The car hummed down the interstate with Jordan strapped in the passenger seat, thick diaper crinkling every time he shifted. His girlfriend, Mia, drove with one hand on the wheel and the other resting on his thigh, fingers tracing the plastic edge of his padded crotch. "You better not hold it," she said, voice low and direct. "I want that diaper heavy before we hit the next state line."
Jordan's bladder already ached. Mia had made him chug two bottles of water at the last gas station and then refused to stop for anything but gas. The sun beat through the windshield, and the thick padding between his legs felt warm and bulky. He tried to clench but the pressure built fast. A few miles later a spurt escaped, soaking the front of the diaper. Mia glanced over and smirked. "That's it. Let it go. I can smell the piss already."
He groaned and pushed, releasing a long, hot flood. The diaper sagged heavily between his thighs, the plastic outer layer bulging. His cock, half-hard from the humiliation and the warmth, twitched against the soggy padding. Mia reached over and squeezed the front, feeling the squish. "Fuck, that's a big one. You're leaking a little already. Good boy."
They drove another hour like that, Jordan's diaper growing heavier and warmer. Every bump in the road made the wet mess shift against his balls and shaft. Mia kept talking dirty, telling him exactly what she planned to do at the next rest stop. "I'm gonna lay you out in the backseat, wipe that filthy thing clean, and then ride your face while you suck on a fresh diaper. Maybe I'll let you cum if you fill the new one for me."
By the time they pulled off at a nearly empty rest area, Jordan's diaper was sagging low and the smell of urine filled the car. Mia parked at the far end of the lot, killed the engine, and climbed into the backseat first. She spread out a changing mat and patted it. "Get back here. Pants off."
Jordan climbed over the console, diaper squelching loudly. He lay back, legs spread. Mia ripped the tapes open with quick, rough motions. The heavy, piss-soaked diaper flopped open, exposing his cock, which was fully hard now and glistening. She wiped him down with cold wipes, making him hiss, then balled up the used diaper and tossed it in a plastic bag. "New one on," she ordered, sliding a fresh, thick diaper under his ass. She powdered him heavily, then taped it up snug, giving his cock a firm pat through the padding. "Now you're clean enough to fuck my mouth."
She tugged the front of the new diaper down just enough to free his cock and balls, then leaned in and swallowed him to the root in one motion. Jordan gasped, hips bucking. The dry padding crinkled around his hips while Mia sucked him hard and sloppy, spit running down his shaft. She pulled off long enough to say, "Piss in my mouth a little if you have to. I don't care." Then she went back down, throat working.
He didn't piss, but he came fast, groaning as he pumped thick ropes down her throat. Mia swallowed every drop, licked him clean, and tucked him back into the fresh diaper. "Good. Now drive for a while. I want you desperate again by dark."
They switched. Jordan took the wheel, diaper already feeling warm from the brief exposure and the lingering heat of his orgasm. Mia lounged in the passenger seat with her shorts unbuttoned, fingers lazily circling her clit while she watched him squirm. "Tell me when you need to go again," she said. "I want to hear you beg to use your diaper like the filthy roadtrip baby you are."
Hours later, as the sky turned orange, Jordan's voice cracked. "Mia, I'm leaking. I can't hold it." She leaned over, hand pressing hard on the front of his diaper. "Then don't. Soak it while you drive. I want to watch your face while you piss yourself like a toddler."
He let go with a long, shuddering sigh. Hot urine flooded the padding again, soaking through the layers until the diaper hung heavy and the seat beneath him felt damp at the edges. Mia moaned softly, rubbing herself faster. "Fuck, that's so hot. Pull over at the next exit. I need you to change me too, but first you're going to eat me out while that diaper leaks all over the floor."
By the time they reached the motel that night, both of them were aching. Jordan's diaper was double-soaked and sagging to his knees. Mia shoved him onto the bed the second the door closed, ripped his pants off, and straddled his padded crotch. She ground down on the bulging, wet diaper, the plastic slick against her bare pussy.
"We're not leaving this room until both of us have ruined at least three diapers," she said, voice raw. "Now be a good boy and wet again while I cum on your face."
Jordan obeyed, pushing another stream into the already ruined padding while Mia lowered herself onto his mouth. The taste of her mixed with the faint smell of his own piss, and the crinkle of fresh diapers waiting on the nightstand promised the rest of the night would be just as filthy. The road could wait.
