It looked just like a children’s toy, made of solid wood and painted brightly, with a mane and tail of woven rope. It was just much larger, so that her legs didn’t touch the ground, not that she could, with the pink leather cuffs he’d put around her ankles locked to eyebolts screwed into the back legs. Her wrists, secured in matching pink cuffs, were bound to the handles, leaving her with little choice but to sit on the rocking horse.

Her first exploratory attempts to struggle had revealed the devious nature of the punishment. A vibrator was tied to the saddle of the horse. If she sat still, the thrumming head of the wand was just out of reach of the, thing, he’d put her in, and she could just faintly feel the vibrations buzzing through the seat, but no more. If she rocked forward, however, she her weight shifted forward enough to press the vibrator close enough to achieve stimulation. Until she rocked backwards, and that came with its own experiences as she sat back and the plug in her ass was driven deeper inside her. And any movement made the thick silicone dildo inside her shift, so there was that.

Not that she wanted any stimulation, not in her current situation.

He’d caught her playing with herself. That was a no no. A punishment had been expected. A spanking perhaps, maybe some bondage and orgasm denial. It seemed like fitting punishment, and she thought she was prepared to pay the price.

She hadn’t expected this.

All she had to do was be patient, and be still. It was a waiting game, and she could wait. She stared at the camera, hoping that if he were watching, he would be able to read the smug smile on her face. He might have thought she had no self-control, and admittedly the challenge might have been more difficult if he hadn’t dressed her like this. That had been his mistake.

Next to the camera, a full-length mirror displayed her predicament. She was forced to stare at herself, sitting astride the wooden rocking horse, her pink mittened hands gripping the handles of her mount, a large pink pacifier dominating the lower half of her face, and of course, the thick, crinkly, pink diaper taped around her hips.

As humiliating as being forced to stare at herself like this was, it was all the motivation she needed. She might have played with herself when she thought she wouldn’t be discovered, slipping her little vibrator down the front of her panties when she was alone, but there was no way she was going to try and cum in a diaper, while he watched her no less.

So she sat, adjusting to the fullness of the toys stuffing her holes, trying to keep as still as possible. He couldn’t keep her like this forever. It was a waiting game, and she was determined to win.

But as time slipped by, she started to worry that maybe he could keep her there forever. Or at least longer than she was willing to wait patiently. When he had forced her into the diaper, he had told her it would keep her from being naughty and touching herself. It had seemed it was to serve as a humiliating chastity belt, the thick padding forcing her to keep her hands from touching her needy princess parts, though the longer she was forced to wear it, the more it occurred to her that she might actually have to use it.

It was the wine that had gotten her all horny in the first place, and had impaired her judgment enough to not wait for him to come home and try to sneak in an orgasm. Now the alcohol was coming back to bite her again as the fullness in her bladder demanded more and more of her attention. She couldn’t close her legs, and every little fidget made her rock on the horse, the brief contact of her padded pussy on the way forward and the pressure on her buttplug on the way back serving to distract her. It was getting harder and harder to hold it, and worse, she was getting needy again.

She scowled behind the pacifier strapped in her mouth at her reflection. Her pierced nipples were standing out proudly on her small, pert boobs. It wasn’t fair, but she wasn’t about to debase herself even further by trying to beg through the pacifier for him to come let her out of her predicament.

Involuntarily, she gripped the contoured seat of the rocking horse tighter between her thighs, the dildo she couldn’t forget about not making her task any easier. She bit down into the thick silicone bulb of the pacifier, very conscious of every swallow of built up drool just adding to her discomfort. She’d be better off drooling down her naked chest like the helpless baby he was treating her like. A low whine escaped her throat and a feeble attempt to adjust her position set her to rocking again. She leaned forward trying to stave off the inevitable rock back and suffer the shifting of her buttplug, subjecting herself to increased pressure of her diapered crotch on the head of the vibrator. She shivered, in spite of herself, before the unavoidable rock backwards, and the jolt of the plug being driven deeper into her.

She uttered a muffled cry of shock as she lost control, a small trickle of urine escaping into her diaper. She squirmed rocking harder while she tried to adjust. She was literally rubbing her pussy in her shame, the now damp padding humming to life before she rocked backwards, and her control slipped again. Desperately, she tried to stop, but the floodgates were opened. She sobbed into her binky, her cheeks crimson, knowing he was watching while she soaked her diaper.

She stopped struggling. The rocking horse slowed, finally coming to a stop just as she did, her bladder empty. She wouldn’t forgive him for this. This was too far. How dare he do this to her.

Suddenly, the realization of just how truly devious his punishment was hit her. Before, when she remained still, the vibrator remained just out of reach of the diaper she was forced to wear. She looked down, needing to confirm with her eyes, and sure enough, her diaper, wet and heavy with her shame, bulged outward, the head of the vibrator buried in the swollen padding. She tried to scoot backwards, but she wasn’t going anywhere. Frantically, she leaned back, but the relief was short lived, and as she rocked back forward, the vibrator buried itself deeper in her soggy diaper.

Her pride was gone. She stared into the lens of the camera mounted next to the mirror, pleading incoherently into her pacifier. He had to come release her. She’d do anything. The infantile silencer turned her promises to be good into baby babble, her offers to do anything for him, to let him do anything to her, into incoherent nonsense. Drool dripped down her chin while she whined, her pigtails flapping back and forth as she shook her head.

She couldn’t escape the vibrator. It was plugged in; he’d planned to keep her like this for a long time and wouldn’t risk leaving her fate up to the life of a battery. The distance from the wall was measured perfectly, just far enough for the cord to go taught when she rocked back as hard as she could, inspiring her to try, but just not far enough to rip the plug from the outlet and end her torment. And try she did, rocking as hard as she could. Throwing her weight back, her weight settling on the plug nestled inside her. Driving herself forward, pushing her dripping pussy against the powerful vibrator. All the while, the dildo inside her made its presence felt.

Soon she wasn’t rocking to try and unplug the vibrator, her eyes having drifted from the outlet back to the mirror, watching her plight. She hated that she was enjoying this, but it just felt so damn good. The wet padding of her diaper perfectly molded to the contours of her pussy, distributing the intermittent thrum of the toy through her sex in a way she’d never imagined. She was moaning wildly into her pacifier now, the desperate keening of a bitch in heat while she thrust herself forward, trying to linger on the pinnacle of pressure at the apex of the rocking horse’s arc long enough for the toy to work its magic. Every single time, gravity yanked her back, and as she fell back on her ass, driving the buttplug inside her, she threw herself forward again, locked in a perpetual motion machine built of carnal lust. Deep moans of arousal turned into muffled screams of frustration. She was stuck in a loop, determined to achieve the only thing she desired, but it was always out of reach.

She was so focused on her quest that she didn’t see him come in the room. She didn’t even see him standing behind her in the mirror, watching her shamelessly hump the seat of the rocking horse in a wet diaper. It wasn’t until he touched her, his strong hands on her shoulder, stopping her abruptly, pulling her from the loop.

“Have you learned your lesson?”

She nodded, moaning incoherently behind her binky.

One hand on her sweaty lower back, just above her diaper, the other under her chin, forcing her to look into the mirror, to meet his gaze in their reflection, he guided her forward. She stared into his eyes as he held her there, until she couldn’t keep them open as the orgasm she had fought so hard for was finally given to her.

She had learned her lesson. It was simple.

She couldn’t cum without him.