Cinders that was a lovely, generous reply and one I would have expected from you.
I too wished to contine being part of my inlaw family But for my own sanity I had to separate. I could not be a part of the hypocrisy.
I soon realised I had to be the scapegoat for what her son had done. He always was the "golden child"
She continues to say how much her son loves his children and talks of contact they have --pure fantasy. One meeting after 8 yrs to see his d and g/son.Nothing for his sons.
I think I would exclude any OW from my home until after a D-NO I know I would. I would do all in my power to bring about a reconcilliation and I would go out of my way to maintain contact with my DIL or SIL during and after the crisis.

I hope you are spared from such heartache because it hurt me as much if not more than what my x did as they were not going through a MLC and had no excuse for the way they treated us all.
Unfortunately I am a crab and I retreat to my shell at times like those and it would take a huge effort to make me available for more pain. No contact is best for me but I hope my children will eventually have some contact. This as the years roll by looks unlikely, but never say never.
Sorry to go on -can you say a touchy subject.
God Bless you as I know he will.