The wide open expanse. The risky thrill of getting caught. These were the details that made the Canterlot Castle throne room so tantalizing for Princess Celestia. Just the thought of somepony seeing her...like this made her legs quiver as fantasy dominated actual reality. She had waited for this moment for weeks and every second that ticked away tasted all the sweeter as the anticipation was devilishly stimulating. She was finally here!

She knew there was a very small chance of getting caught, especially during this time of day. The late afternoon was never a time of high activity around the castle as most ponies grew lazy right after lunchtime. Very few ponies even ever visited the castle at this time of year anyway, too busy enjoying the last few weeks of summer while they could. The perfect time, as Celestia planned, to indulge in her secret desires. She had chosen this time perfectly.

A diaper crinkled around her waist, something that was usually quiet had its sounds amplified tenfold by the tall walls of the room. She could hear every rustle of the garment echo off the walls and columns as if reminding her of her naughty deed. It was as if the very walls knew that the Princess of the Sun shouldn’t be in a diaper. She was being very naughty wearing such a thing. Each step made the fresh diaper brush against her inner thighs oh so softly, sending tiny bolts of lightning through her body. Exposed and public. She was actually doing it!

She now stood in the middle of the throne room, dead center of the royal red carpet that stretched far into the distance. Behind her stood a raised platform and some steps leading up to a pair of golden thrones where she and her sister would sit on any given day. To her left and right stood thick, marble pillars that shot high up to the ceiling far above the alicorn. Beyond those columns of pillars were stained glass windows and tall, peaked windows cleaned to a crystal clear finish.

Through the windows she could see a cloudy sky outside. Looked like rain, but what COULD have been there is what really fueled the princess’s active imagination more than what was actually there. There could have been pegasus guards flying by, adventurous ponies spying on the princess during her private time, a zeppelin filled to the brim with tourists peering into the castle. Perhaps even sneaky paparazzi ponies with cameras ready to take a revealing photo of the diapered alicorn. The thought of it all made her breathing quiver. What a rush!

Her thick, white and gold diaper bulged out between her legs, emphasizing her curves with its thick padding. Her legs bowed out broadly as she made no attempts at walking normal with such padding. It’s bulky padding made her waddle, so she allowed them to make her waddle. The plastic diaper crinkled with each step she made. No matter how much she tried to be graceful or normal, her diaper would always crinkle to remind her of her embarrassing state. She was in a diaper and it would be difficult to forget that. Not that she wanted to. She was diapered and out in the open and she couldn’t have been happier!

She took one last glance down the length of the throne room as her back legs stepped wider apart. Not a soul in sight, but there was so much open space. So many places for ponies to hide and spy on the diapered princess. So many nooks for hidden cameras to conceal themselves. In reality, she wouldn’t have to worry about any of these things actually happening, but fantasy made the very idea of them existing enticing for the diapered princess. A reality she'd dread, but a fantasy she lusted over!

A pressure grew in her gut as a smile grew on Celestia’s face. It was time. All that cider and cake she filled up on not hours ago as a second lunch were finally reaching their end. She slammed her eyes shut, shamelessly thrusting her rump into the air. She pushed with all her might, bearing down on her full bowels and bladder. Years of potty training tried to interfere, but she pushed right past those initial instincts. She wanted this. She wanted this exposure!

Her bladder was the first thing to go. After some careful shifting and relaxation of her muscles, Celestia was soon rewarded with a loud hissing that gurgled and sprayed into her diaper. The thirsty padding swelled between her legs, quickly warming up with a yellow spot that quickly appeared and spread far across her absorbent diaper. The white face of the padded garment quickly darkened and yellowed, advertising to the invisible crowds she performed for that the Princess of the Sun, had in fact, wet herself. How very naughty and unprincess like of her!

Her bowels followed shortly after. Once her bladder had opened the doors to her public diaper fill up, Celestia found it much easier to mess herself. Perhaps it was tapping into some long forgotten instinct that she had overlooked when she was no longer a foal. Perhaps its was just her body’s way of figuring if she already wet her diaper, there was no reason to stop her from going all the way. Whatever the reason, her bowels were finally obeying her command, and Celestia soon felt the pleasurable release of publicly pooping herself.

The mess started small and slow, pushing out the back padding of her diaper before the load plopped into the midsection where the diaper hung so grossly behind her. A satisfied moan slithered out of her mouth as she continued to push, filling the diaper with a hefty load that she had been saving up specifically for this occasion. The firm but squishy load filled out any wrinkles in the diaper that her urine failed to even out as she continued to publicly soil herself.

Her eyelids flickered as she took in a shaky breath. Her wings vibrated with a pleasurable buzz. What a rush! She had actually soiled herself in public! There she stood in the middle of the throne room, wide open space in all direction, and she was in a diaper, a wet and messy diaper.

Without turning her head, Celestia hooked a hoof around to press into the lumpy back of her diaper. She could feel the squishy material ooze about as her hoof pressed it into her rump. The touch felt electric as she gave the new mess a series of testing squishes. The feeling tingled as she squeezed her thighs together. That was one wet and stinky diaper.

Celestia giggled, wiggling from hoof to hoof like a happy toddler. She actually did it! What a rush! She felt like she could have danced and giggled all over the throne room like this. And nothing would get in her way!

Suddenly she heard a deep voice clearing his throat, causing her blood to instantly run cold. Her neck snapped back behind her to see a golden armor clad unicorn guard staring back at her. The color drained from her face as her eyes widened. She stared back at the guard completely paralyzed with fear. Her mouth hung open, petrified, as words failed to form.

The guard didn’t break his straight expression, despite seeing the proud Princess of the Sun standing before him in a messy and wet diaper. His intense military training made sure his ramrod poise was unwavering. “Princess Celestia, you have a...visitor.”

The cyan maned unicorn stepped aside as he motioned towards the pony behind him. Twilight Sparkle, Princess Celestia’s most esteemed pupil stood there slack jawed and wide eyed. The purple unicorn stared at Celestia with equal amounts of surprise and fear as they could only blink at each other.

Celestia’s cheeks now flared up a bright red, redder than she ever thought possible. She fantasized about being exposed and caught, but only in the realm of conjured fantasy. Now that she was finally experiencing it for real, she could only feel cold terror and intense humiliation. This wasn’t what she wanted!

“Twilight!” the stammering princess exclaimed, “please don’t look!” In a fit of panic, all she could think to do was cover her blush covered face with a white wing and cover her diaper as best as she could with her tail. To no avail, the diaper still bulged out predominantly behind her.

Twilight only blinked, hardly able to comprehend the sight. “Princess?” the dazed purple unicorn simply replied, barely able to react.

“Please...don’t look!” Celestia repeated with a squeaky voice, “leave at once!” She forced every ounce of authority in her command, but only ended up with what sounded like a weak, pleaful whine.

The guard hardly hesitated, too disciplined to fully react at the strange sight. He quickly bowed his head and trotted down towards the throne room’s exit. There was no doubt that his loyalty and training as a guard would prevent him from blathering on about what he just saw. He wouldn’t tell a soul, there was no doubt about that.

Twilight on the other hand was a loose end. To the panicking Celestia, a loose end was just enough to expose herself to the entire world. Even a well learned pony like Twilight Sparkle whom knew the princess for years couldn’t be trusted with such a secret. She couldn’t let the unicorn simply leave knowing what she knew. This was something she couldn’t let happen.

The shocked unicorn took a moment or two to finally budge from her spot. She started by stammering a panicked apology as she struggled to fully digest what was going on here. She slowly turned around and made a frightful dash for the main doors, too embarrassed to even say goodbye to her mentor.

Out of nowhere Twilight suddenly felt her limbs freeze up like they were made of stone. She was stopped dead in her tracks with a forehoof raised off the ground in a half step. She strained against the mysterious force that suddenly overtook her body, unable to break free. She was stuck! Looking closer at her frozen hooves, she could spy a faint, golden aura glowing around them.

“I-I’m sorry, Twilight, I have to fix this,” Celestia stated. Her horn began to glow gold and then a bright white. Soon the light grew to such power that it blinded the two, engulfing the room in its bright radiance.

Author's Note

After a loooooooong hiatus, I return with a small story I've had on my writing desk for quite some time. This story is a bit on the experimental side of things in that it contains multiple endings. While brainstorming for this story I couldn't settle on just one ending, so I decided to experiment with multiple options. Technically the "official" ending is the last chapter marked "The End", but the chapters in between experiment with other themes I felt like exploring.