While the logical thing to do would have been to show them her costume (since it wasn't anything like the "skimpy, tight fitting" inappropriate outfit they were imagining) and offer to go with Dad dressed as the Hulk, I thought it was more realistic that she overreacted and spoke out of emotion rather than thinking it through - because teenage girls are like that. I found it a very real moment. Doing the logical, right thing would have been too Cosby-esque 80s sitcom (instant solve).