The room smelled of baby powder and something darker, something like fear mixed with sweat. Marcus had no idea how he ended up here, strapped into the oversized crib with thick plastic pants crinkling every time he shifted. The woman who called herself Mistress Elena had taken him from the bar two nights ago, slipped something in his drink, and now he was her project. She called him her new sissy baby, and she was determined to break him into exactly that.
She stood over the crib in a tight black dress, holding a bottle filled with something warm and sweet. "Drink it, sissy," she said, her voice low and commanding. "Every drop, or the paddle comes out again." Marcus shook his head, but the mittens on his hands made resistance pointless. She forced the nipple between his lips and squeezed the bottle until the liquid flooded his mouth. It tasted like formula laced with something that made his head fuzzy and his cock twitch inside the thick diaper.
By the time the bottle was empty, the pressure in his bladder was unbearable. He tried to hold it, but the drug in the drink worked fast. Warmth spread through the padding, soaking it, and Elena smiled. "Good girl. Look at you, wetting like the pathetic sissy you are." She reached down, pressed the front of the diaper, and rubbed the wet bulk against his hardening dick. "That's it. Get hard in your pissy diaper. This is what you were made for."
She unlocked the crib rail and pulled him out, making him crawl across the floor to the changing table. There she stripped off the soaked diaper, wiped him clean, and slid a fresh one underneath. But this one had a difference. A thick, realistic dildo was built into the front, angled so it would press right against his hole once the diaper was taped up. Marcus tried to squirm away, but she pinned him with one hand and shoved the dildo in with the other, working it deep while she taped the diaper tight.
"Feel that, sissy? That's your new boyfriend. Every time you move, it fucks you a little more." She rolled him onto his stomach and spanked the padded ass hard, the sound loud in the quiet room. "Now say it. Say you're a diaper sissy who needs cock."
He stayed silent until the paddle came down five times in a row. "I'm a diaper sissy," he gasped. "I need cock."
"Whose cock?"
"Any cock you give me, Mistress."
She laughed and pulled out her phone. "Good. Because I have friends coming over tonight. Big, rough men who love breaking in new sissy babies. You're going to suck them while you sit in your wet diaper, and you're going to thank them for every load."
The hours blurred. By the time the men arrived, Marcus was dressed in a frilly pink onesie that barely covered the bulging diaper, plastic pants shiny over the top. The dildo inside him kept him half-hard and leaking. Elena made him kneel in the middle of the living room as three large, muscular guys walked in. They laughed when they saw him, called him a pathetic faggot baby, and one of them immediately unzipped.
"Open wide, sissy," Elena ordered. Marcus hesitated, but the dildo shifted when he moved and sent a jolt through him. He opened his mouth. The first cock slid past his lips, thick and salty, and he gagged as it hit the back of his throat. The man grabbed his head and fucked his face while the others watched and stroked themselves. Every thrust made the diaper crinkle and the dildo grind deeper.
They took turns. Marcus ended up on all fours, sucking one while another pulled the plastic pants down just enough to expose the diaper. They cut a hole in the back, yanked the dildo out, and replaced it with a real cock. It stretched him open, burning and filling him at the same time.

He moaned around the cock in his mouth, the sound muffled and desperate. Elena filmed the whole thing, narrating. "Look at the adult sissy taking real cock now. No more pretending. This is who you are."
They used him for hours. Cum filled his mouth, his ass, and even leaked into the front of the diaper when one of them jerked him off through the padding. By the end he was shaking, face streaked with tears and spit and semen, the diaper heavy and warm again from another forced wetting. Elena changed him one last time, this time making him thank each man for the use before they left.
When they were gone, she tucked him back into the crib, the fresh diaper taped tight around his sore, used hole. "Sleep, sissy," she whispered. "Tomorrow we start all over. You'll learn to beg for it soon enough."
Marcus closed his eyes, the taste of cum still on his tongue, the ache in his ass a constant reminder. Somewhere beneath the humiliation, heat still pulsed. He hated how hard he was getting again just thinking about it. The forced part was fading into something else, something that made his stomach twist with unwanted need. He was already hers, and the worst part was how much his body wanted the next round.