She was then quiet and I said to her "Did you miss me?" She said "We are going through a divorce!"
You pretty much walked right into that one. I think it does kind of push it back to square one....you've done all these little niceties, and then, with your question, basically made all of that seem like a ploy to win her back.
How long til she's over the anger? Who knows...she may get over it and still not want you back. What you need to accept is that she wants a divorce. That doesn't mean you have to accept it too, or like it, but you can't behave towards her as though she's just been kidding about her intentions. I'd cool it with the sweet gestures and especially with any kind of R talk. I would not say you missed her. I'd cut down on the conversations...keep them short and positive. If you can't resist expressing your "missing", then keep it to you missing the kids.
You cannot be lonely if you like the person you're alone with. Dr. Wayne Dyer