I knew exactly what I was doing when I slipped into the tiny pink nightie that barely covered my ass. At twenty-two I was old enough to know better, but the second I called him "Daddy" in that high, soft voice, his eyes changed.

He was already sitting on the edge of the bed in just his boxers, thick cock already pushing against the fabric.
"Come here, baby girl," he said, voice low and rough. "Daddy's been waiting all day for his little princess."
I climbed into his lap the way we always did during ageplay nights, knees on either side of his thighs, the nightie riding up so my bare pussy pressed right against the hard ridge of his dick. No panties. That was the rule when we played like this.
"You missed me, Daddy?" I asked, grinding slow and deliberate, feeling him twitch under me.
"Missed that tight little cunt more than anything." His big hands grabbed my ass, squeezing hard enough to leave marks. "You been a good girl or a bad girl today?"
"Bad," I whispered against his ear. "I touched myself thinking about you."
He growled, one hand sliding between us to cup my pussy. Two thick fingers pushed straight inside without warning, making me gasp. "This pussy belongs to Daddy. You don't touch it unless I say so."
I rocked on his fingers, already soaking wet. "I'm sorry, Daddy. Punish me?"
He pulled his fingers out and shoved them in my mouth so I could taste myself. "Open up and suck."
While I sucked his fingers clean he yanked the nightie over my head and tossed it aside. My tits spilled free and he immediately latched onto one nipple, sucking hard while his free hand worked his cock out of his boxers. It sprang up thick and veined, the head already leaking.
"Ride it," he ordered. "Show Daddy how sorry you are."
I lined him up and sank down slow, taking every inch until my ass met his thighs. The stretch always burned so good. I started bouncing, little whimpers falling out of me on every drop.
"Fuck, that's it," he grunted, hands gripping my hips to slam me down harder. "Daddy's little girl loves this big cock, doesn't she? Loves being Daddy's personal fucktoy."
"Yes, Daddy! Use me!"
He flipped us suddenly, pinning me on my back with my legs shoved up to my chest. The new angle let him pound straight into that spot that made my vision blur. Skin slapped loud and filthy. Sweat dripped off his chest onto my stomach.
"Look at this greedy cunt swallowing Daddy's dick," he said, staring down at where we were joined. "So fucking wet. You gonna come for Daddy like a good little girl?"
I nodded frantically, one hand rubbing my clit fast while he fucked me deep and brutal. The orgasm hit hard, my pussy clamping down around him, legs shaking. He didn't slow down. He kept driving through it until I was whimpering from overstimulation.
"Not done with you yet," he rasped. He pulled out, flipped me onto my stomach, and yanked my hips up. One thrust and he was back inside, deeper than before. His hand fisted my hair, pulling my head back.
"Say it," he demanded. "Tell Daddy whose pussy this is."
"Yours, Daddy! All yours!"
He fucked me like he was trying to break me in half, balls slapping against me with every thrust. When he finally came he buried himself to the hilt and stayed there, pulsing hot and thick inside me while he groaned my name like a prayer.
We stayed locked together, breathing hard. After a minute he eased out and pulled me against his chest, stroking my hair the way he always did when the scene was over.
"You okay, baby?" he asked, voice soft again.
I smiled against his skin. "Better than okay. Same time next week?"
He chuckled and kissed the top of my head. "Count on it, princess."