Rarity asks Fluttershy to help measure her rear for a new dress. Fluttershy's always happy to help out a friend, but as Rarity (and her generous flank) grows beyond measurement, Fluttershy can't help but wonder if she's in over her head.

[Macro] [Big Plushy Pony Butt]

Cover art drawn by Zajice, who makes beautiful ponies.