He slammed the laptop shut after reading the latest post on the site, his cock throbbing hard against his jeans. The story was filthy, exactly what he needed: a brother pinning his sister down, whipping her ass raw before ramming his dick into her tight cunt while she begged for more. But tonight it wasn't fantasy. His stepsister Lena was staying over, and they both knew what was coming.
Lena walked in from the kitchen wearing nothing but a thin tank top and panties. "You on that site again?" she asked, voice low and rough.
She knew about his habit. They had talked about it once after too many drinks, admitted the taboo pull, the need for pain mixed with the forbidden family shit.
"Strip," he ordered, standing up. No slow build. He grabbed her by the hair and yanked her toward the bedroom. She gasped but didn't fight, her nipples already hard under the tank top. He ripped it off, then shoved her face-down on the bed. "You want the rough shit from those stories? You get it tonight."
He pulled the belt from his pants and cracked it across her ass. The sound echoed sharp. Lena cried out, ass cheeks reddening instantly. He hit her again, harder, watching the welts rise. "Count them, slut."
"One," she moaned. "Two. Fuck, harder." By ten her ass was striped and she was grinding her soaked panties into the mattress. He yanked them down and shoved two fingers straight into her dripping pussy. She was dripping wet already, clenching around him like she needed it brutal.
He pulled his fingers out and slapped her cunt. "This hole is mine tonight. Brother's cock owns it." Lena whimpered and pushed back, begging without words. He freed his thick cock, spit on it once, and drove it into her in one savage thrust. She screamed into the pillow as he bottomed out, balls slapping her sore ass.
He fucked her like the stories described: rough, fast, no mercy. One hand stayed fisted in her hair, pulling her head back while the other reached around to pinch and twist her clit. "You like your stepbrother wrecking this cunt? Say it."
"Yes, fuck yes," she gasped. "Use me. Make it hurt."
He pulled out, flipped her onto her back, and slapped her tits hard enough to leave handprints. Then he grabbed the cuffs from the nightstand drawer, the ones they had bought after reading the site together. He locked her wrists to the headboard and her ankles spread wide. She was completely open, pussy glistening, ass still burning from the belt.
He went back to the belt, this time striking her inner thighs and the swollen lips of her cunt. Each hit made her jerk and leak more. When she was shaking and pleading, he climbed on and shoved his cock back inside, pounding deep. The bed creaked violently. Sweat dripped off him onto her. He leaned down and bit her neck hard enough to mark, then sucked a bruise into her tit.
"Take it," he growled. "Take every inch like the dirty incest whore you are."
Lena came first, hard, squirting around his cock while she thrashed against the cuffs. He didn't stop. He kept slamming into her through the orgasm, then pulled out and flipped her onto her stomach again. This time he spread her ass cheeks and pressed the head of his cock against her tight hole.
"No lube," he warned. "You wanted rough."
She nodded frantically. "Do it. Fuck my ass."
He pushed in slow at first, then rammed the rest of the way when she relaxed. She howled, body shaking, but her pussy clenched and dripped onto the sheets. He fucked her ass with the same brutal rhythm, reaching under to rub her clit in rough circles. Another orgasm ripped through her. He followed soon after, flooding her ass with hot cum while he growled her name and "mine" over and over.
After he uncuffed her, they lay tangled, breathing hard. He pulled her close, fingers tracing the welts on her ass. "We should post our own story on the site," she whispered.
He smiled against her hair. "Next time we go even rougher."
They both knew there would be a next time. The site had shown them exactly what they needed, and now they had each other to make every filthy post come true.
