This takes place after "Pinkie Pride".

Pinkie and Cheese Sandwich have made the biggest party ever in Ponyville for Rainbow Dash. But after the party, Pinkie wants to get to know Cheese better, so she asks him to stay. He accepts, but Pinkie realizes Mr. and Mrs. Cake have to leave the next day, and she must babysit Pound and Pumpkin Cake. Luckily for her, Cheese wants to help, and everything goes great, until Pumpkin Cake accidentally shoots them with magic.

Contains diapers, diaper usage, shipping, babysitting, and cuteness.

A special thanks to SuperPinkBrony12 for the inspiration!