Story Summary:
Rarity's newest clothing line, the "Yummy Tummy" is designed so that ponies of any weight can wear them and still look fabulous. However, she must test this "one size fits all" theory. She visits Twilight and borrows a spell- one that will let her test the dress's size capacity. It works fine at first, but it turns out Rarity forgot to ask for the counterspell. Soon, Rarity has an ENORMOUS problem.

This Story Contains:
Anthropomorphic ponies
Extreme body inflation by magical means
Breast and "plot" expansion
Belly growth
NO POPPING (sorry. I just REALLY don't approve of that :/)

COVER ART DISCLAIMERS:
Credit for the cover art goes to the Deviantart user SLB94. The image is called "Raribadge", and is one of their many amazing MLP vectors. Yes, I do have permission to use the art so long as they are given the credit.