Wow, thanks so much for all the info. Today is the first day that I have truly detached as you recommended. I don't think the W cared much for it. Went to a group session and a church and she sent me a text asking what "meeting" I had. I just told her it was something I was doing to improve me. Was that the right thing to do?
Yes - she probably thinks that your change is suspicious since it is a new behavior. I would not worry about it. She already has had an affair and may suspect one of you.
I suggest you continue to be a great DAD, as this is very important.
No one thing you do is going to turn this around, it takes lots of hard work.