It's an awful situation, but try to make the most of it.
Exit the cult now and use the incident of your wife leaving you as your excuse. Make the change yourself. Your wife did it, so why can't you? Who knows... maybe after she experiences a bit of freedom from the cult and reenacts the youth that she has lost to it, she may reconsider and get back to you. You just never know. But the bigger issue is...now it's YOUR cue to leave.
Eden