Yes, you are tired and I know from my experiences that is not the time to try to make major decisions. But, I think the emotional and physical strain is taking a toll on you. You need a break. Perhaps you should consider what I suggested last time and tell your wife that you need to back away. She doesn't have to escort your son to the car when you pick him up or talk to you on the phone. She may leave a phone message, if necessary or email, etc. if she needs to contact you. There are ways to get around those conversations, but still need to have a way of contact for any emergency situation.....and just important things since the son is involved.
You would know how to approach this better than anyone else. You also know how she may react to it. Who knows, it may just make her sit up and take notice. I think if she did not see or talk to you....it would be good on both sides. It's hard to "go dark" when there is a child involved, but you certainly can work around seeing and talking to her. You may even have someone to act as a "go between" if you have to. But, not the son....he's already caught in the middle.
About MIL's.....yeah, mine was the MIL from hell! Of course, I am a wonderful MIL....just ask my son's wife! (lol) Seriously, she tells everyone that. But, I am very, very blessed to have her as my daughter-in-love (as I call her). I learned a lot from the MIL I had....by that I mean I learned what I did NOT want to be when it came my turn to be a MIL. So, I've tried real hard. I think the reason most people can get along with the FIL and why he gets away with being the "good guy" (in most cases....not all) is that women (mothers) get too involved with their children's personal lives after the kids grow up. Moms don't want to cut the apron strings and leave their kids to make their own decisions and mistakes. It's difficult, I know. But, I have tried extremely hard not to intrude into my grown children's business simply b/c of my experience with my MIL. I also learned from my folks b/c they were the type that did not tell me and my H how to live our lives and run our business. It's a good thing b/c we would have gone crazy and probably D if both sides of the family were telling us what to do and not do.
My heart goes out to you where the MIL is concerned.......I truly mean that. It can be hell on earth. It is just as bad when they are nothing but big phonies, too. Mothers have a big impact on our lives. Apparently, your dad did a great job raising his family. Speaking of my DIL, she came from a not-so-good home life. I really don't know how she came out with deep emotional scars.....and there may be some that I don't know about. However, in the past ten years that she has been my DIL, she has been so precious. So, people CAN overcome bad homes, bad parenting skills and divorces, etc. I think the death of a parent when you are a child is probably the worst of all.
How old were you when your dad married the young lady? Do you have a good relationship with your dad now?
Well, at least if you back away from your W.......that should include her mother as well (lol). That has got to help some!
Got to get back to work. Talk to ya later.
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!