Celestia had begun lowering the sun when her sister Luna had appeared behind her to raise the moon.
"I shall take over sister." Luna stated.
"thank you Luna, today was longer than usual." Celestia sighed.
"if u need I can raise the sun sister."
"maybe, wake me up when the time comes and we will see"
Celestia heard her sister squeal with delight as she walked to her room. She walked in and closed her door and took a look around her room.
"looks like nopony was in here but me, good." Celestia smiled at that word. she hadn't told anyone about her secret not even her sister. She walked to her closet and pulled out a chest with her magic, then she pulled a key from her drawer and unlocked the chest to reveal its contents. Diapers each one with a sun on the front and back with pink tapes. She pulled out a diaper and some foal powder from her drawer. she laid on her back and used her magic to powder herself then tape up her diaper. Celestia smiled as the poofy padding hugged her flank. She also enjoyed the slight crinkling sound when she moved.
"hehehehe." Celestia giggled.
Celestia couldn't remember the first time she tried wearing diapers but she knew they made her feel safe and secure, and they were comfy too.
"Yawn." I suppose I should get some sleep. Once her head hit her pillow she was out like a light.

Celestia woke up at 3:00 AM. She yawned and smiled. But her smile disappeared when a strong smell of manure hit her muzzle. "Oh my goodness!", Celestia exclaimed, "What is that horrible smell?". But then, she felt something squish against her flank. "Oh no", Celestia said gloomy, "Did I mess myself?". Celestia got up and looked back at her diaper. It was heavy and bulgy. This frightened her to the core as she then began to wet herself, making her diaper even heavier.

When Celestia finished wetting herself, she was still paralyzed with fear. She couldn't move. Right when she calmed down, Luna came into her room. "Sis", Luna said, "I smelt something horrible in the hall and-". She stopped when she saw her big sister in a diaper. She was shocked. Plus, she was even more shocked when she saw that it was wet and messy. Luna didn't laugh because she was very loyal to her big sister. Celestia looked at Luna with a look of embarrassment. She started to cry. Luna went over to Celestia and put her wing around her to calm her down.

"There, there", Luna said, "Want me to change you?" Celestia wanted to say no, but she really needed a good diaper change. "Yes", Celestia then said, " Please change my diapee." When Celestia said "diapee", Luna felt warm inside. "Ok", Luna said. Celestia layed on her back while Luna got the supplies. Luna untaped Celestia's messy diaper. The smell was even stronger. "Whew!", Luna said, "All that cake really did a number on you", Luna said as she removed Celestia's diaper. She then took some foal wipes and cleaned Celestia's flank. She then put some rash cream and foal powder on Celestia's privates and then put a fresh diaper on Celestia. "There", Luna said, "Is that better?" Celestia giggled. "Much better

"Cans we pway?" Celestia asked, giving Luna a playful face. Luna smiled and patted her sister's head.

"Sure." Luna smiled.

Celestia levitated some baby toys out of the chest. She soon saw a ursa minor bear, and nuzzled it cutely. Luna awe'd at her sister's foal like behavior. Luna smiled and thought of something.

"Wait here for a sec," Luna asked as she left the room. Luna came back... To Be Continued