The two sisters had the house to themselves for the weekend, and they knew exactly how they wanted to spend it. Mia, twenty-two, and her younger sister Lila, twenty, had been sneaking around with each other since they both turned eighteen. What started as curious touches had turned into something raw and filthy they couldn’t get enough of.
They stripped in the living room, clothes tossed on the floor. Mia pushed Lila onto the couch and spread her legs wide. “Piss for me first,” she ordered, voice low and direct. Lila grinned, relaxed her bladder, and let a hot stream arc out, soaking the cushions and splashing onto Mia’s bare thighs. The sharp, warm scent filled the air as Mia rubbed it into her skin, then dropped her face between Lila’s legs to lick the last drops from her sister’s cunt.
Lila moaned and grabbed Mia’s hair. “My turn to watch you.” Mia stood over her, legs apart, and let her own piss flow, drenching Lila’s tits and stomach. The liquid ran down in rivulets, pooling between Lila’s thighs. Lila scooped it up with her fingers and shoved them into her mouth, sucking them clean while Mia watched.
They moved to the bathroom for more room. Mia sat on the edge of the tub and pulled Lila onto her lap, grinding their wet pussies together. They kissed hard, tongues deep, while their bladders let go again, piss mixing and running down their legs onto the tile. Mia slid two fingers into Lila’s slick hole and fucked her fast, the wet sounds loud and obscene. Lila came with a shout, her piss still trickling out around Mia’s hand.
They didn’t stop there. Mia bent Lila over the sink and ate her ass while Lila reached back and spread herself open. Every few minutes one of them would release another stream, the hot liquid running over Mia’s face and into her mouth. She swallowed what she could, the taste sharp and dirty and perfect.
Later they moved to the bedroom.

Mia strapped on a thick dildo and fucked Lila from behind on all fours, the toy sliding in and out of her sister’s cunt with wet slaps. Every time Lila got close, Mia pulled out and told her to piss on the bed. Lila obeyed, soaking the sheets while Mia rubbed her clit through the stream. Then Mia pissed on Lila’s back, marking her, before shoving the dildo back in and pounding her until Lila screamed through another orgasm.
They switched places. Lila fucked Mia with the strap, making her squirt piss and come at the same time, the liquid spraying across the mattress. They rolled in the mess, bodies slick, licking and fingering and pissing until the sheets were soaked through and the room reeked of sex and urine.
By the end they lay tangled together, sticky and satisfied, already planning the next round. Their secret stayed between them, exactly the way they liked it—raw, filthy, and all theirs.