I slammed the door behind me, heart pounding from the heat outside, but it was nothing compared to what hit me when I saw my sister Amara bent over the kitchen table in just a thin cotton slip. Her ass cheeks were round and full, the fabric riding up to show the dark cleft between them. She looked back over her shoulder, eyes heavy, and said, "Bhai, lock it. Mom and Dad are out till late."
My cock thickened instantly in my pants. We had been dancing around this for months, ever since that one drunk night when she grabbed my dick through my jeans and whispered how wet her pussy got thinking about her own brother. Now here we were, no more pretending.
I stepped close and yanked the slip up to her waist. No panties. Her cunt was shaved smooth, lips already puffy and glistening. I dragged two fingers through her slit and she pushed back, grinding on my hand. "Fuck, you're dripping," I growled, shoving two fingers straight into her tight hole. She moaned loud, the sound filthy in the quiet house.
Amara reached back and fumbled with my belt. "Take it out. I want that thick brother cock in my mouth first." I freed my dick and she dropped to her knees right there on the kitchen floor, sucking the head greedily. Her tongue swirled around the crown while her hand pumped the shaft. Spit ran down my balls as she took me deeper, gagging when the tip hit the back of her throat. I grabbed her hair and fucked her face, watching her eyes water while she looked up at me like a dirty little slut who loved sucking her brother's dick.
After a minute I pulled her up, spun her around, and bent her over the table again. I lined up and drove straight into her soaked cunt in one hard thrust. She cried out, pushing back to take every inch. Her pussy was hot and tight, clenching around me as I started pounding. The table legs scraped the floor with every slam. Her ass rippled each time my hips smacked against it.
"Harder, bhai," she begged. "Fuck your sister's cunt like you mean it." I reached under and pinched her clit, rubbing fast while I drilled her. Her juices coated my balls and ran down her thighs. I could smell her arousal, thick and musky, mixing with the scent of our sweat. She came first, pussy spasming and squeezing my cock, a long string of filthy Urdu curses spilling from her mouth.
I didn't stop. I flipped her onto her back on the table, hooked her legs over my shoulders, and went back in deep. Her tits bounced under the slip as I fucked her hard enough to make the dishes rattle. She reached down and spread her pussy lips wider for me, showing how my cock stretched her open. "Come inside me," she panted. "Fill your sister's hole."
I slammed in to the root and unloaded, thick ropes of cum pumping deep into her cunt. She milked every drop, grinding against me until I was empty. When I pulled out, my cum leaked out of her stretched pussy and dripped onto the floor.
We weren't done. She pushed me into a chair and climbed on, riding me reverse so I could watch her ass bounce while she worked my cock back to full hardness. Her fingers played with her clit and she kept talking dirty the whole time, telling me how she had fingered herself thinking about this, how she wanted me to fuck her ass next, how she was my personal family whore now.

By the time we heard the car in the driveway we had fucked in three more positions, her cunt and mouth both full of my second load. We cleaned up fast, but the smell of sex hung in the air. Amara winked at me as she straightened her slip. "Same time tomorrow, bhai?"
I just grinned and adjusted my softening cock. This was only the beginning of our filthy secret.