RH..I'm mad about your MIL. I don't expect them to take sides..but to encourage D!!! Does she realise what is at stake???? My MIL had two affairs and her H still took her back. He has been a loyal and loving H who takes very good care of her. I don't think she ever realised what she has (and still doesn't). I think my H takes after her. They have always been very close. She is a tough case and doesn't think her son can do any wrong. Its only ever been about what makes her son happy...not ever about taking responsibility. I don't think she ever regretted her affairs. She always did what she wanted.
My parents don't even know what's happening in my R. They are aging and have their own health problems. They would be absolutely devastated if they knew. I refuse to worry them about it and couldn't break their hearts like that. There has never been a divorce in my immediate family.
Please excuse my venting here and its only my my side of the story. Geeze RH I am speechless about what you said.