Even though there was some build up the attitude shift seemed sudden. I'm guessing Fooly will act grateful to the dad for ensuring she has such great abs. Then they'll hit it off discussing how awesome she is.
The question is, what's the "dumber than the foreshadowing led you to think" twist gonna be?
Is he disappointed she never wanted follow the path of chubby like her mom? Will he disapprove of Fooly's love of chiseled abs?