So Dazed I suspect she's now thinking and starting to notice the grass isn't greener, only notice or wonder if she's noticing.
It sounds like your interactions actually have been positive. I suspect they have given her a chance to look at you without all the pain and hurt. If that is the case it's a good thing. But it's extremely important for you right now to have the patience of Job. Now more than ever it's important for you to have a positive attitude, outlook, demeanor etc in every interaction with her or anyone she associates with. This gives here a chance to see the wonderful guy she married and deep in her heart wants in her life.
So keep up the good work!
BTW, I haven't heard from my wife in two days and honestly it's killing me. We are in a similar position as you but without the divorce papers. Working at being friends again and we both have just finished reading The 5 Love Languages. But we are also trying to iron out a separation agreement too. (Don't ask) So I am trying extra hard to make sure every interaction is extremely positive and helps plant the seeds again.
If we really want to love, we must learn how to forgive. - Mother Theresa