I'm gonna hazard a guess that it says something like

"It's not like I like you or anything"

そこまで言うんなら
金玉袋を広げて滑空して見せなさいよ

I'm gonna hazard a guess that it says something like

"I- If you are going to go that far,
then why don't you show me you spreading your testicles balls, and glide on them?"

Translations taken from above