You have been giving me great advice on my thread and I appreciate it very much. IMO maybe you should step back and try to look at your sitch like you look at mine. You are trying to "drive the devil" out of your wife, so to speak. Trying to win her back by telling her this isn't what God wants. You know and I know it's not what God wants. Your W knows it too but doesn't want to admit it right now. She is spending her time telling herself this is what He wants.
Maybe it's time to leave her alone and think that you are not going to be there for her. For the kids, yes, not for her.
You are a lot further along in this than I am, but I can see myself following along. It would tear me apart to seperate and I still love my W but how much longer can this go on? She still won't accept resonsibility for anything, it's all my fault. Your W is convinced this is what God wants and doesn't sound like she has owned up to anything, either.
Time to leave her alone and only communicate about the kids. Just my opinion. We keep reading the only thing that gets through is when they think they will lose us and they can't keep us just hanging on forever. I know I'm not fully detached either but I think it's time for both of us.