It's really sad but it could make things worse for him, revenge can be really toxic to the person seeking it. Best thing you can both do now is to distance your family forever from him.

I’d just let it go, he probably had the same growing up. 😞

It's not your place to meter out "punishment" on behalf of your husband. Your time and energy would be better spent in listening to him, helping him to heal from whatever was done to him - and supporting him with whatever he decides that he wants to do as far as dealing with that situation goes.

It's not worth making things worse for him and reaching the point where you are hated by your in-laws just for some petty revenge idea you have going on. In this case, two wrongs don't make a right.

I say you and your husband need to distance yourself from his father and the rest of the family you don't need the drama

I can understand your anger and wish for retribution . But that is a very nasty business and nothing good would come out of it . Don’t let the bastard win again by consuming your thoughts and filling you with such anger .

I think what the others have said is right. I get you are upset but your focus should be on getting you and your husband into a safer environment and concentrate on being there for your husband rather than punishing his family. Do not let his family's toxicity make you toxic.