He stood in the middle of the bedroom, cock already half-hard under the thick white diaper she had taped on him twenty minutes ago. The plastic crinkled every time he shifted his weight, the sound loud in the quiet room. She sat on the edge of the bed in nothing but a black bra and panties, watching him with that sharp little smile that always made his balls tighten.
"Go on," she said. "Piss for me. Right now."
His face burned but his dick twitched harder. He spread his legs a little, closed his eyes, and let go. The hot stream hit the inside of the diaper fast, soaking the padding, spreading warmth across his crotch and down toward his balls. The diaper sagged heavier, the plastic bulging outward. He kept pissing until it was full, the front turning yellow and heavy, the tapes straining.
"Fuck, look at that," she muttered, standing up and walking over. She pressed her palm flat against the soaked front, squeezing the warm piss against his cock. "You’re such a filthy diaper boy."
She pushed him backward onto the bed.
He landed with a wet squish, the diaper squelching under him. She climbed on top, straddling his thighs, and ground her pussy down against the bulging front of the diaper. The wet heat soaked through the plastic onto her panties. She rocked her hips, rubbing her clit against the swollen padding, moaning low in her throat.
"Feel how wet you made me?" she growled. She reached down, yanked the tapes open, and peeled the diaper back just enough to free his cock. It sprang out, slick with his own piss. She wrapped her fingers around it and stroked once, twice, smearing the wetness up and down the shaft.
Then she pulled her panties aside and sank down on him in one smooth motion. Her cunt was tight and hot, gripping him while the open diaper still cradled his balls. She rode him hard, the soggy padding squishing under her ass every time she dropped down. Piss and her juices mixed, running down his shaft and soaking the sheets.
"Fill that diaper again while you fuck me," she ordered. "Do it."
He couldn’t hold it. Another stream of piss pulsed out around his cock, soaking everything between them. She moaned louder, grinding down harder, using the wet mess to slick her clit. Her nails dug into his chest as she came, cunt pulsing around him, and he followed right after, shooting thick ropes of cum into the ruined diaper and her pussy at the same time.
She didn’t move off him right away. She stayed seated, letting everything stay messy and warm, her fingers idly stroking the soaked edges of the diaper.
"Good boy," she whispered, leaning down to bite his lip. "We’re not done yet. I want you in a fresh one before round two."
She taped him back up, double diapers this time, thicker and even more obvious. By the time she finished, his cock was already starting to swell again inside the fresh padding. She smiled, patted the front, and pushed him down onto his knees.
"Now crawl to the bathroom. I want to watch you wet this one too."
