I never expected my own sister to fuck my ass, but there I was on all fours with her thick strap-on buried balls-deep in my hole. "Take it, you filthy little brother," Rachel growled, slamming her hips forward. Her fake cock stretched me wide, the lube squelching loud as she pounded me. I groaned into the mattress, my own cock leaking onto the sheets while she gripped my hips and railed me harder. "You begged for this, didn't you? Told me how bad you wanted your big sis to peg your tight ass."
She was right. It started weeks ago when she walked in on me jerking off to pegging videos. Instead of freaking out she just smirked, pulled her shirt off, and said, "I can do that for you, little brother. Want me to fuck you like those girls do?" From then on it was raw and nonstop. Every night after our parents went to bed she'd come to my room with her harness already on, cock swinging between her thighs. She'd shove me down, spit on my hole, and push in without mercy.
"Fuck, your ass is so greedy," she hissed tonight, pulling almost all the way out before driving back in. The slap of her thighs against my ass filled the room. I pushed back, taking every inch, my balls swinging as she fucked me like she owned me. "Tell me how much you love your sister's cock."
"I love it," I grunted, voice rough. "Love when you peg my ass, sis. Harder." She laughed, low and dirty, and gave me exactly what I asked for. Her hand reached under me, grabbed my throbbing dick, and stroked in time with her thrusts. Precum dripped over her fingers. She didn't let up, pounding my prostate until my legs shook.
Rachel leaned over my back, her tits pressing against me, and bit my shoulder. "Gonna make you cum on my cock again. Then I'm gonna make you eat it." The filthy promise sent me over the edge. I shot thick ropes across the bed, my ass clenching around her strap-on. She kept fucking me through it, milking every drop until I was whimpering.
When she finally pulled out she flipped me onto my back and straddled my face. "Clean it," she ordered. I licked the lube and my own ass off the silicone cock while she rubbed her wet pussy on my chest. Once it was clean she tossed it aside, climbed on my still-hard dick, and rode me reverse so I could watch her ass bounce. "Now it's my turn, little brother. Fill your sister's cunt."
We fucked like animals until dawn, switching positions, her pegging me again after I came inside her. By the time the sun came up we were both wrecked, covered in sweat and cum, already planning the next night. This was our secret now, raw and dirty and ours alone.
