The sun beat down on our private stretch of beach as Mom dropped her towel first. Her big tits bounced free, nipples already hard from the breeze. Dad was right behind her, his thick cock swinging half-hard between his legs like it always did when we went full nudist.
"Get those clothes off, kids," he said with that grin. "We're here to relax and be ourselves."
My sister Lisa, twenty-one and already tanned from last summer's trips, peeled her tank top over her head. Her perky tits popped out, and she shimmied out of her shorts, showing off a smooth shaved pussy. I was twenty-three and didn't hesitate either. My cock sprang up the second the air hit it. We were all naked within minutes, the way our family always spent vacations.
Mom stretched out on a big blanket, legs spread a little. "God, it feels good to be bare. Remember when we started this, honey?" she said to Dad. He grunted and sat beside her, one hand already resting on her thigh. Lisa flopped down next to them, and I took the other side.
It started innocent enough. Dad rubbed sunscreen on Mom's tits, squeezing them while she moaned softly. Lisa asked me to do her back. My hands slid over her shoulders, down her spine, then lower. I didn't stop at her ass. I rubbed the lotion between her cheeks and she pushed back against my fingers.
"Fuck, that feels nice, bro," she said, voice low. She rolled over, tits pointing up, and spread her legs. "Do my front too."
I squirted more lotion straight onto her pussy. My fingers slipped through her folds, rubbing her clit in slow circles. She was already wet. Mom watched us, smiling, while Dad's hand moved between her own legs, fingering her openly.
"You two have been eyeing each other all year," Mom said. "Go ahead and fuck. We're family. We share everything."
Lisa grabbed my cock and stroked it hard. "Been wanting this thick dick inside me for months." She pulled me on top of her right there on the blanket. I pushed into her tight pussy in one thrust. She was burning hot and soaked. We started fucking slow at first, then harder, skin slapping while Mom and Dad cheered us on.
Mom crawled over and straddled Lisa's face. "Eat Mommy's cunt while your brother pounds you." Lisa's tongue went straight to work, licking Mom's shaved slit as I kept driving into her. Dad moved behind me, his hands on my hips, guiding my strokes like he was coaching. His cock brushed my ass now and then, thick and ready.
After Lisa came hard, clenching around my cock, Mom pulled me out and sucked me clean. "Tastes like your sister's pussy," she said, then turned around and offered her ass. I slammed into Mom from behind while Dad fed his cock into Lisa's mouth. We switched partners like it was nothing new. Dad fucked Lisa next, pounding her while she sucked Mom's tits. I took Mom's pussy again, then switched to her ass when she begged for it.
The whole afternoon turned into one long fuck session. We moved from the beach to the house, still naked, bodies sticky with sweat and cum.
Lisa rode Dad on the couch while Mom bent over the kitchen table for me. Later we piled into the big bed, all four of us. Mom and Lisa made out while Dad and I took turns fucking them from behind. Everyone came multiple times. Cum leaked down thighs, coated tits, got licked off wherever it landed.
By night we were still going, raw and messy, no limits left. Mom sat on my face while Lisa sucked Dad's cock beside us. We swapped again and again until everyone was sore and satisfied.
The next morning we woke up tangled together, already touching. Another day of family nudist life meant more of the same. No clothes, no rules, just us fucking whenever we wanted. That was how our vacations always ended up.
