I came home from my summer job and the house smelled like perfume and sweat. Mom was in the kitchen, her huge tits barely held in by a thin white tank top, nipples poking out like they wanted to cut glass. My sister Lisa was on the couch in shorts so short her ass cheeks hung out, her own fat tits spilling over the top of her crop top. Both of them were built like porn stars, the kind of buxom bodies that made every guy on the block stare.
"Fuck, you two look ready to get used," I said, dropping my bag.
Mom turned and smiled that dirty smile she only gave me lately. "Been waiting for you, baby. Lisa and I got wet just thinking about your cock."
Lisa spread her legs on the couch, showing she wasn't wearing panties. "Come here and fuck your sister first. Mom's already had her turn this morning."
I didn't need more invitation. I walked over, yanked Lisa's shorts down, and shoved my face between her thick thighs. Her pussy was shaved and dripping. I licked her hard, tongue fucking her hole while my hands reached up to squeeze those massive tits. She moaned loud, grinding on my mouth.
Mom came over and pulled her tank top off. Her heavy tits bounced free, big and soft with wide pink nipples. She grabbed my head and pulled me up. "Suck Mom's tits while you fuck your sister."
I stood, dropped my pants, and slammed my cock into Lisa's tight cunt in one thrust. She screamed and clawed my back. Mom shoved one of her big tits in my mouth and I sucked hard, biting the nipple while I pounded Lisa's pussy. The wet sounds filled the room.
"Harder, you little bastard," Lisa growled. "Fuck your sister's cunt like you mean it."
I slammed into her faster, balls slapping her ass. Mom reached down and rubbed Lisa's clit while I fucked her. Lisa came first, pussy clamping down on my dick, juices running down my shaft. I pulled out and shoved my cock straight into Mom's mouth. She took it deep, gagging but not stopping, her big tits swinging as she bobbed.

"Both of you on the floor," I ordered. They dropped to their knees like the dirty family sluts they were. Mom and Lisa pressed their massive tits together around my cock. I tit-fucked them, sliding between those warm, soft mounds while they licked the head every time it popped out.
Mom looked up at me. "Cum on our tits, then fuck Mom's ass. Lisa can clean it up after."
I lasted about ten more strokes before I shot thick ropes across their tits and faces. They rubbed it in, licking each other's skin clean. Then Mom got on all fours, reached back, and spread her fat ass cheeks. "Stick it in my asshole, son."
I spit on her hole and pushed in slow at first, then buried every inch. Mom grunted and pushed back. "That's it, wreck Mom's ass." Lisa slid underneath and started licking Mom's pussy while I fucked her ass. The double sensation made Mom shake and cum again, her asshole squeezing my cock.
I pulled out and switched to Lisa, bending her over the arm of the couch and driving into her ass next. She reached back and spread herself wider. "Use your sister's holes. We're your family fuck toys now."
We moved to the bedroom. Mom lay on her back with her legs spread wide, tits splayed to the sides. I fucked her pussy deep while Lisa sat on her face, grinding her cunt on Mom's tongue. The sight of my sister's huge tits bouncing while she rode Mom's mouth pushed me over. I filled Mom's pussy with cum, then pulled out so Lisa could suck it out of her.
By the time we finished, all three of us were covered in sweat and cum. Mom pulled me close and kissed me slow. "Same time tomorrow. Your sister wants you to breed her next."
Lisa just grinned, already fingering herself again. "Family's better when we don't pretend anymore."