I'm so sorry you had to find that out. Honestly, our WAWs seem very similar right now. In fact, after our "friendly" weekend I've decided I want no more contact with her because I know OM is still in the picture. I was afraid of what your W was doing and it turns out to be true. I haven't said this in a while (even to myself) "believe none of what you hear". Its so true that it scares me.
I know I would confront her, although I don't think its a wise thing to do. I've confronted my W everytime something comes up during this period and looking back none of it helped. And recently both of us have joked about "bf or gf". She knows I've been talking to OW and she knows I reverse cheated (just made that up) so I'm know saint in this either.
You are right about the doormat thing. I think you need to confront her but in a rational frame of mind. Tell her that you know what she's doing and you can't be "friends" to her while this is going on. She is getting her cake and eating it to.
Again I'm sorry you found that out. I know it was accidental but I now try harder to avoid finding anything out. I didn't want to reach under her couch the other day when D dropped something, just in case I found something.
Take a day or two to cool off before you react to her.
M 35 W 28 D 4
Bomb 4/28/08 Found out about PA 05/14/08 Separated 5/25/08 (not legally)