It started with a dare in the backyard. Lisa was twenty-five, her sister Megan twenty-three, both home for the weekend after too many years apart. The parents were gone for the night. They’d been drinking cheap wine since noon, laughing about old times, and the heat made everything sticky. Lisa stood up, peeled off her shorts right there on the grass, and said, “Fuck it, I gotta piss. Watch this.” She squatted, spread her thighs, and let a hard yellow stream arc out, splashing loud on the dry dirt. Megan stared, mouth open, then laughed and yanked her own panties down. “No way you’re doing that alone.” Their piss mixed in the grass, the sharp smell rising in the sun. Neither looked away.
They didn’t bother dressing again. Inside the house they stayed naked, skin flushed from the wine and the sudden closeness. Lisa pushed Megan against the kitchen counter, fingers sliding straight between her sister’s wet cunt lips. “You liked watching me piss, didn’t you, you filthy bitch?” Megan moaned and nodded, grinding down on the hand. Lisa shoved two fingers deep, then pulled them out and wiped the slick mess across Megan’s tits. They kissed hard, tongues sloppy, tasting wine and sweat.
Lisa dragged her sister to the bathroom. She sat on the toilet, legs wide, and told Megan to kneel. “Open your mouth.” The first hot spurt hit Megan’s tongue, then her chin, running down her neck.
Megan swallowed what she could, gagging but pushing closer, licking the stream as it sprayed. Lisa laughed, low and dirty. “That’s it, drink your big sister’s piss.” When the flow slowed she stood, bent Megan over the sink, and shoved her face into the wet porcelain. Lisa lined up behind her and pissed straight onto Megan’s spread ass, the hot liquid running down her crack and over her cunt. Megan reached back and rubbed it in, moaning like a whore.
They moved to the bedroom. Lisa lay on her back and pulled Megan on top, sixty-nine. She buried her tongue in her sister’s cunt while Megan did the same. Every few minutes one of them would let go, pissing into the other’s mouth or over her tits. The sheets grew soaked, the room thick with the smell of piss and cunt juice. Lisa came first, thighs clamping Megan’s head while she sprayed a long, messy orgasm into her sister’s mouth. Megan swallowed and kept licking, then let her own piss go, flooding Lisa’s face until it ran into her hair.
They didn’t stop. Lisa rolled Megan onto her stomach, spread her cheeks, and licked her asshole, then pissed right on it again, watching the yellow run over the tight hole. She worked two fingers into Megan’s ass while her sister bucked and begged. “Fuck me, Lisa. Use me like the piss slut I am.” Lisa added a third finger, then fetched the strap-on from her old college bag. She fucked Megan’s cunt first, deep and rough, the wet sounds filthy. Every few strokes she pulled out, let Megan piss on the toy, then shoved it back in.
Later they stood in the shower, door open, and took turns pissing on each other’s faces while the other rubbed her clit. Lisa held Megan’s head under the stream until she was choking and laughing, then Megan did the same, aiming straight at Lisa’s open mouth. They ended up on the floor, tangled, Lisa fisting Megan slow and steady while Megan pissed in short bursts over Lisa’s wrist and forearm. When Megan came she screamed, whole body shaking, piss and cum mixing on the tile.
They stayed there until the sun went down, swapping stories about every secret fantasy they’d never said out loud. By the time they finally showered for real, the house smelled like sex and piss and they didn’t care. They crawled into Lisa’s old bed together, naked, still dripping. Lisa pulled Megan close and whispered, “We’re doing this every time we’re home. No more pretending.” Megan just smiled and let another small, hot trickle leak onto Lisa’s thigh before they fell asleep.
