Thank you for posting. It is, in many ways, similar to what my wife and I went through. Like you, my spouse asked to come home "out of the blue". And it truly was like that...I was convinced she was not coming back, and she told me as much only 12 hours previous! ("believe none of what they say").
Right now, we are coming out the other side of the "ambiguous" stage you mentioned. You are correct in that you just have to be patient and let things evolve naturally.
My wife is not wearing her ring either, and I struggle with whether to mention it to her or ask her about it. However, after reading your post, I have decided to let it go. I continue to wear mine for my own reasons, and hopefully she will put hers on when the time is right.
All other parts of the R are going very well, and we are totally on track to be awesome for each other for the future.
Thanks again for reinforcing what I already knew!
Me: 54 Her: 50 and sexy as hell M: 32yrs T: 34yrs Bomb: Sept 26-07 "lost our emotional connection" Bomb 2: Dec 25-07 she's "not feeling desire" She asked if she could come home Apr 26-08! Everything's GREAT!