I think a lot of us know the confusing behavior of a formerly distant spouse now trying to make nice. Yes, it would be a weight off of her shoulders if you just let her off of the hook. Besides, she's got what she wanted. This behavior was so confusing to me because I wanted to believe that it meant way more than it did.
What I now know is that if she wanted the sitch to change she would do it. Anyone can be nice and cordial. The only you could ever really be sure of her intentions was for her to tell you. When it comes to reconciliation there are no grey areas. Everything has to be layed out on the table and she would take the initiative to do just that.