Destiny Diapered?
 

It was the average normal, everyday usual day in the bustling city of Canterlot. The sun was just about to peak up over the horizon as one specific pony began to stir. It was one, Princess Celestia of Equestria, who was fluttering her eyes as she instinctively began to pour power into her horn in order to enable the suns passing. Though as she did, she began to feel, odd. Her bed, felt different. There was a lingering scent in the air, she felt moist? Something was wrong here, and she knew it the moment her eyes opened.

Stretching her hooves and throwing the blanket off of herself, she was treated with the site of a diaper clinging to her rump, and a heavily wet one no less, easy to see by the heavy yellow staining. Which made the lingering scent make all the more sense as she finally recognized it as pee. Sitting up in bed caused her to gaze about her room, it too had changed somewhat, looking a bit less, done up? It looked far messier for one, and it was easy to notice the shelf that hadn't been there before that was also stocked with rather large foalish supplies. Standing up on her hooves next to her bed, she wondered what in the world was going on.

As the Solar Princess gazed about her transformed bedroom, the door leading within slowly opened. A midnight blue mare slowly trotted in. It was her younger sister, Princess Luna of Equestria. A heavily soaked and soiled jet black diaper with yellow moon and star prints swung from her hips as she entered the room. Luna yawned, rubbing her eyes, "Morning sis." She smiled, as a pacifier hung from a string around her neck.

As Celestia saw her younger sister trot into the room, dressed in a similar sort of garb that she was now, made her think that this was some sort of elaborate trick by her sister. Though aside from the rather distasteful looking diaper Luna was wearing, and the pungent odor her sister brought into the room, Celestia noticed some type of ring on Luna's horn, a simple thing, but there it was all the same. "Luna, quite, hilarious, though I must say your taste in humor is quite, odd these days. But I would feel so much better if you just stopped this all now." She said.

The lunar regent cocked her head, "Uh sis, are you feeling alright? I didn't play any sort of prank on you." Luna trotted over, and levitated out a changing mat, as well as changing supplies. She patted the rubber mat, "Now, lay down on this so I can change you, then you can change me." She smiled.

All sorts of thoughts were swimming around in Celestia's head. She could hardly think straight, and then suddenly Luna invited her to be changed? Celestia felt rather stiff as she moved towards her sister. "Luna, you can change me out of this, diaper and put things back the way they were. And then. Uh." Celestia said, blanking on something, turn it back to what, normal, but wasn't this normal? No! No, but, what was normal?

"Alright." Luna smiled warmly. She untaped the diaper, letting the slightly chilly breeze wash over Celestia's damp nethers. Grabbing a few wipes, she began to wipe the urine from her sister's marehood. Once the skin was dry, she applied powder and oil, then taped on a bulky white diaper with swirly suns. "Done!" She patted the front, the in, moving her sister off the mat, laid down with a muffled squish. She suckled on her pacifier.

It all happened so fast, one moment Celestia was simply laying there with a wet diaper on. The next Luna was rubbing a wipe across her rear and then another diaper?! Before Celestia could even form the protest in her mind, Luna already had her in a new diaper. She would not stand for such behavior, but as she got up, something in her mind ticked, she had to change Luna, she always changed Luna now. So, without even thinking too much about it, Celestia ripped the tabs off the diaper and opened it up to reveal the mess inside, causing Celestia to scrunch her face up and put a hoof to her nose. "Oh my goodness Luna! What ever did you do inside this.." She said in exasperation.

Luna snickered, her tail swaying from side to side. "What do you think? A lot of moon cake induced horse apples." She smiled. She lifted her hind legs so Celestia would have an easier time wiping her plot. "So, how bad does it looked?"

Celestia grimaced as she said. "Bad enough for me not to describe." As she took the diaper in hoof and used to get most of the foul mess stuck to her sisters rear end, the diaper having taken on a somewhat brown and green discoloration, only visible on the blue, or previously blue rather, parts of the diaper. Then she got down to the task of getting her clean, which was not easy in the slightest with what she had to deal with here.

"Ah, that makes sense." Luna shrugged, humming as she was cleaned. "Oh, almost forgot." She hooved a scroll over to her sister, "Here's your schedule sis." She smiled warmly.mher rump was absolutely caked in manure.