Gentle Press let out a long sigh as she stared out her dining room window, watching with lidded blue eyes as raindrop after raindrop trickled down the other side of the fogged glass. A steaming hot mug of coffee rested atop the small wooden table she was seated at, the fingers of her right hand curled around its smooth white handle.

With the exception of the constant pitter-patter of the rain against the window, it was almost completely quiet. Distantly, she could hear the clock above her kitchen stove ticking away somewhere behind her as it slowly approached three in the afternoon. At the same time, a pleasant tingle caused her toes to curl as a light breeze tickled the bottom of her bare feet.

For the first time in far too long, Gentle had nothing to do for the rest of the day. Be it work or her university classes, this light grey pegasus had been continuously kept busy for the past few weeks and only recently had she able to find some time to wind down and relax in peace.

It certainly felt well deserved, and the surprise rainfall outside was making today even better. She'd always found the sounds and smells that came with a gentle rainstorm immensely satisfying, especially the way it made her wings tingle and quiver. She couldn't get enough of it.

And unlike in Manehattan, where she was raised, rainstorms were pretty common around here. Though her original reason for moving to the 'chaos capital of the world', also known as Ponyville, had been to attend the Princess Of Friendship's new 'School Of Friendship', she'd come to enjoy the growing town and its many quirky inhabitants.

Scratching the top of her head, a lock of her light brown mane fell in front of her grey muzzle, looking tangled and messy. With a puff, she blew it aside. She usually kept her mane in a neat ponytail, but today it didn't seem to be in the mood to cooperate. Not that she really cared all that much about that right now. With nowhere to be after this morning's classes, she felt no immediate desire to fix it.

She had at least changed out her school uniform, well, the more uncomfortable bits anyway. She still had on the white, currently unbuttoned, collared shirt, as well as a pair of plain grey panties. Both her skirt, leggings, and bra had all been discarded somewhere on the floor of her bedroom almost the moment she got home. She did plan on getting changed into something a bit comfier a little later, perhaps some pajamas, but for now, she was perfectly content to just sit here by the window and listen to the sweet sounds of nature.

As she sat there, taking another sip from her mug, she chuckled to herself as she imagined how a few of her not-so-subtle admirers from class would react if they saw her like this. Laid back in her kitchen, large breasts only concealed by either side of her shirt, and while wearing only a pair of panties. Most of them thought of her as nothing more than a 'high-class hotty' from the big city, a proper and polite noble mare ready to be wooed and corrupted by their rustic country charms.

If only they knew...

About thirty minutes later and Gentle Press was still sitting at the window, her cup now half empty. A tiny tremor rumbled from her belly, breaking through the near silence that had fallen over the apartment. She could feel her insides shifting and adjusting as, a few moments later, a faint presence began to make itself known deep within her bowels. It was a considerable weight that slowly moved down through her large intestine, likely her breakfast from earlier this morning.

It wasn't until another much more powerful rumbling was felt that she finally registered a pressure that prodded at her 'back door'. Her tail was flagging instinctively, signaling to her the growing need for a quick trip to the bathroom.

But despite this clear warning, Gentle remained firmly seated, seemingly ignoring her body's calls for action and instead choosing to lean to the left as she felt the pressure continue to mount in her colon. Supple, round butt cheeks facing out as she leaned on her side, she wore a sly smirk but otherwise kept staring out the window. Though her thoughts were now focused elsewhere.

A few more seconds went by when suddenly the pressure pushing against her anus tripled in an instant, before being relieved just as quickly in the form of a long and pungent plume of warm gas that escaped into her panties. Gentle sighed in relief as the level of urgency fell to a more manageable level, though it continued to grow. Sniffing, her nose scrunched as she caught a whiff of her expulsion. It carried with it the telltale signs of what was soon to follow.

But even then, she remained where she was, not moving an inch as she slowly grew more and more desperate. As time continued to tick by, more short bursts of warm air continued to rip from between her cheeks, each one a little bit wetter than the one before it.

"Ough~" Gentle grunted, leaning a little further and putting down her mug. She could feel a heavy mass waiting impatiently inside her, demanding to be released.

Reaching back with her now free hand, she let it slide down over her slightly bloated stomach and hip, fingers drifting down to pull back one of her cheeks. Her panties had sunk down into her crack, and a tiny brown stain was visible over a small depression near the center. She idly prodded at the depression with the tip of her index finger, causing her tightly clenched anus to quiver and tremble from the ticklish sensation.

Suddenly, another burst of gas slipped free, sputtering loudly and leaving behind a thin brown line across the inside of her panties. It was time, and she was more than ready.

"Urngt~" She grunted, jaw clenching as she started to push while also releasing the hold she had been maintaining on her anus.

Instantly there was a gassy crackle as she felt her hole start to widen to make room for her first log. Within moments a small bump pushed out the seat of her panties, growing bigger and longer as it stretched the fabric to its limit. Gentle winced as she felt her asshole spread, the thickest part of her log pushing past the rim as she delivered one last decisive push. The once tiny bump had transformed into a massive mound in mere moments, pulling the fabric down from her ass as a massive turd sagged down inside her panties.

Sharp tingles of pleasure rippled across her body as Gentle felt another dense column of shit glide out of her behind the first one and coil in over itself inside her underwear, fingers digging deep into her malleable ass cheek as she relished in the naughty feeling that always came with purposefully pooping her panties. At this point, she had no power to stop her bowel movement, even if she wanted to. As the second log finally tapered off, more manure was quick to follow. Requiring no assistance from her, a rush of semi-solid sludge flooded out around the tail end.

The thick and watery muck stained straight through the grey fabric, turning her panties a wet brownish color as they were filled to the brim with liquid shit in only a few seconds. She could feel the mess spreading up through her crotch, coating her already dripping wet marehood with a layer of filthy brown muck.

The continuous flow proved too much for her panties to fully contain as poop began seeping out, spilling out over her left ass cheek like a muddy landslide. The soft poop continued to ooze out, making it appear if a wet and muddy grapefruit had just become nestled in the seat of her panties.

But then, just as it seemed like the pool of runny shit that was growing around her ass in the chair might spill over the edge and fall down to the floor, the rush of shit from her asshole finally slowed. Gentle was panting heavily at this point, not moving in her chair while still staring out the window. A satisfied smile was spread across her lips.

"Ahhh~ Much better." She moaned, squirming as she felt her poop-smeared pussy tremble as it begged for attention from the naughty mare.

Using the same hand that had been holding up her right ass cheek, she moved it down over the massive bulge and pressed her palm firmly up against it. A shiver ran up her spine as she felt the mostly contained mess squish and squelch up into her already quite filthy butt crack. She took in a deep shaky breath, yet remained unfazed by the intense odor now stuffing the room.

Pulling her hand back, she giggled upon seeing the damage. Her palm was smeared with several dark brown smudges. Clearly the fabric had not been strong enough to contain a load of that consistency and size. It was undoubtedly one of her biggest in a very long time too.

As she rubbed her dirty hand off on one of the few remaining unstained areas of her panties, she glanced up fondly at a small brown plastic wrapper sitting on the table just behind her mug.

'Mego-Lax' It read.

Giggling, she turned back to her still swirling coffee mug and downed the rest all at once.

"Let's see if I can't make this mess any bigger~."

Author's Note

The introduction of my OC: Gentle Press! Had been toying around with making her a thing for a while and decided to finally do it here. Hope you enjoyed her naughty antics!