The ship cut through the dark ocean like a secret we all shared. I stood at the railing of our private deck, the salt air thick on my tongue, when my sister Emily pressed against my back. Her hand slid straight into my shorts and wrapped around my cock without a word.
"Been hard all day thinking about this," she whispered, stroking me slow and firm. "Mom and Dad are already fucking in their suite. Heard them through the wall."
I turned and shoved her against the rail. Her bikini top came off easy. I sucked her nipple hard while my fingers pushed her bottoms aside and found her wet slit. She was dripping, ready.
I dropped to my knees right there under the stars and licked her cunt, tasting salt and her sweet juice mixed together. She grabbed my hair and ground against my face, moaning loud enough that anyone walking the deck could hear.
We didn't make it inside. I stood, spun her around, and bent her over the railing. Her ass cheeks spread as I lined my cock up and slammed into her pussy in one thrust. She cried out, pushing back to take every inch. I fucked her hard and fast, the slap of skin loud against the waves. Her tits bounced with every stroke. When she came she clamped down so tight I almost lost it, but I held back and kept pounding until I flooded her deep.
Inside the suite later that night the whole family was already going at it. Our parents had the big bed. Dad had Mom on all fours, driving into her ass while she sucked our uncle's cock. Emily pulled me onto the couch and climbed on top, sinking down on my dick again while we watched.
Mom looked over, eyes glassy with lust. "Come here, baby," she said to me. "Let Mommy taste your sister's pussy on that cock."
I moved to the bed. Mom took me in her mouth, licking Emily's cream off my shaft before Dad pulled out of her ass and offered it to me. I slid into Mom's stretched hole while Dad fed his cock to Emily. The room filled with wet sounds and moans. We switched partners again and again until everyone had fucked everyone else. I came in Mom's pussy while Dad came down Emily's throat. Then Emily sat on Mom's face so she could lick my load out while I watched.
By the end of the cruise we had fucked in the hot tub, the sauna, the lifeboat deck at midnight, and once in the dining room after hours. No one held back. We were a family that fucked together now, and the ocean just kept carrying us deeper into it.
