They found each other on Tumblr through a broken 404 link. Jake clicked the old tag and landed on his sister's secret account instead. Her posts were raw: brother sister fuck sessions described in filthy detail, pussy stretched and dripping cum. He recognized the words. They matched the way she used to moan his name when they were drunk and alone.

The next night she came home late. The apartment was quiet. She stripped in the living room without turning on the lights, knowing he was watching from the hallway. Her tits bounced free. Her shaved pussy already glistened. "You saw the posts," she said, voice flat and direct. "You want it for real."
Jake stepped forward and grabbed her hips. He shoved two fingers straight into her cunt. She was soaked. "This pussy is mine tonight," he growled. He pumped her hard, thumb grinding her clit until her legs shook. She came fast, juice running down his wrist.
He bent her over the couch arm. No teasing. He yanked his cock out and slammed it balls-deep into her tight hole in one thrust. She cried out but pushed back, taking every inch. He fucked her like an animal, hips slapping loud and wet. Her pussy clenched and squirted around his shaft on the second orgasm. He didn't slow down.
"Fill me," she begged. "Dump that load in my cunt." Jake gripped her ass and pounded harder until his balls tightened. He buried himself to the root and unloaded. Thick ropes of cum flooded her pussy, overflowing and dripping down her thighs. He stayed inside, rocking slow, pushing the mess deeper.
They moved to the bedroom. She got on all fours. He spread her cheeks and watched his cum leak from her swollen slit. He slapped his cock against her ass then drove back in. The wet squelch was obscene. He reached under and rubbed her clit while he fucked her. She came again, screaming into the pillow, pussy milking him.
Jake pulled out and flipped her onto her back. He pushed her knees to her chest and speared her again. Her tits bounced with every brutal thrust. He leaned down and sucked a nipple hard while his cock bottomed out. She clawed his back. "Harder. Ruin my pussy." He gave it to her, sweat dripping, balls slapping her ass. When he came the second time he stayed deep, grinding his load into her until it overflowed around his shaft.
They didn't stop. She rode him next, grinding her cum-filled cunt on his cock, tits in his face. He sucked and bit while she used him. Her third orgasm made her shake and squirt again, soaking his stomach. He flipped her onto her stomach and took her from behind once more, pounding until he pumped a third load inside her.
By morning her pussy was red, puffy, and leaking his cum every time she moved. They lay tangled, breathing hard. She reached down and scooped some of the mess onto her fingers, then licked them clean while staring at him. "Tumblr got nothing on the real thing," she said.
He pulled her close and shoved his fingers back into her sloppy cunt. "We’re not done yet."