Sweetie Belle's Magical Mistake: Swapped Bodies and Soiled Diapers

Rarity trotted her way down the streets of Ponyville, she'd done this plenty of times before, but this was the first time she was seeing it from this angle, not to mention the constantly crinkling at her every step, was more than a 'little' annoying to her, but she kept moving. Despite constantly thinking every pony was looking at her, no pony was, there were no second glances at the filly trotting down the street in a diaper, it wasn't unusual or out of the ordinary, for Rarity it sure was, but no one knew it was her, they only saw Sweetie Belle, and despite knowing that was the case, Rarity still couldn't help but feel somewhat jittery as she made her way towards Sugar cube Corner.

There were a lot of positives going for her right now, it was later in the day, which meant not as many customers around, Sugar cube Corner saw much more activity during the morning to late afternoon, as it approached the early evening, most ponies stopping in were likely getting something for desert at home later. As long as nothing went awry, this should be a very simply task. Once she got to the front door of the establishment, Rarity took a deep breath, and exhaled.

"Okay Rarity, just go in there, tell Pinkie Pie that Twilight needs her, now, and escort her back. Simple, easy."

That's what she told herself right before heading inside. Like she thought, the place was fairly empty, a few ponies were seated, enjoying confectioneries, but there were two ponies there she was not looking forwards to seeing. Apple Bloom and Scootaloo. Before she could scamper away, the two fillies noticed her and waved her down.

"Sweetie Belle, there you are, we've been waitin' here ferever for you to show up."

Apple Bloom's voice cut across the room as clear as day, Rarity wanted to ignore them, but she couldn't, not because it would be weird or anything, but because those two would end up doing 'something' to bring far too much attention to her. So altering her plans, she went towards the table those two were seated at. All she had to do was explain she was busy, and then continue with her task. As she got to the table, she hopped into one of the chairs, only to immediately be met with a cupcake to the face.

"Here Sweetie Belle, we've been saving this one for you."

Scootaloo said while pushing the cupcake into Sweetie Belle's mouth, forcing Rarity to start eating and swallowing the admittedly delicious pastry. After quickly eating it, she coughed a little.

"Look at what you did Scootaloo, here, drink some of this."

And before Rarity could even contemplate Apple Bloom's words, a bottle of soda had been forced into her mouth, she began swallowing the sweet cola, if only to stop herself from choking on it, drinking the bottle until it was completely emptied, once it was, it was pulled out of her mouth, leaving her feeling slightly dazed, and a little nauseous. A full feeling in her stomach after downing both the cupcake and the drink, though that feeling soon began to rise as her eyes widened and before she could even attempt to stop it a booming.

"URRrrulp!"

Echoed out of her mouth. Both the other fillies began to giggle as they said.

"Nice one!"

In unison. After that transpired, and Rarity had hold of her senses and wasn't being force fed, she picked up a nearby napkin and began to wipe the bits of frosting stuck to her muzzle.

"Huh, is Rarity rubbing off on you Sweetie Belle? I've never seen you use a napkin to wipe your face before."

Scootaloo commented, and before Rarity could say otherwise, Apple Bloom spoke up.

"After that belch? I reckon Rarity might have fainted if she'd heard that."

Which made Rarity narrow her eyes a little, but she quickly got over it, she wasn't here for this, she needed Pinkie Pie!

"Girls please, I know you were uh, waiting for me, but I have something quite impor-"

Rarity find herself losing her voice as the rather delightful smell of the bakery was suddenly cut off and replaced with that oh so familiar scent of fresh horse apples. She couldn't help it as she suddenly gagged. A moment after that, Scootaloo raised her hooves over her nose.

"Oh jeez Apple Bloom, how long were you holding that in!"

The Pegasus filly began flapping her wings to mitigate the stench as Apple Bloom had a sheepish smile on her face.

"Well it's been a while since I last ate, and I weren't holdin' nothing, it just happened to come out now is all. Sides, I don't know what y'all are complaining about, I've smelt your dirty diapers too, and they aren't any better."

Rarity finally regained her composure, doing her best to cover her nose with her hoof, she was actually breathing heavily to block the scent of filly manure with her breath, which smelled of cupcakes and was much preferable.

"Girls!"

Rarity exclaimed, getting there attention once more.

"Like I was trying to say, Twilight needed me to do something really important as part of my magic training, which is why I was late, and which is why I can't stay, she needs me to get Pinkie Pie for her."

Both the other fillies looked at her for a moment, seemingly onto the fact that things weren't quite what they seemed.

"Okay. See yah tomorrow Sweetie Belle."

Scootaloo said as she hopped off her chair.

"Bye Sweetie! Hope your magic stuff goes alright."

Apple Bloom added as she hopped off too. Rarity watched the two of them head out the door, her eyes fixated on Apple Blooms full diaper as it swayed back and forth as the filly trotted out. Taking her hoof away from her face as the scent of dirty diaper quickly dissipated, and the scent of baked goods reigned supreme once more.

"Thank goodness, now to get Pinkie PIE!"

Rarity had turned her head back around as she said that, finding Pinkie Pie directly in front of her, scaring her right off of her chair and onto the floor.

"I heard you were looking for me!"

Pinkie Pie stated, with a level of enthusiasm that only Pinkie Pie could constantly bring to the table, Rarity didn't even bother thinking about how Pinkie Pie had known she was here for her, it just saved her the trouble of finding her at the very least, picking herself up off the floor, Rarity shook herself for a moment and looked up to Pinkie Pie.

"Pinkie Pie, I'm here tough!"

Rarity yelped out in disgust as she suddenly felt the party pony's tongue slide against the side of her face.

"You had a little frosting stuck there, don't worry, I took care of it."

Pinkie Pie said as she smiled down at Rarity, who just fumed inwardly at the situation as it transpired, only keeping her cool knowing that Sweetie Belle wouldn't be upset by that, so she had to maintain her composure. Though after her sudden snack just a few moments ago, she was feeling a lot less confident with herself, in fact, she was feeling a little uncomfortable, but she brushed the feeling aside as she began to speak again.

"Pinkie Pie, I'm here because-"

"You need a diaper change?"

Pinkie Pie said as she was suddenly behind Rarity, hoof pressing against the back of her diaper, feeling it poking her flank.

"Oh wait your clean, I could have sworn-"

Pinkie began, only for Rarity to interrupt her this time.

"Pinkie Pie!"

Rarity stamped her fore hooves onto the floor for emphasis.

"I do not need a diaper change! If you're smelling a dirty diaper, that's because Apple Bloom just left and took hers with her."

Rarity said, feeling the need to clarify her diaper was spotless.

"Now, I'm here, because Twilight said she needed you to come over right away!"

Rarity shouted out.

"Oh, okay!"

Pinkie Pie replied in turn, still standing behind Rarity, who let out an exasperated sigh at finally getting Pinkie to listen to her, she could feel herself relax as she knew all she had to do now was get Pinkie Pie back to Twilight's. That's when disaster struck. The feeling of relief washed over Rarity in more ways than one as her tail hiked up, a sudden twisting knot formed in the pit of her stomach as Rarity instantly recognized the feeling.

"No, no, no!"

The mare pleaded to herself as she desperately tried to force her sister's body to clamp down tightly on the feeling inside of her, but after a few mere seconds of holding it in, the knot began to slide undone and Rarity felt a mixture of blissful relief and pure disgust wash over her as her fore hooves shook for a moment before lowering slightly, raising her rear end sky-high as her bowels began to empty. It was like a faucet had been turned inside her body, one she had no means of stopping as a sloppy muck began to empty out of her backside, landing right into the waiting diaper. The smell of her shame spread around her, fighting off the delectable scent of delicious backed goods and replacing it with the murky mire of manure, feeling the diaper tugging downwards as it filled slowly over the course of the next minute, though it seemed like an eternity to Rarity as she could do nothing but feel the waves of pressure sliding more horrifying sludge out of her, until it stopped.

Rarity began to breath heavily, taking rapid breaths, as if she hadn't breathed at all while soiling herself. Before she could even begin to come to terms with what had just occurred, she felt herself being lifted around the belly.

"Well, I better take care of this quick before I go, I know how much Rarity hates changing poopy diapers!"

Pinkie Pie exclaimed as Rarity felt her face heat up as every pony else was made aware of the accident in her foal pants. There was nothing she could do to get out of this situation, even if she didn't have Pinkie Pie dragging her to a changing table right now, it wasn't like she wanted to stay in this filthy thing! Of course, ever fiber of her being had wanted to avoid this particular part of being her sister, but it had happened, and so suddenly too, it just hadn't given her enough time to process the whole ordeal, and before she knew it, she was in the Cake's nursery, being laid upon the changing table, a table where foals had their diapers changed. Rarity simply stared up at the ceiling as the sounds of the diaper tapes being pulled back could be heard. She didn't even wan to look at Pinkie Pie, knowing how the Earth pony would be handling the diaper change made bile rise up in the back of her throat.

"Whew! What has Rarity been feeding you!"

Rarity heard the comment and wanted to simply vanish from existence. The thought of thinking of the food she'd made before leading to this, it had her mind reeling, she was trying to distance herself from the whole situation, but Pinkie Pie had brought her right back to it with one innocuous statement. Soon the diaper was pulled out, she felt it slide against her body as Pinkie Pie used it to scoop up most of her waste. Then came the wipes, the coolness was Rarity's saving grace, she was being cleaned up, it was demeaning, embarrassing, but it was coming to an end.

Rarity found herself enjoying the feeling of the muck getting wiped off of her, which caused her concern at first, but she shook her head. She was getting clean, of course she would enjoy that. Although as the scent of foal powder joined the mix, Rarity quietly sighed to herself, the smell hadn't gotten overly better, now it simply smelled like Sweetie Belle's room as opposed to just smelling of soiled diaper. With the powder applied, her flank was lifted, a new diaper slid under and her tail tucked into the hole. It was taped up and Rarity found herself on Pinkie Pie's back. All in all, that had only taken a fraction of the time it took Rarity to change her sister, and Pinkie Pie didn't have any magic! Which just showed how much Rarity despised the task in general. But that was soon getting pushed to the back of her mind, all of it was.

"Twilight needs me! Be back later!"

Were the last things Rarity heard before she headed back out, with Pinkie Pie carrying her, at least her mission had been successful, for certain definitions of success anyway.