My C thinks I should initiate a conversation saying, you're confusing me with your mixed signals, I need to know what you want. Well, that's a R conversation, and I can bet what the response will be: I want a divorce. I think my C thinks I'm making it harder on myself by wanting to save the M.
I don't see the point in that. I don't think your W has been giving you mixed signals at all. She has been clearly communicating that she wants a D, but she also seems to enjoy cake-eating and enjoying your support. My opinion is you should withdraw that so she becomes aware of what she will be losing after D. I've never seen cake-eating work on these boards. Never.