Yeah but like you said he has to do something now! But even then there's the question of why she was ok with this in the first place? Why was she doing things for a stranger's money that she wouldn't do for her husband?I’d say there’s hope, for now. It’s still plausible that nothing more has happened YET.
OP, we’re trying to help you and we are looking out for your best interests. You need to take action immediately. Like now. You need to put an immediate stop to the modeling. Then investigate how far it actually went.
I mentioned in a red flags post that one of the red flags I missed was not looking at who her friends were. I think he's committed the same sin.