Princess Celestia wore a warm smile as she strode elegantly through the long halls of the Canterlot Royal Palace. The tail end of her flowing white dress slid quietly along the immaculate cool marble floor behind her as the dim morning sunlight beamed in through the colorful windows that decorated the walls. However, this gentle light inadvertently revealed the semi-transparent nature of the princess’s white gown.

Viewed from behind, the benevolent alicorn’s undergarments were left clearly visible atop her curvaceous figure. A pristine pair of pink cotton panties adorned the mare’s famously plump posterior, digging deep down into the dark crevice that lay between her cheeks. The scandalous view of them was left unobstructed as her large flowing tail hung suspended in the air behind her, it’s dock wrapped tightly in fuzzy bands which would ensure that it remained out of the way.

Moving up and around the princess’s broad hips, along her narrow waist, and over her smooth belly, a massive pair of breasts left the front her dress hanging down almost a foot ahead of her stomach like a curtain. A rosy pair of perky nipples protruded through the thin fabric, fully erect and quite telling of the alicorn’s current mood.

Colored similarly as the benevolent princess’s panties, a lacy bra seemed especially small when compared to the massive squishy orbs it was being tasked with supporting. Nevertheless, the premium quality material managed well enough from below, though it did nothing to prevent her breasts from visibly bouncing with each of her confident strides. Of course, Celestia was well aware of what the sunlight was doing to her favorite dress, yet she paid it no mind. This was precisely why it was her favorite after all.

Approaching the halfway point in the long hall she’d been traversing through, her gaze flicked briefly to the two stallions standing guard on either side of the hall. Aside from their golden pauldrons, frilled helmets, and the thick flaps of fabric hanging down between their muscular thighs, they were almost as exposed as she was now. Compared to the regular city guard’s uniforms, they seemed practically naked... just the way she liked them.

As Celestia walked past, she casually pretended to not notice as they momentarily broke their stoic composure in order to risk a quick glance at her alluring form. Though neither would dare attempt anything more than that, she found herself honestly hoping for just a little more. Still, their dedication to their duties was certainly admirable.

Putting a bit more sway into her hips as she continued just a few more feet down the hall, Celestia suddenly came to a stop. Having felt the slightest of tremble from her abdomen, a sly grin began to spread across her muzzle. The timing couldn’t have been much more perfect. Biting her bottom lip, she decided that perhaps the meeting she was on her way to attend could wait just a little bit longer. These guards deserved a little show for all their diligent hard work~.

Before either of the two stallions could muster up the courage to ask why she’d so suddenly stopped in her tracks, Celestia let out a sharp gasp and clutched at her stomach. Bending over sharply and wrapping her arms tightly around her waist, the mare’s knees buckled, protruding her ass out behind her for them both to see.

One of the guards started to open his mouth, no doubt worried if she was alright, only to be stunned back into silence as a very un-princess-like sound erupted from Celestia's tightly clenched ass cheeks.

*PrraaAarrpt!*

Immediately following an incredibly loud fart, the alicorn gasped a second time, groaning loudly as she felt her twitching anus rapidly expand.

*Fffrssplortch~!*

The guards’ jaws dropped as they watched the seat of Celestia’s panties darken and then suddenly bulge towards them. A lumpy protrusion continued to grow larger and larger with each passing moment as light brown stains formed at its many peaks. The tent in her underwear’s origin was unmistakable.

Though still struggling to comprehend what they were witnessing, the two stallions were forced to face the realization of what was occurring right in front of them. Princess Celestia, a seemingly all-powerful goddess capable of moving the sun itself... was shitting herself uncontrollably.

Taking full advantage of her guard's surprising state, Celestia quickly reached up and eagerly groped at her left breast, kneading and massaging the sensitive mound of flesh for all it was worth as she continued pushing with all her might. Her mouth formed an ‘ooh’ shape as a horny moan was forced through her pursed lips.

The wet crackling of emerging logs echoed through the hall as her underwear was being packed to the brim with wet and slimy poop. The warping seat of her ruined panties exposed the coils of shit that were piling up within them, leaving no trace of form-fitting shape they once retained. But, as fast as it had begun, the last log of shit in Celestia’s bowels was emptied out into her almost overflowing underwear.

Panting breathlessly from the intense exertion and the explosions of relief and pleasure still sparking throughout her body, the princess finally relaxed her grip on her breast. Instead, she turned her head around slowly, an expression of incredible shame and embarrassment masking the devilish grin hiding underneath.

“Oh my me! I believe I’ve just had an accident!” She gasped out in feigned horror, reaching back and pressing her palm into the apex of the enormous bulge through the backside of her dress. Her whole body shivered as she felt the contained mess smush up against her cheeks, filling any remaining gaps between them and creeping out through the stretched leg holes.

The naughty alicorn chuckled at the sight of the two stunned guards staring directly at the brown hand-shaped mark she’d just left behind on the ass of her dress. However, her panties weren’t the only thing left bulging after her ‘accident’. Much to her amusement, the flaps covering the two stallions’ crotches now feated a long protrusion of their own. Celestia felt her heart race at the confirmation that they had indeed enjoyed their little gift.

Standing up fully and wiping her brow with her undirtied hand, Celestia exhaled slowly, deeply enjoying the weight that now rested within in her panties. Keeping her legs slightly spread so that they would not fall from the immense load, she looked back again at the guards with lidded eyes and a subtle smile.

“My, my, what a messy situation I’ve gotten myself into now~.” She giggled, slowly rocking her hips side-to-side.

The two stallions audibly gulped as they watched the tantalizing bulge sway, finally snapping out of their trance once they heard their princess clear her throat. Face paling, they quickly looked up, only to find the monarch wearing a more seductive expression than either stallion had ever imagined in their lives.

“I do certainly hope I can count on you two to keep this little incident of mine a secret? If you can, I might see to resigning you to a special position inside my private quarters.” She offered with a wink, reaching up and casually wiping off her dirty hand on her other breast, leaving behind a long brown streak. “Either way, I must be getting changed out of these messy panties of mine before my meeting. I should hope to see you two very soon~.”

With that, the alicorn vanished in a flash of golden light, leaving behind nothing more than a tiny brown clump in the middle of the hallway where she once stood. The two stallions shared a look, still in disbelief of what they’d just seen, and even more so, just how much it had aroused them. One thing was for certain, not another soul would be hearing about this...

Author's Note

Might make a follow-up chapter for this at some point in the future, Idk. Will consider it.