What would happen if you beat her to the punch in filing a D? I have just filed for D and right now I am noticing huge hesitation and feelings of losing control on my W's part.

Here is a hypothetical.. You say your W was raised by two ministers. Are they still around? Do they know of their daughters M problem? If they dont, then when you file a D, I would imagine your W would contact them to tell them you are divorcing her. They would probably get in touch with you to talk you out of it. You could explain your situation and they could help in an intervention.