More room… part 3: Elegant curves, act eight - by Defenceless
 
‘I was most certain that the new treats that Twilight made would have an inpact on Raritys ever growing size. However, they worked almost a tad too well. While Twilight and even her little dragon had layed on some new pudge, Rarity was expanding quite rapidly. Not even dresses that she made fitted her, once she finished them.  
I was starting to ponder.. maybe it was time, that Rarity visited Rainbow Dash and Applejack…. there we could perhaps see, just how quick this marshmallow would fluff up.’