I'm probably a bad person for thinking this, but she was of consenting age. Excuse the pun, but she sort of "fucked" over her team with inappropriate adult behavior. So checking in is irrelevant from my perspective. And he was completely and utterly inappropriate with his actions as well. Neither is no longer here, nor should they be.
There is context from the university's side that we haven't heard yet. Assuming the meeting happened in front of the whole team, that to me is something the university might be uncomfortable about.
Again though, I come back to her being a consenting adult....AND he is no longer with the program. If it's not consenting, then it's rape. You don't see her going down that road. Everyone knows his resignation means that he wasn't going to be retained. It's not like there wasn't accountability from the University with both parties.