and knees while he fucked her from behind, against the wall with her legs wrapped around his waist. Each time he came inside her, and each time Jessie begged for more, whispering how much she needed his seed, how she wanted to feel it dripping out of her for days.
By morning Jessie’s thighs were sticky with dried cum, her pussy swollen and sensitive from hours of use. She lay curled against James’s chest, finally sated for the moment, though she knew the hunger would return soon. For now, she had what she craved: her brother’s cum deep inside her, exactly where it belonged.
Months later, the apartment was quiet except for the low hum of the air conditioner. Their parents had left for another weekend trip, leaving James and Jessie alone again. Jessie stood in front of the full-length mirror in James’s room, now wearing nothing but one of his old button-up shirts. The fabric barely covered her round, swollen belly. Her hands rested on the curve, fingers tracing slow circles over the taut skin. She was five months along, and the pregnancy showed clearly—her breasts fuller, her nipples darker, her hips wider.
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