Equestria's Diapered Deeds

Applejack and Rainbow's latest competition came with a heavy price: the losing pony had to wear a diaper for a full day without taking it off, no exceptions. Applejack knew Rainbow suggested such a steep penalty only to embarrass her, but the thought of turning the tables on the pegasus and relishing in her defeat was too good for Applejack to pass up. Though it was a very close fight up to the very end, Applejack succeeded in making Rainbow eat her own words.

Rainbow was still going to have the last laugh. Sure, she was stuck sitting in her living room wearing an enchanted diaper she picked up from a wandering trader with no hope of removing it until the following morning, but Applejack didn't need to know that. All the farm pony needed to know was that Rainbow put it on and didn't have some secret way to back out and take it off. After that, she left the rainbow pegasus to get back to her chores.

This meant that Rainbow was all by herself, with nothing to worry about for the day and nowhere she needed to be. She could just hide away and ride this out, maybe use the diaper a couple times if she really needed to, but who would care? It wouldn't be any inconvenience to her, that was for sure.

Rainbow noticed that she could already feel a small pressure building up in her bladder, and she chuckled to herself. What, was she supposed to be worried now that the possibility of wetting herself was inching closer? Ha. Wasn't gonna happen. She wouldn't let this stupid bet get the best of her. Why she could wet herself right now and it wouldn't even matter one bit.

Then she realized she actually did wet herself, her bladder apparently holding in a lot more than it let on; the front of her diaper was pretty soaked. Rainbow was sure that she was better at holding than that, but again, what did it matter? She was so confident this wouldn't beat her that she smacked the front of her diaper right between her legs, almost doubling over herself from the sudden warmth that encapsulated her pussy. Okay, maybe don't do that.

The following hours were just as perplexing. Not only did she piss in her diaper almost without her own input, but it was happening pretty frequently too. Almost every hour she felt a slight buildup, and before she knew what was happening it emptied into her swollen diaper. By the time lunch had rolled around, her latest soak had started to seep through and spill onto the floor, and a small puddle was sitting at the base of her diaper, threatening to splash out of the leg holes if she attempted to sit down. Rainbow had to admit, this was a bit more annoying than she had anticipated.

Things only got worse after lunch, as she began to feel a pressure prodding her anus. Okay, peeing herself was one thing, but she was absolutely one-hundred percent not about to shit herself even alone in the confines of her own house.
She was better than that. Nope. Absolutely not. Not gonna happen.

Her poop began sliding out and coiling in her diaper, tenting it out her behind just enough to spread her gait a little wider, and fill the empty space in her diaper. Great, now she had to walk around feeling like she was carrying a bowling ball between her legs. The diapers weight subtly swung back and forth with each step, reminding Rainbow of the dirty things she's been forced into doing.

This sucked. She couldn't walk because her momentum rubbed the shit in her diaper against her ass. She couldn't just stand; even with her endurance, her legs would get too tired very quickly, especially with the diaper's girth forcing her legs wider than they'd normally be. She absolutely couldn't sit down, she'd make an absolute mess of any of her chairs, and all her chairs were too comfortable to waste on such a thing.

And all the while, the piss kept coming, a substantial wave pouring out and soaking what few dry spots remained, as well as adding to the now larger puddle situated at the bottom of her sagging diaper. Rainbow didn't even drink that much, so she had no idea where it was even coming from.

Maybe Twilight was onto something about checking warning labels or whatever it was she said. Rainbow slowly moved to her closet, having to stop as a fresh turd sinking out of her ass as she moved and more weight and girth to her diaper. With it now hanging just above her knees, she resumed her pace, arriving at her closet and rummaging for anything that may have come with the diaper. Her fingers brushed against a small tag, and she quickly yanked it out and read its contents.

"WARNING: This garment is classified as cursed. Will expose wearer to their most personal diaper experience."

Rainbow wasn't sure what that was supposed to mean. Does it mean it was supposed to be like an extremely taboo wish fulfillment? If so, this isn't what she would've wanted out of this.

Another torrent of piss flooded into her diaper, causing her to moan slightly. If it wasn't supposed to be wish granting, was it supposed to be like a punishment? Rainbow could see that, as she hated every second of this mess, but somehow couldn't bring herself to fully believe that someone decided that the best way to curse someone was to make them mess themselves over and over in a garment that they had to put on.

She felt a building pressure in her ass again. Whatever this was, it was replenishing faster and faster; Rainbow hoped that the diaper was strong enough to handle everything it caused as the largest poop so far escaped her ass and ballooned her diaper almost down to her shins. The weight was becoming too difficult to carry with her, her legs forced so far apart that the diaper might as well be touching the ground already. Rainbow didn't want to try to fly with it; one wrong wing flap would send her ass straight into the mess it carried.

Come to think of it, anything she tried to do would inevitably end with her sitting in her own shit, especially since she still had over twelve hours to wear this thing. As the next stream of piss poured out of her, Rainbow realized she didn't really have much of a choice.

She found the most open spot in her house and slowly bent her knees, letting the bottom of the diaper start to smush against the floor. It immediately started pressing back against her nether regions, a small moan escaping her lips. She leaned herself back and let her ass slowly sink into the massive pile of shit in her diaper. the slight arousal coaxing the next log of shit to leave her ass, pressing right back against her cheeks with no where else to really go. Rainbow moaned even louder, letting herself sink fully into her diaper as it billowed out both in front and behind.

There she remained for the next several hours, every few minutes more piss and shit rushing out to expand her diaper further and further, some of the excrement seeping out the now gigantic leg holes. Each new log added to her inexplicable growing lust as she gripped the front of her diaper tightly and forcefully thrust her pussy against it, grinding it and crying out in ecstasy as she did. Her climax swiftly overcame her, a fountain of juices spurting against her diaper and only adding to the soiled garment.

Rainbow fell back, thankful that the diaper had grown so large that she was able to lay down and use the back end of it as her bed for the night. She certainly wasn't getting into her normal bed tonight.

Rainbow stirred, her eyes adjusting to the first traces of sunlight gleaming through her window. She lifted herself from her makeshift bed, finding herself almost midway up to her ceiling. She shook her head and looked beneath her, the diaper now having become a small mountain in her sleep. She wondered just what the hay she was going to do with it now that it was basically impossible to move.

She didn't have to wait long though, as the twenty-fourth hour ended and all that filled the diaper magically vanished, leaving Rainbow sitting on her floor in the now unfastened diaper. She looked around and spotted the small warning tag that came with the diaper. She picked it up and her eyes landed on one word in particular.

"Reusable."

Rainbow's gaze shifted between the tag and the diaper before she tossed the tag over her shoulder and fastened the diaper back on.

She didn't have anything better to do that day.