She found the files on his laptop by accident, a folder labeled "audio only" full of raw recordings where a guy grunted filthy commands at his sister while she begged for his dick. The voices were amateur, heavy breathing and wet sounds filling the speakers. When she confronted him that night, he didn't deny it. Instead he pulled her close and said, "You want the real thing or you just gonna listen like a little pervert?"
Her answer was yanking his zipper down. His cock sprang out thick and already leaking. She dropped to her knees right there in the living room and wrapped her lips around the head, sucking loud and sloppy the way the recordings always described. He grabbed her hair and fucked her throat, telling her exactly how their mom would lose her mind if she walked in.
They moved to his bedroom and he set his phone to record. "Incest sex stories in audio start now," he growled, pressing record. She stripped and climbed onto the bed, spreading her legs so the mic caught every slick sound as he buried his face between her thighs. He licked her cunt like he was starving, tongue pushing deep, then sucking her clit until she moaned loud enough to be picked up clearly.
"Fuck your sister," she panted, pulling him up. He slammed into her in one thrust, the wet slap loud and nasty. The phone caught every word. "Harder, big brother.
Pound this pussy like you own it." He did, hips snapping, balls slapping her ass with each drive. Sweat dripped, skin smacked, and she came hard around his cock, cunt pulsing and squeezing.
He flipped her onto all fours and kept recording. "Tell the mic what you are," he ordered, voice rough. "I'm your dirty incest slut," she gasped as he drove back in. He fucked her faster, one hand reaching under to rub her clit while the other held the phone closer to where they joined. The audio picked up the squelch of her soaked pussy and her broken moans every time he bottomed out.
When he pulled out and shoved his cock back into her mouth, she tasted herself and sucked greedily. He came with a guttural groan, thick ropes shooting down her throat while she swallowed and moaned around him. They stayed like that until the recording stopped, breathing heavy, bodies slick.
Later they listened to the file together. Her hand stroked him back to hardness while the playback echoed their own filthy words. Round two started with the phone recording again, her riding him reverse so the mic caught every wet slide and the way she begged for his cum inside her this time. He gave it to her, pumping deep until it leaked out around his cock, the audio capturing the messy drip and their satisfied curses.
They kept the files. Every night after that they added another chapter, raw and unfiltered, turning their own incest sex stories in audio into something they could replay whenever they wanted.
