Cadance wonders what Flurry Heart is the alicorn princess OF.
Twilight Sparkle turns perfectionist (Ha! I'll bet you never saw THAT one coming!) and tries to figure out who's more inadequate, Flurry Heart or her mother?
This is what happens when you leave your "Cadance Is a Terrible Mom" competition folder (EDIT: link to main contest page) open the night after the deadline. People show up and TRY TO PUT THINGS in it.
(Story image: I cropped an MLP show screencap.)