It appears to me that your wife does not feel that she's married to you anymore. For her to say that she could be in another relationship by then, means that she's definitely looking, has probably found someone and is keeping you on a string till it's concrete. I could be wrong, but that's my gut feeling.
My XWW's friend is going through problems with an abusive alcoholic husband, and she said she wanted to save her M 3/10. I say, if you ever get to a point, where you don't want to save your marriage 10/10, then just give up.
She wants to be set free, but you're most likely the ball and chain keeping her back. Painful, indeed.
Just cos things are going right, doesn't mean that they were always wrong.
