Pumpin up Dat Ass (Pixiv Fanbox)

Commission for PolygonBird Who wanted both a diaper picture and an inflation pic, so I split their commission into two parts. For this part, he wanted Flute's big perfect bird rump inflated to a such huge point, if Flo hadn't pulled the plug, who knows how big his ass would've gotten. But his butt is too good and round to risk. Can't fondle that rump if it's blown now can we? ^^