I will be careful giving advice here. but that quote above is one to pay attention to. I am going through something similar but after I had my own EA.
As I've been told transparency is key to getting the trust back. i know it will be for me. IF she is trying to love you and make the marriage work and you do too...see it for the gift it is and stop obsessing. That would be different if it was still going on with OM.
I can only say to focus on loving her and improving the things that are wrong. You CAN get through this but you need to reprogram. TRUST ME..if you push her away and she wants to leave you will realize instantly what a huge mistake you've made IF you love her. I am living this right now.. Don't go down this road.
Just my $.02. Maybe there is something I said that can help.
Jeff
***Getting up every day and learning to breathe in a new me. For me and my children***
Me: 43 W: 38 SD-15 S(s): 12,9,7 Separated-2/14/2009 My sitch