Because she is cake eating. Your the provider, plus if she leaves that's a lot of church people that she has to tell. Which means she'll blame you if not already for her decisions. The good thing about your sitch is that her religious convictions are weighing on her mind. My W could give a damn less about God right now. Your religion is what's keeping her from making divorce demands right now. Your W clearly has doubts about her current life. Keep with the detaching.
Trust me, I am going through hell right now with mine. GAL and 180 like crazy. But I should have detached as well. The tough part was always being stuck in an in house separation. Now that she is gone I am quickly to a point where I am detaching. And my W has become even more wayward. I honestly wish I would heard TxHubby story a lot sooner. It would have helped my own sitch.