She gasped loudly.

"What the... Where am I?" She looked around, and quickly spotted her friend, Fluttershy.

"Fluttershy?!"

Fluttershy woke up with a gasp, similar to Dash.

"Huh? Where are we?"

"That's what I'm trying to figure out."

"Why are you upside down, though?"

It only now hit Rainbow Dash that she was, in fact, upside down. She panicked, and began to try to move, and then realized something else. She was chained down, unable to move.

"What gives?!" Dash noticed Fluttershy looking towards Rainbow Dash's crotch area.

"What? What's wrong?"

"Look..." Fluttershy nodded at the place she was looking. Dash, looking up, noticed that she wasn't naked like she usually was, but was, in fact, wearing a diaper.

"Oh you've gotta be kidding me..." She said, as her cheeks turned a slight tint of pink.

Rainbow Dash thought back, trying to think of why in Equestria she would be in this room. She then took a look at her surroundings. She first turned to Fluttershy, and observed her. She noticed she was also wearing a diaper. She then turned to view the room. She was in a stone room, almost like a dungeon... Most likely a dungeon. Why else would they be shackled down?

Quite suddenly, a door opened, and both Dash's and Shy's heads snapped to the door

"Hello, little ponies."

"Celestia?" the two ponies said in unison. Celestia casually nodded.

"Why are we in here? What did we do?!"

"It is clear that you have comitted crime against Equestrian law, Rainbow Dash. You have stolen important goods from Canterlot."

"What?! That's crazy! What use would I have for 'Canterlot goods'?"

"Simple. Quite a few things that would catch your interest... As for you, Fluttershy, you have caused harm to the Royal Garden." Fluttershy cowered, not refusing to this at all, even if she knew this was wrong.

"For these crimes, you two shall go through a punishment... One that many seem to dislike."

"What, being tied up and forced to wear a diaper?"

"Yes. That, and then some."

With that, Celestia stepped out, and two guards stepped in. The door closed. The guards stood in front of the door, blocking it.

Dash was confused. "And then some?" She thought outloud.

A few moments past, before the sound of magic being used was heard, and a faint buzzing followed after it. Fluttershy shuffled, and crossed her legs. Rainbow Dash noticed something else on Fluttershy. A slight wire was sticking out from her diaper.

"Flutts... What is that..?"

At this point, Fluttershy stifled a moan, and turned to Dash with an embarassed look.

"I... I... think it's... mff... a vibrator..."

"A vibrator?"

"Y...Yeah... hnng..."

It was clear that Fluttershy was getting uncomfortable. The two ponies sat for a moment. After a while, Dash began struggling a bit more. Perhaps there was something she could move? She did a quick check on her body.
Her hind legs were stuck, clamped down. Those wouldn't be moving for a while. Her forelegs were a bit stuck, tied behind her back. Her wings were folded slightly uncomfortably underneath her forelegs. She then tried to lift her head, only to suddenly choke herself. Something was holding her neck in place.

"Great..."

Fluttershy looked at the guards, giving them her best 'Please help us' look. The guards had no response. It was at this moment that both of them heard a small gurgle.

"Oh boy..."

Dash blushed again, heavier this time.

"Dash... Do you need to go to-"

"Yes."

"Are we supposed to-"

"Probably..."

"O-Oh..."

The two were now noticably blushing, Dash being the more annoyed of the two.

Author's Note

Picture this chapter is based on - https://derpibooru.org/1117680