Inappropriate touching.....my baby girl...,another issue

Yesterday I posted about what my 14 year daughter is going through. Her “boyfriend” didn’t respect her boundaries and was touching her in ways he shouldn’t and she told him not to touch her. She’s getting counseling and he was punished. Now I’m stuck on what to do, if anything about telling her dad. He loves her and has always doted on her. We’ve always had her back as parents even though we’ve been separated the past five years.

She doesn’t want him to know about what happened because 1) she thinks it will cause him pain (she’s right about that) and 2) he might go nuts and kill the boy if he ever saw him (she might just be right about that too). My ex husband is also an alcoholic and I really don’t want to have to deal with his drunken crying phone calls again. But he’s her dad and he provides her insurance and he’s going to find out she’s seeing a counselor in Behavioral Health. Even if I don’t tell him, he’s definitely going to ask me what’s going on. How would you deal with this?

UPDATE: I spoke to her this evening and explained that since her dad covers her insurance, he may find out she’s going to Behavioral Health. I told her that if he asks me about it, I plan to tell him that she’s dealing with some things and wanted to speak with a counselor. I told her that’s all I would tell him and that it’s up to her to tell him more than that. She understood and seemed okay with it. So that’s good.