Chapter 5
We made it to the private island beach with the rest of the family a couple of hours later.
The sun was bright, the water crystal clear, and the private stretch of sand was dotted with lounge chairs and umbrellas for the reunion group.
Sophie stayed close to my side the whole time, her hand occasionally brushing mine or her shoulder touching my arm as we walked.
When she slipped off her cover-up, I nearly lost it.
She was wearing a tiny white bikini that left almost nothing to the imagination.
The top barely contained her full breasts, and the bottoms were little more than strings on her hips, showing off the smooth curve of her ass — still faintly pink from my hand earlier.
The sight of her like that, marked by me underneath the innocent white fabric, made my cock twitch hard in my swim trunks.
I had to adjust myself discreetly as we walked toward the water. Sophie caught me looking and gave me a small, knowing smile, but kept it subtle.
The family was scattered around — kids building sandcastles, adults chatting under umbrellas.
To everyone else, we looked perfectly normal.
The caring uncle helping his niece with her sunscreen, his hand lingering just a second too long on her lower back.
Sophie asking me to help tie the strings of her bikini top, turning so I could do it while the family chatted nearby.
“You’re killing me, sweetheart,” I muttered under my breath as I tied the strings, my fingers brushing her warm skin.
She looked over her shoulder at me with that sweet, innocent smile. “I don’t know what you mean, Uncle Alex.”
The entire afternoon was pure torture wrapped in domestic sweetness.
We built a sandcastle with some of the younger cousins.
Sophie sat between my legs in the sand, leaning back against my chest while we worked.
Every time she shifted, her ass pressed against me.
I kept one hand possessively on her hip, hidden from view by the angle.
When we went into the water, she wrapped her legs around my waist “for balance” while I carried her deeper.
To the family watching from the shore, it just looked like a sweet uncle helping his niece enjoy the ocean safely.
No one could see the way she ground herself subtly against the hard bulge in my swim trunks under the water, or the way my hands gripped her ass possessively beneath the surface.
“You’re so hard, Uncle Alex,” she whispered in my ear, her arms around my neck. “I can feel you throbbing against me.”
I squeezed her ass harder, pulling her tighter. “Behave yourself, sweetheart. Or I won’t be responsible for what happens when we get back to the cabin.”
She just smiled innocently and kissed my cheek, her legs staying locked around me as I carried her even deeper into the water.
The entire afternoon was like that — subtle touches, little kisses on the cheek in front of the family, me fixing her drink or putting sunscreen on her back while she did the same for me. To everyone else, it was adorable. Helpful family members looking out for each other.
But every single second, I was fighting the overwhelming urge to drag her behind a rock or into the trees and fuck her senseless.
We drifted farther out into the clear turquoise water, the family’s voices fading into the background.
The beach was still visible, but we were deep enough that no one could see what was happening below the surface.
Sophie’s legs stayed locked around my waist, her arms around my neck as I held her up in the gentle waves.
She leaned in and kissed me — soft at first, then deeper, her tongue brushing mine. “No one can see us out here,” she whispered against my lips before kissing me again.
She kept doing it. Little kisses turning into longer ones. Her hips rolling subtly against me under the water, grinding her barely-covered pussy against the hard bulge in my swim trunks.
“Sophie…” I warned, my hands gripping her ass tighter.
She just smiled innocently and kissed me again, deeper this time, her tongue teasing mine. “I can feel how hard you are, Uncle Alex,” she whispered, nipping at my bottom lip. “You’ve been like this since you saw me in this bikini. Does your naughty niece turn you on that much?”
Another kiss. Another slow grind of her hips.
I was losing control fast.
She leaned in once more, kissing me slow and filthy, her tongue stroking mine as she whispered, “I’m so wet for you. I’ve been wet since you spanked me this morning…”
That was it.
I growled low in my throat, a deep, primal sound. One hand yanked the crotch of her bikini bottoms aside while the other freed my aching cock from my trunks. In one rough motion, I pulled her down and thrust up, burying myself balls-deep in her tight, wet pussy right there in the open water.
“Fuck,” I snarled against her mouth as I started fucking her hard. “You wanted this, didn’t you? Teasing your uncle until he snaps and fucks you in the middle of the ocean with the whole family on the beach.”
Sophie moaned into my mouth, her legs tightening around me as I pounded into her. The water splashed around us with every thrust, but from the shore it just looked like we were playing in the waves.
“Yes, Daddy,” she gasped between kisses, using the word that always made me feral. “Fuck your naughty niece. Fill me up right here.”
I gripped her ass hard and fucked her with deep, powerful strokes, the risk making everything more intense. I kissed her hard to muffle her moans, swallowing every whimper as I claimed her in the middle of the ocean.
“You’re going to walk back to the beach with my cum dripping down your thighs,” I growled against her ear. “And no one will know what a dirty little slut you are for me.”
Sophie came first, clenching around my cock with a muffled cry. I followed right after, burying myself deep and pumping load after load into her as the waves rocked us.
I held her close afterward, still buried inside her, kissing her softly as we caught our breath.
This vacation had officially gone off the rails.