Fluttershy and Rarity step through the doors of Carousel Boutique, Rarity having wet herself a little out of embarrassment.

"Everypony saw me, it was just AWEFUL!!!" Rarity whined.

"Oh, Mommy... you're such a naughty filly, stinky-butt!" Fluttershy teased, seductively.

"What are you talking about, I had to go, and there were no bathrooms!" Rarity protested, "You're the one who can't make it when the toilet is literally right down the hall! I just bought you Pull-ups for crying out loud!"

Fluttershy, ignoring her, pressed her hoof into the back of Rarity's padding. A loud moan escaped from Rarity's muzzle as her squishy mess was rubbed into her sensitive regions.

Rarity quickly clapped a hoof over her muzzle as she heard herself. "Oh my... I think somepony really likes her diapees!" Fluttershy teased as she continued to spread the mess.

"Fluttershy stop! There's manure where manure... shouldn't be!" Rarity said, wincing.

"Yeah... somepony's been very naughty..." Fluttershy wasn't listening, "I think we're gonna need to punish you..."

Rarity's eyes went wide. This is it Fluttershy thought I'm finally getting her back for today!

"Sweetie, stop right now! Mommy's gonna count to three!" Rarity threatened.

"Three." Fluttershy said simply, and almost instantly, Rarity was bent over being spanked by her foal. Her mess splattering EVERYWHERE!

And she was loving it.

She wanted to mess herself more now, the punishment was so envigorating. She let out soft moans with every spank.

"Oh, RAVISH ME MOMMY!!!" Rarity shouted eventually.

"Mmm..." Fluttershy chimed, licking her lips, "I thought you'd never ask..."

Fluttershy slams Rarity down and practically rips her soiled diaper off. She, of course, stops to clean Rarity's... stuff..., then slowly runs her tongue along her clit.

"Oh my..."

"You like that, baby?" Fluttershy asks.

"I'm not a baby!" she whined, "But yes..." Rarity admitted, face aflush.

"That's good..." and with that, Fluttershy drove her hoof into Rarity's tight virgin hole, getting an onslaught of moans from Rarity.

"Keep going, I'm so close, sweetie!" Fluttershy rubbed faster, and faster as Rarity moaned louder.

"Oh Celestia, yes!!!" Rarity screamed as hot marecum poured out of her... into her diaper. She simply basked in her lust-filled euphoria for the longest time before

"Um... Fluttershy, I thought you threw this away." Rarity said, confused by the soiled garment which now sagged between her hind legs.

"This way there's no mess to clean up." Fluttershy explained, "I put it on you just before you. . . you know."

"Oh..." was all Rarity could say.

"But, you still have to drink your baba, then I'll let you out of that messy thing..."

Fluttershy handed her a bottle filled with apple juice as she gulped down her own. Rarity shrugged and grabbed it, slowly suckling out a little sweet liquid at a time. When she finished, she felt a pain in her stomach. She quickly realized what was happening.

"Fluttershy, baby? You didn't put anything in Mommy's drink, did you?" she asked, clutching her stomach.

"Just some... er... powder..." Fluttershy admitted.

That's when Rarity felt it. The flurry of manure squished loudly as she messed her already soiled diaper. She felt load after messy load squeeze its way out of her as it filled the garment, causing it to sag towards the ground, and filling the air with a foul odor.

"Oh my... I think were gonna keep you in those until you can make it to the potty on your own like a big girl." Fluttershy cooed.

"What? You can barely do that!"

"I'll learn. Until then, Mommy's gonna change your dirty diapees, m'kay?" Fluttershy asked, not wanting to take no for an answer.

"This was fun, but I'd rather not use these all the time. It's not very lady-like." Rarity argued, "Besides, you can't even change your own diapers, how should I expect you to change me." Rarity was hiding it well, but she really wanted to be babied for a change. She loved that everypony could see her accident. Rarity the little baby foal. It had a nice ring to it, as she said it in her head the whole walk home.

"Well... how 'bout we hire a nanny then?" Fluttershy suggested, "Somepony who wouldn't mind taking care of both of us. I could be like your big sister!"

"OMG YES!!! SQUEE!!!" Rarity screamed excitedly. Upon saying this, she looks over at Fluttershy's wide smile. It takes a minute for it to click. "Um. . . did I say that out loud?" Rarity asked, nervously.

"Teehee, it's nothing to be ashamed of sweetie. Lots of little fillies like it."

"W-Whatever..." Rarity shrugged, her face flushing a deep crimson. "Wait. . . why are you the big sister? You can barely make it to the potty!"

"Yeah, well, I'm about to start potty training, but you just messed yourself. AND you liked it," Fluttershy argued, "so I think I'm older than you. We'll say I'm probably, like, three, while you're almost two. That seems reasonable!"

"Ugh. . . fine. . . ." Rarity gave up. She wasn't gonna argue about such a thing. "So. . ." she began to ask, "who did you have in mind for our 'nanny'?"

"Oh. . . I think you might know her." Fluttershy teased, letting out an excited giggle. "Nopony special. Just THE PRINCESS OF FRIENDSHIP!"

Rarity's eyes went wide at this.

"But before we start discussing that, I think I know I certain filly who needs her diapers changed!" Fluttershy said as she knelt down next to Rarity as she got into the familiar position. "Just walk me through it."

Outside the window of Carousel Boutique, Celestia's sun could be seen settling upon the horizon. . .

I can't believe I got her back began Fluttershy's last thoughts as night descended upon Ponyville.

Maybe I am a little naughty. . .

Author's Note

And that concludes Naughty Fluttershy!

I knew y'all were waiting for it, they finally RAVAGE eachother! Yay!

I hope to make a sequel, but first, I'ma get "Comet's Daddy" out of the way. I know I've been putting that off, but there's a reason for that

It was outside of my comfort zone. I hadn't written guy stuff before until then, it was entirely new territory. Then I fell in love with this and just stopped writing for that story. I've done research since then, however, and I think I know what I'll do with it now