"Huh, I suppose these bellows are just inclined to cause some extra expansion of those parts for whatever reason. Well, at least you'll be plenty comfortable once you are up to size~"
"Mmmphm..."

Vinyl's filling out quite nicely, I'm sure she'll be back to her usual scale with just a few more puffs from those bellows! Of course, that doesn't account for being able to do things like move under her own power, escape further puffs past that point, or indeed be anything but a rather naked balloon for the next while...