*ouch* man, I've been following your sitch for a while and I'm sorry to hear about what W has been telling her friend.
Quote: I'm dying to call her on "seeing" the OM and her lying in my face, but what would that do? I'd expose my snooping...but man, it would feel good...
It might feel good for a minute but I'd wager it would blow up in your face and be a setback for your R and DB'ing efforts. She likely thinks her e-mail is private - otherwise she wouldn't be saying the stuff she says in it. I think she'd see this snooping as a betrayal. What goals would confronting her accomplish - aside from the 'a-ha!caught you lying' factor? This is tough, you got some insight to her thinking right now. Maybe it would be best to take that and adjust how you're approaching things?