I was playing catch up with your thread and have to say it sounds like there is a lot of good stuff with your interaction with your wife.
I could be wrong but what reason would your wife have to tell you that her friend says she may still be in love with you if she didn't think it as well. Plus stating that she may be in an MLC sounds like she probably did hear this from her friend but is using the "my friend" thing to get feelings out that was building up inside of her.
Add to the fact that she is taking you into her "confidence" with several different sensitive topics is screaming emotional closeness to you as a desire. I know I am not supposed to make firm statements and preface everything with "possibly" or "could be" but some of it has to be coming from something deep within her about your R with her.
It sounds as though she is testing the waters with you to see if the changes are real and hoping they are. Discussing faith and asking questions sounds like God has a hold on her. I am not surprised about that either. An article I read recently in Yahoo dating (it was on the front page of yahoo so dont anyone think I was looking, lol) that a majority of women desire men who would lead them and their family spiritually. I don't know if that is true but I believe it was with my wife (and I screwed that up as bad as you can).
Keep making these changes about you permanent. No matter what happens, and I would place my money on you two, you will be a better man that you were before (and it doesnt sound like you were a slouch before).
Me:56, W:51 D:26,S:24,S:22 Married:18 Bomb 9/27/06 Separated 11/27/06 Divorced 10/6/08 Leaving it up to God