EdenOne,
I so feel for you on this. You're getting some great advice here on this thread - decide what works for your marriage and what you're comfortable with, even if the situation itself is probably your worst nightmare. At least you could see this coming, so that shows how well you know her - trust THAT knowledge. My heart aches for you, and I can see see how rational you've been throughout it all. I hope that this phase of your lives together will be short-lived, for both of your sakes.
I'm completely out and done (inactive and never going back, don't believe it anymore), and my husband is inactive, but mentally still a JW. He says he's never going back, but he's got older faithful JW parents. I can totally see this happening to him when his parents die. He still believes in the resurrection, still believe it's "the truth", but of course, hasn't done any investigating on his own. He just quit everything and he's glad to not be on the JW treadmill again. He's also not very social and doesn't like people in general (probably because they were JWs), so getting him to learn how to make a real friend and how much work it is (from his point of view) is pretty tough. I can see this happening to him too, once his parents die. I'm steeling myself for this potential turn of events. I don't know how I will handle this, but it's good to be prepared.
Keep visiting here and drawing strength and empathy from wherever you find it. Of course, keep us posted.
Mac n Cheese