**Beach Baby**

The sun was beating down on us as we lounged on our towels, just me and my stepsister Pat. She was stretched out in her tiny, white bikini, her tits barely contained, her long legs glistening with sunscreen. Meanwhile, I was in my swim trunks, trying not to let my nerves show. She knew. She *always* knew.

Pat turned her head, smirking at me over her sunglasses. “Aw, is little Ben getting shy again?” She giggled, reaching over to tug at the waistband of my trunks. “Let me see if you’re even big enough to make a lump in these.”

Fuck. My face burned as she peeked inside. There was nothing to see—just my tiny little dick, soft and pathetic against my thigh.

“Jesus,” she laughed, pinching my side. “You really *are* a baby down there, aren’t you?”

I swallowed hard as she sat up, swinging a leg over my hips so she could straddle me right there on the beach. No one was close enough to see us, but my heart pounded anyway. Her pussy was barely hidden by her bikini bottoms, and I could feel the heat of her through the thin fabric of my trunks.

“Look at you,” she teased, grinding down just enough to make me squirm. “You’re not even hard yet. I bet you couldn’t even fuck me if you tried.”

She was right. My dick twitched pathetically, but it was nothing—just a tiny, useless nub.

Pat bit her lip, then reached back to untie her bikini top. Her tits spilled free, nipples stiff from the ocean breeze. “Maybe you need some help, huh? Maybe you’re just a little baby who needs his stepsis to take care of him?”

Before I could answer, she yanked my trunks down, exposing me completely. My little cock was half-hard, barely two inches, and she laughed again as she wrapped her fingers around it.

“Aw, look at it,” she cooed, jerking me with just her thumb and forefinger. “So cute. Bet you’d fit right into a diaper.”

That *really* got me going. My hips bucked as she worked my tiny dick, her other hand teasing my balls. “You like that, don’t you? You like being my little baby?”

I gasped and nodded, my cock twitching in her grip.

Pat leaned down, her breath hot against my ear. “Then beg for it.”

“Please,” I whined. “Please, Pat, I—I need—”

She didn’t let me finish. In one quick motion, she shimmied out of her bikini bottoms, her wet pussy glistening right above my face. “Lick,” she ordered, pressing down.

I obeyed, burying my tongue in her folds, lapping at her clit like a desperate puppy. She moaned, grinding against my mouth as I slurped up her juices. My tiny cock throbbed, aching for attention, but she ignored it completely.

“Good baby,” she panted, fingers tangling in my hair. “Such a good little boy. But you know what?” She pulled away suddenly, leaving my lips wet and my dick aching. “I think you *do* need a diaper.”

Before I could protest, she reached into her beach bag and pulled out one of the thick, crinkly pull-ups she’d brought “as a joke.” My face burned, but my cock twitched—fuck, I *wanted* it.

She made me step into it like a toddler, then tugged it up over my hips, pressing the front against my tiny erection. “There,” she said, patting the bulge. “Now you won’t make a mess.”

Then she climbed back on top of me, her bare pussy rubbing against the padding. “You’re *my* baby now,” she whispered, rocking against me. “And babies don’t get to fuck.”

I groaned as she rode the outside of my diaper, her slick pussy soaking through the fabric. She came like that, grinding down hard, her fingers pinching my nipples as she moaned my name.

When she was done, she peeled the soaked diaper off and laughed at my pathetic little cock, still dribbling pre-cum. “Maybe next time,” she teased, giving it a slap, “you’ll grow up big enough to be useful.”

But we both knew—I never would.