Zew, I echo SemperFi00's thought- do you really expect anything to be different should you reveal your W's lies to your mutual friend? I've talked to a couple of my WAW's close friends (who I'm friends with too) and come to realize that the more they try to talk W into working things out, the more she keeps to herself.
I recently sent an email to two of my W's closest friends who were like family to me. I expressed my disappointment that they didn't come to me about OM. The response I received was not at all what I would have expected. They essentially took a 'it's not my place to judge' stance.
