Tell her to strip down to her underwear

" ... You are only allowed to wear your bra and panties at school!" Now she has to admit, that she was messing with me. You look at her and notice, that she already removed her white sneakers and socks.

"Wait, you are actually doing it?" She snaps back at you: "Of course I am, you stupid idiot! I can't control it, only you can!" You notice a tear at her cheek, while she takes off her grey shirt alongside her purple skirt, to reveal a matching white set of bra and panties.

"Happy, asshole?", she asks angry. There is no way, she would go this far for a joke. "Ok, wait! I'm convinced, that my powers are real. So I wanted to tell you: ..."