I know that it is nothing we do or say that makes them finally quit.
As to whether divorce and no more personal/financial contact makes them feel we are slipping away? I have no idea - I think that while they are still in throes of the crisis, they couldn't care less. After eight plus years of this, this is what I see.
I will always have contact with the father of my children because that is who he is.
MLC is something that was engendered in them before we met them. It has nothing to do with our marriage.
I will stand until death do us part, however, I cannot claim to being sure he will come back home. In my mind, these are two different things. I will do my part in our marriage and what he does, is what he does.
That is why we need to take responsibility for ourselves and our children, if they so need us. My life is my responsibility.
His life and decisions are his.
I don't pass judgement on his behavior, that is not my role. My behavior is my concern, God is my judge.