When Sweetie overhears a weird noise coming from Rarity's room, she decides to investigate. What she finds will change her perception of Rarity forever. Or not. And then her secret comes out. Which causes a cascade effects of secrets, each more shocking than the last.

A short little story I wrote because I was bored. This is what happens when I decide to put my own little spin on the whole, "Rarity is a marshmallow" thing.