Deja Vu With Royalty

“Twilight?!” Luna exclaimed as she darted into the room, “I came as soon as I heard! What’s...”

Being called into the throne room with an urgent message from Twilight was certainly something that would put Luna in a bit of a panic, something that certainly merited a bunch of questions from the blue alicorn. However, when she arrived in the throne room and saw her sister crying on the floor with a heavily used diaper around her waist, a lot of Luna’s questions were answered. And of course, such a sight created a dozen more questions that needed answers.

Twilight stood near the door shaken up with worry when Luna arrived. The foul smell of burnt magic charged the air with an off putting scent as the unicorn was lost for words.

“Twilight...” Luna started again, much calmer this time around. “What exactly happened here?”

“Sh-she was charging at me,” Twilight answered with a rattled voice, “I-I panicked and i-it just sort of happened in defense! I didn’t mean to-”

Luna was quick to console the panicked unicorn. “It’s quite alright, young Twilight. It was an accident.”

“I-I was just scared, you know?” Twilight’s voice quivered, “I-I wasn’t trying to-”

“You’ve done nothing that cannot be undone, Twilight. Accidents happen,” Luna handled the problem calmly, occasionally glancing down at her regressed sister who was starting to stink up the place with her messy diaper. “I admit the result isn’t...typical, but a quick defensive spell is far from permanent.” She used her magic to levitate the crying white alicorn into the air and gently rocked her in place. That seemed to calm Celestia down quite a bit as her loud bawling slowly devolved into quiet sniffles. “My sister will be back to her old self in a few days.”

“A-and...until then?”

“Until then...well...” Luna paused, looking at her regressed sister who now occupied herself with chewing on her hoof, “how good are you at changing diapers?”

“Well...I guess I have some experience,” Twilight answered, wiping the tears out of her eyes.

“Oh good, because...” Luna’s words trailed off as she caught another whiff of Celestia’s diapers. She felt her face turn green as she plugged her nose with a hoof. “Because she could certainly use one...”

“I’m so sorry, Celestia,” Twilight apologized to the regressed pony, “I-I’ll make it up to you. I’ll keep an eye on you every day until all of this rights itself!”

Celestia giggled and kicked her hooves a little bit in the air. In a strange way, Twilight felt like she was accepting the apology. A few days of this. Then everything would be back to normal.