Interesting story and turn of events in your sitch.
Sounds like you've got the right approach to it. We all wish our S's would have that kind of revelation and the ability to tell us about it. But when you think about it, that's a scary situation to be in. To have her leave you and marry the OM so quickly, and then turn around just as fast and want to come back - it's really not sane.
Definitely wait to see if she'll follow through on her words with actions. Will be following your sitch...
And to Arwen: I like what you said about the drug addict analogy. It was just what I needed to hear to stop me from spinning.