I think my gf’s into ball busting and idk how to confront her…

Okay so I recently started dating this girl. It’s been a month and she has tried to scare me to grab or kick my balls. Also when we are intense, she brings this up once. But she is shy and has never actually reached for it. I am lowkey into ball busting too. I just want to make sure if she actually likes it or not. Can anyone suggest me a playful way to make her try to kick or any online couple games which could lead such task.
I don’t want to sound obvious abt this kink and just want to make it look natural.
I am open to ideas, pls help me !