OK... you will have to talk to your MIL and find out where she stands on all of this then...
I would PREFER to see her tell her son he's not welcome in HER HOME or HER RENTAL at ALL until he's STOPPED the nonsense... SHUT HIM OUT completley (yes, protection phase for her too)
THAT would be a HUGE BLOW to the affair right there.. I just don't know if your MIL has the cajones to take that kind of stand.. its what's NEEDED of coruse, but there are a lot of parents who just don't have what it takes to confront an addict properly... parents are notorious enablers...
