This is a really serious issue and I think its should be discussed with a rebbe or rebbetzin that you feel comfortable with and respect. Its true it may be embarrasing but people will end up finding out so its worth approaching someone.
I personally think that you shouldn’t criticize hom for anything he does and try to be as kind as you can he’s probably going through a very hard time. But at the same time keep your distance so you don’t get influenced.
Maybe suggest to your parents that they should discuss it with their rav, rebbe, rebbetzin