The only thing that I have been able to use to get past my W's EA, and the horrible things I've read in their discussions, is my love for her and the honest belief that she is lost. Unfortunately she is no where near thinking that we could ever work at fixing our M. The important thing here, I guess, is that I do and believing she is lost/confused has helped.
I often feel like the person who is having the EA isn't my W - It's her mind, but her behavior and thoughts don't fit at all with the person I know. I don't know if she is faking being someone else to appear more appealing or fit some ideal that OM has.
Ironically, whenever she and OM have a fight and she comes closer to me for support, she behaves like my W again. It's difficult to comprehend, but sometimes I feel like there are two people living in one body.