It's just... are there rules for this sort of thing? Maybe someone's written some etiquette book? How to talk to your ex-boyfriend from another universe after you just started dating his sister? And I feel like I'm supposed to know how to handle it cause hey, Batgirl, and hey, in an alternate universe right now, but... it's different.

[She pauses, giving herself a moment and eyeing the ice cream]

Do you think I should talk to him?