We hit the rocks at dawn. The yacht split like cheap wood and I grabbed my sister Mia as the wave slammed us under. Salt burned my eyes but I held her tight, kicking hard until we washed up on the black sand. Both of us naked except for the torn life vests we’d yanked on at the last second. No one else made it. Just me and my twenty-two-year-old sister, stranded with nothing but each other and the heat already rising off the sand.
Mia coughed up seawater and rolled onto her back. Her tits spilled out of the vest, nipples dark and tight from the cold. I stared. Couldn’t help it. She caught me and didn’t look away.
“Fuck, Jake,” she rasped. “We’re alive.”
“Yeah.” My cock was already half-hard from the adrenaline and the sight of her. I didn’t bother hiding it.
She sat up, water running down her belly. “We’re gonna die here if we don’t find water and shelter. But first…” Her eyes dropped to my dick. “You’re hard as fuck. I can see it.”
I didn’t apologize. “You’re naked and soaking wet. Sue me.”
Mia laughed, low and dirty. She crawled over on hands and knees, life vest hanging open. “We almost died. I’m not wasting another second pretending I don’t want my brother’s cock.”
She wrapped her hand around me and squeezed. I groaned. She stroked once, twice, then leaned in and licked the head, tasting salt and precum. I grabbed her wet hair and pushed deeper into her mouth. She took it, gagging but not stopping, sucking like she’d been waiting years.
I flipped her onto her back in the sand and shoved her legs apart. Her pussy was shaved smooth and already glistening. I buried my face between her thighs and licked hard, tongue fucking her hole while my fingers rubbed her clit. Mia bucked and swore, grinding on my face.
“Eat that pussy, big brother. Make me come before I ride you.”
She came fast, thighs clamping my head, juices flooding my tongue. I didn’t give her time to recover. I flipped her onto all fours, lined up, and slammed my cock straight into her tight cunt. She screamed my name into the empty beach.
I fucked her raw and rough, hips slapping loud against her ass. Every thrust pushed her forward in the sand. She reached back and spread her cheeks so I could go deeper. “Harder. Breed me, Jake. Fill your sister’s pussy.”
The words lit something dark in me. I grabbed her hips and pounded harder, balls slapping her clit. “You want your brother’s load? Want me to knock you up on this fucking island?”
“Yes! Come in me. Impregnate me. I don’t care if it’s wrong. I want it.”
I roared when I came, pumping thick ropes deep inside her. She milked every drop, clenching around me until I was empty. We collapsed in a sweaty, sandy heap.
That was day one.
By day three we had a lean-to and fresh water. By day five we stopped pretending we were doing anything but fucking like animals. Mia walked around camp naked, tits bouncing, my dried cum on her thighs. I bent her over logs, fucked her standing in the surf, pinned her against palm trees. Every time I came inside her she begged for it.
“Knock me up,” she’d moan, legs locked around my waist. “Put a baby in your sister. Make me pregnant with your load.”
We stopped pulling out. Stopped caring. Her pussy stayed sloppy and full, my cum leaking down her legs while she gathered coconuts or we searched for food. At night she’d ride me slow and deep, whispering filthy shit.
“Imagine me with a big belly, tits full of milk. You’ll still fuck me, right? Still breed your knocked-up sister?”
I’d answer by flipping her and hammering another load into her womb.
Weeks passed. The island gave us everything we needed except rescue, and after a while we stopped wanting it. Mia’s period never came. Her tits swelled, nipples darker. She glowed when she told me.
“I’m pregnant, Jake. Your cum did it.”
I dropped to my knees in the sand and ate her out until she screamed, then stood and fucked her standing up, hands under her ass, cock driving straight into her fertile, already-occupied pussy.
“Gonna keep filling you,” I growled against her neck.
“Keep you pregnant. Keep this cunt dripping.”
She came hard, clenching around me, and I pumped another thick load deep where it belonged.
We never got off that island. Didn’t want to. Years later our little family lived in a bigger shelter we built together. Mia stayed barefoot and pregnant more often than not, belly round, tits heavy, always ready for her brother’s cock. We fucked every day like the shipwreck never ended, like the only law left was raw, dirty, endless breeding.
And every time I emptied my balls inside her she smiled and whispered the same thing.
“Free. We’re finally free.”
