Royal Oopsie

Panic took over immediately. She heard hoofsteps from the right, drawing closer as the ponies they belonged to began rounding the corner. Celestia scrambled forward, running down the front hallway, which was mercifully empty. For now.

She made it just in time to avoid being seen, but didn’t stop. Celestia ran down the hall, stumbling awkwardly as she tried to keep a steady pace with her hind legs spread apart by her diaper. The design of her castle gave way to many doors and branching paths along each hallway, this one included. There were a lot of opportunities for more ponies to potentially see her. She kept this in mind as she darted down. Then she skidded to a stop.

“I’ll begin sweeping if you take the walls.”

“Aww, but I did the walls last time!”

“So do them again, I already told you I’m sweeping.”

Voices!

Celestia flinched as she heard talking coming from a pair of maids as close as the upcoming intersection. Her heart thumped wildly and she swallowed. Now what?

She shot glances to the right and left of her, hoping that she might remember where another secret passage was. Her gaze settled on a door to her right that was slightly ajar. Perfect!

Bolting in and slamming the door behind her, Celestia inhaled deeply through her nose. Now safe from view, she took a moment to just calm down and breath. Her heart was beating wildly, but she managed to steady it some after a minute or so. Squinting against the dark expanse she found herself in, Celestia fumbled along the wall with her bootie-d hoof until she finally flicked a light switch.

The room brightened, revealing itself for what it really was: a tiny bathroom. It was so small in here that Celestia couldn’t even stretch out her foreleg before hitting the wall. It had a toilet on one end and a sink on the other, with just enough space for a pony of her size to fit in between. Directly above the sink was a mirror and beside that was a little towel hanging by a hook. All in all, it was about a minimalist as a bathroom could be.

Celestia blushed as she saw her reflection. Her ponytails, her pacifier, her diaper… it all came together to make her appear perfectly like an overgrown foal. At least she got the look she was going for, but it couldn't stay unfortunately.

Now that she had time to think without needing to worry about hiding so much, Celestia’s heart rate steadied some. She looked down to her booties, her diaper, and she suckled her pacifier a little for comfort. They all needed to come off.

She started with the booties, poking at the edges as best she could, but found that to be useless. Her hooves slipped by the sleeves of them without even making in impact. Grunting, she decided to use her teeth. Except…

Celestia tried to open her mouth, but the straps of her pacifier wouldn’t let her. Furrowing her brows, she reached around her head to undo the strap, but her fuzzy booties made it impossible to grab onto anything.

Now slightly panicking, Celestia turned to her diaper. If that pacifier and booties wouldn’t come off, she at least hoped it would. She went to pop the tapes off, but her bootie just slid right over them.

Now really panicking, Celestia tried to rip her diaper off. She yanked, pulled, tore, and wiggled, but nothing she could do impacted the poofy padding secured to her waist. All she succeeded in doing was making a lot of crinkling noises, which at worst might get one of the castle’s staff curious as to what was happening inside whenever they might pass by the door.

Biting down on her pacifier, Celestia became worried. She couldn’t actually be stuck, right? She was sure sometime in the past she’d been able to take this off…

Well…

Now that she thought about it, she’d always had her magic to help her out. Turning her attention back to the mirror, Celestia looked at the black band resting at the base of her horn. Just to see, she attempted to call upon her magic, but nothing happened.

Her stomach flopped and Celestia found herself really regretting trying on the horn ring. What had she been thinking?

Short answer: she hadn’t. It had been a heat of the moment decision based in arousal. Just because she couldn’t remember how poorly it had went the last time didn’t excuse her from ignoring the dangers before placing it on.

Though, not locking her door was probably a more face-hoof worthy moment.

Locking the door…

Celestia’s eyes widened and she turned to the bathroom door. It wasn’t locked.

Heart thumping, Celestia practically dove for the doorknob, aiming to turn the little switch that would ensure her privacy. Except, when her hooves came up she saw her pink booties again and knew it would be a fruitless effort.

Trying anyway, Celestia only proved herself right. The booties couldn’t get a grip on the tiny switch, meaning the bathroom would remain unlocked, and she was still vulnerable to be seen like… this.

She couldn’t stop a whimper from escaping her. This was not good! She wasn’t just stuck outside of her room, she was stuck in this getup too! If anypony saw her… her marehood quivered at the thought. She knew it wouldn’t--

Wait a second.

Her marehood… was quivering?

Oh no, please don’t tell me I’m liking this!

As horrifying as the realization was, Celestia couldn’t deny it. This was her fantasy, wasn’t it? Humiliation, helplessness, diapers… Was it really a surprise that she was turned on right now?

She chewed her pacifier as her nether region tingled. This was already bad enough; to think that she wanted to masturbate right now on top of everything else going on…

No.

Celestia pushed the thought from her mind. Right now wasn’t the time for that. She needed to figure out what she was going to do.

She suckled involuntarily as she ran through her options. She had to be free in a couple of hours because she needed to lower the sun. Sure, Luna was more than capable of doing so, but if she was absent, a massive search effort would be undertaken. The last thing she needed right now was ponies actively looking for her.

So that meant she needed to at least have her horn freed soon, which made that her primary goal right now. Besides, with her horn freed, getting out of everything else will be easy.

Of course, she couldn’t escape the horn ring in this bathroom. Celestia looked around one last time to make sure she wasn’t missing anything. Sadly, she couldn’t see anything in this bathroom that might help her get the horn ring off.

Sighing, Celestia mulled over what to do next. She dared not step out of the bathroom; if there was even the smallest chance she might be seen, then she wanted to avoid it. So where did that leave her?

Her thoughts were suddenly interrupted by a gurgling noise. Celestia clutched her stomach, feeling a buildup in pressure. For a second, she was confused. Then her ears folded down as she remembered.

The laxatives.

Her throat went dry at the realization that she didn’t have hours before the situation worsened: she had minutes. At best.

Granted, the laxatives she’d taken weren’t fast acting, but she had used three times the recommended amount. Combine that with a rather large breakfast, and lunch, along with her tendency to snack throughout the day and she knew things were going to get… messy.

And she didn’t have any diapers to change into, meaning the one she had on now would have to hold unless she could get it off.

Her determination to escape her foalish garment doubled. Sitting herself on the lid of the toilet to get a better angle, Celestia went back for round two with the diaper. Her bootie-d hooves went and poked at the tapes, tugged at the sides, and even just tried pushing it off. Again, it turned out to be a futile effort.

The diaper stayed snugly around her waist, completely unaffected by all her efforts to remove it. Meanwhile, her stomach continued to gurgle and tighten, and Celestia knew what was going to happen soon.

Biting down hard on her pacifier, Celestia decided the best thing she could do was make her way back to her room. By now the maid should have left, so she would have privacy to… do her business before figuring out how to free herself. The only question was, how to get back?

She knew there were servants walking the halls of the castle right now. Even though the bathroom she found herself in was relatively close, she needed to guarantee herself a way back without being spotted.

“Mmph!” Celestia said, an idea springing to her mind so suddenly that she forgot she couldn’t talk. Face flushing, she prayed nopony had heard her.

The castle has a lot of secret passageways, she thought, once she didn’t hear anything. I’m willing to bet this bathroom has one too… even though I don’t know where it might go.

Celestia began looking around, trying to identify a potential hidden passageway. She looked for cracks on the wall, loose titles, hidden buttons, and anything else that may hold the key to her escape from the bathroom.

Her stomach tightened further, and Celestia did her best to clench her gut. She was going to lose control any minute now… she just hoped her diaper could take it.

But it was worse than that. Her impending accident was also doing a good job of riling her up. Her marehood had already been tingling each time it brushed up against its cushy prison, but now that it was about to get messy too it became harder to control.

Just the anticipation of pooping herself got Celestia’s hoof lowering to the crotch of her diaper. She shook her head to resist, fighting the foggy sensation of horniness in order to think clearly.

Resisting the urge to lose it, she searched even harder now for a secret passage. However, it wasn’t easy. Her gait was spread wide thanks to her diaper, making it hard to cross her legs in an effort to hold off nature’s call. Even though it would only buy her a few seconds at best, they were seconds Celestia couldn’t afford to lose.

Eventually, Celestia’s hoof ran along one of the hinges holding the bathroom mirror in place and it gave a satisfying click. The mirror swung open and out, revealing a tunnel that had been dug into the wall. It was nice and large, almost a perfect circle, and the inside was coated with what looked to be stucco or some similar material. Celestia breathed a sigh of relief upon seeing it. At least now she could get out of the bathroom.

Her stomach gurgled again, and Celestia knew she wouldn’t last much longer. She crossed her legs as tightly as she could and looked deeper into the mirror tunnel. She couldn’t see where it went, and wasn’t able to recall anything specific about it. For all she knew, it might end up dumping her right outside the castle’s front door.

Celestia mulled over her options. She could try and stay in the bathroom for a little while longer, but that wouldn’t accomplish anything. At this point, she knew she wouldn’t be getting out of her diaper without assistance from something. All waiting around would do would give a higher chance to the fact that somepony could walk in on her.

Chewing her pacifier, Celestia came to the decision that she had to go through the tunnel, sooner rather than later. She approached it cautiously, sizing up it’s size. It definitely appeared big enough for her, especially considering all the secret passageways in the castle had been built for her size specifically.

She started crawling in, pushing herself forward as best she could. Her diaper crinkled noisily behind her, and she winced. Biting down on her pacifier, she waited, and hoped nopony had heard. It didn’t seem like it.

Continuing on, eventually her hind legs raised into the air as she got half her body to fit. Using her forelegs, Celestia managed to move forward, her diapered bottom sliding in after her. Before her legs could get all the way in, she gave the backside of the mirror a short kick, knocking it free to swing back into place. She didn’t want anypony getting suspicious if they did come into the bathroom.

When darkness enveloped her, she realized that may not have been such a good idea. She suckled on her pacifier, a little nervous about being suddenly blinded, but it was too late to turn back now.

Celestia kept going, crawling with her belly close to the ground. Her poofy diaper scraped along the bottom of the tunnel the whole time, annoying her to no end. Instead, she tried to distract herself by considering where this tunnel might lead; there were a large number of possibilities, after all. Before those thoughts could really take hold the pressure that had been building up in her bowels magnified.

She grunted and whimpered softly. It was going to happen soon and she knew it. Exhaling heavily out of her nose, Celestia cursed her libido for getting her into this situation.

As long as she could get somewhere safe, isolated, and preferably with something to free herself, it would all work out though. Celestia kept going, taking comfort in that thought and forcing down the urge to use the bathroom.

Then, while crawling a little further, her hoof suddenly slipped as it seemed the ground before it was ripped away. Celestia jerked to a stop, her foreleg made out the shape of a steep ramp. Squinting, she was able to see that the tunnel had led to a very sharp drop off, almost like a slide.

Suckling, Celestia tried to see where it led, but it was just too dark. She tilted her head back, but knew it was pointless to try and turn around now. The tunnel was too narrow anyway.

With a suckle, a sigh, and a clench of her bowels, Celestia realized what she had to do. Scooting forward, she let gravity do the work as she slid down.

Wind whipped by, flinging her ponytails behind her head as she went down, dropping at least a full story before reaching the end of the slide. It deposited into much larger space, but Celestia couldn’t take the time to appreciate it. Her entrance speed was so fast, that when she hit the bottom of the slide she started rolling in an instant tumble.

The world spun around as she did several somersaults across the floor, mercifully stopping before she hit a wall.

As she managed to stop spinning, Celestia tried to get a grip on where she was. For whatever reason, the room she found herself in was brighter than the tunnel, though still very dim. She could make out its size, which was much wider than the tunnel, but about as high. She still had to crawl around.

In terms of space, there wasn't much. It was maybe twice as big as the bathroom had been. Ropes hung from the ceiling and a few support pillars and snaked all around the tunnel, which was weird. It was also dusty, and the corners were covered in cobwebs, a sure sign that nopony had been in here in a long time.

As Celestia continued to look around, she saw a thing metal grate where light was seeping through from the floor. Voices also seemed to be attached to it.

Scuttling over, Celestia hoped that she would be able to get her bearings as to where she was thanks to this vent. The floor below her creaked at the strain of her weight, but she ignored it. Peeking through, she saw several ponies dressed as though they were upperclass and knew it. The voice also became more familiar too.

“We simply do not have the means currently to repave the upper district’s roads. Right now the infrastructure budget is focused on--”

Luna!

Celestia would recognize her sister’s voice anywhere, which meant she was currently in the ceiling space above the throne room! The ropes everywhere suddenly made a little more sense; they were the remnants of a pulley system used by the builders of the castle. She could even remember them being used the day the throne room had been constructed.

But no time to dwell on that now, she had to keep moving. There had to be another passageway out of this room and into a more secure one. Preferably one further away from the crowded room below.

As Celestia shuffled away from the vent, she felt a tug. Looking back, she saw her left hind leg was ensnared by one of the ropes. She huffed through her nose. Just great.

Unfortunately, that wasn’t the biggest problem right now. Her bowels involuntarily pushed, and Celestia realized that when she’d been falling down the slide, she hadn’t been focused on holding the laxatives at bay.

Her bottom raised into the air instinctively, followed by her tail hiking up. Celestia bit down on her pacifier, shutting her eyes and whining out a pitiful plea. No no no no no no no!

But even as she thought that, her body was screaming yes at the chance to relieve itself from all the pressure that had been building. Without even needing Celestia herself to do the final push, it all came rushing out.

The hot mess that had been building up rushed out of her, hitting her diaper and causing it to start sagging almost immediately. Her diaper crinkled and bulged as it took in the huge mess. Celestia grunted and took several breaths as the mudslide just kept coming. She could feel the warm mush spreading all over her backside as it made room for more and more to come in.

She didn’t know how long she spent pooping herself, but it was definitely long enough to fill her diaper to its limit. It sagged, now stained brown, nearly all the way to the floor. As Celestia calmed down, breathing heavily, she lowered her pelvis.

The mess in her diaper squished as it pressed against the floor, shifting in the confines of it’s cushy prison. This jostled Celestia into a blush as her marehood began to burn.

Oh… Oh no… she whimpered softly into her pacifier, the desire to touch herself returning with a vengeance. To think that she wanted this so badly not even a half hour ago, and now it was the last thing she wanted to do.

She crinkled her nose at the stench of her mess, her marehood quivering with arousal.

Celestia tried to move, but each shift only made her hornier as her messy diaper rubbed against her. She bit down on her pacifier, struggling to think of what to do. Despite knowing that this was inevitable, she hadn’t really had the time to plan for it. Now, with her mind foggy from arousal, it didn’t look like she’d be able to think of anything to do about it besides… well… pleasuring herself.

That had been the goal all along, after all.

She shook her head. No, I can’t do that now! I’d be found out for sure. Luna is holding court right below me! All of Canterlot’s nobles are here!

And yet, the threat of such humiliation only seemed to spur her on. Her hoof drifted, bootie making contact with her diapered crotch. It pressed in slowly, the still warm mush squishing against her marehood.

Celestia moaned. She gave into the urges. She had to.

Her hoof rubbed against her diaper, slowly at first, but it quickly devolved as her pelvis desperately humped her hoof back.

Celestia rolled back and forth as she pushed her hoof into the padding, grunting and moaning as she suckled her pacifier. The floor creaked in protest, but was happily ignored. The ropes got tangled up with her as she flopped on her back and rubbed harder, faster. She didn’t realize how tightly they latched on. She didn’t care. The smell of her mess lingered, fueling her even more as she let loose. All the urges she’d been building up for who know’s how long were finally unbridled.

Suckling her pacifier, she giggled gleefuly in between her moans. This feeling was incredible. It was everything she remembered and more. Her marehood was so desperately close to release now.

“Eww, what’s that smell?”

Celestia’s ears flicked at the sound, but she didn’t stop rubbing. Her eyes darted over to the vent, and realized that the smell of her diaper was leaking down into the throne room.

“Good heavens, it’s putrid!”

Murmurings of agreement rose up. Celestia blushed heavily from embarrassment, speeding up once again.

She heard the crowd below shift in discomfort and issue complaints. Ponies sniffed, gagged, and began pushing to escape the stench. Eventually, she heard her sister yell. “Alright! Alright! We will have to end our meeting for today. Everypony you are dismissed.”

Celestia breathed a sigh of relief that she wouldn’t be discovered now. Her hoof dug into her filthy diaper, her marehood finally at it’s limit.

Her orgasm erupted out of her. It rippled through her body in waves, tingling pleasure following. It elicited the loudest moan she could muster. Celestia bit down on her pacifier as the euphoria took over. Her hoof slipped off the diaper, its job done. Celestia panted into her gag, her climax now passed its peak.

She lay there in the aftershock of the orgasm, listening to the nobles clamor out of the throne room.

Out of curiosity, she tried to return to the grate so she could see what was going on, but as she shifted she was met with firm resistance. Looking over her body, Celestia could see the ropes wrapped around her and grunted in surprise. She struggled, hoping to wiggle free. Her messy diaper squished, more gross than arousing now that she’d plateaued.

The ropes held her firmly, the floor whining in protest at her movements. Celestia tried kicking and squirming, hoping that she could get free. She was trapped enough as is with her current attire. She could not be stuck on top of that.

As she wrestled with the ropes, she heard murmurings. Turning her head, she heard Luna’s voice.

“Where did this smell even come from?” Luna asked. She was still in the throne room, but it certainly sounded like she was the only one, considering how much she liked talking to herself.

Celestia struggled harder. She could not have her sister discovering her in this state. The ropes held firm though.

The floor did not.

The stress of her rolling around was too much for it, and it cracked. Celestia’s eyes buldged as she felt her body jerk down slightly. Oh no. NO!

“Huh?” Luna had heard it.

Celestia scrambled. She had to get up and out before the floor--

CRASH!

The floor--or ceiling, technically--bulked under the strain. It burst open and Celestia fell through.

She bit her pacifier as her body fell. For several feet she was unable to do anything as gravity yanked her down. Then, the ropes surrounding her body began to tighten.

Somehow, as she fell, the ropes were pulled taut from their spots in the ceiling. They wrapped around her waist, jerking her to a stop before she hit the ground. Her hind legs ended up pinned together, and her diaper was almost encased by ropes all around it. Celestia bounced in mid-air, her poopy diaper pressed against her body.

As her fall stopped, Celestia found that the ropes had formed a crude, makeshift baby bouncer, suspending her in the air like one normally would. Now with the threat of injury gone, she started to breath a sigh of relief, but nearly choked on it. As the ropes slowly rotated her around, she became face to face with a bug-eyed Luna.

Her sister blinked a few times, looking about two seconds away from passing out from pure shock.

Celestia weakly smiled behind her pacifier, but gave a soft whimper too. Her face burned with shame and humiliation. She'd never been so embarrassed before in her entire life.

She was never, ever going to forget to lock her door again.