So what do you suggest he do Lotus? He has tried the passive ways and she just keeps disrespecting him. You know as well as I do what's going on.
The example I gave him describes how he feels when she does this behavior. If she continues to do it, then he can decide to go to all night bars or have an A or whatever he wants, but why should she get to make his life miserable while she plays around?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!