IB
Your W is full of frustration and anger. A lot of it is justified. She hasn't had a whole lot of say in some of the most important events in her life and this has wounded her deeply. Get counsoling from a very good MC. Steve Harley is one of the best in my opinion.,
Reading His Needs/Her Needs could be helpful to you. You want to make no wrong moves if you can help it.
you should try to disarm that anger by not trying to convince her of anthing but rather agree with her reasons for feeling hurt. She sought the OM for and escape from her frustration and pain. Of course this is devastating to you. You would have to be a zombie not to feel the heartache. So don't be too hard on yourself. But pray for forgiveness and pray for the kindness to forgive your W. What she did seems to be an attempt to lessen the pain and not to hurt you.
I talked my 1st W into an abortion because we were having M problems. It changed her. I didn't know that a woman bonds with the baby long before the actual birth. To me it was just so much tissue that would eventually become a baby if allowed to grow. But to her, it was part of her soul. What an [censored] I was. We could have fixed it over time but I was too hurt when she pulled away and I was controlled my emotions with little or no consideration for hers.
Let your W vent and then agree with her even if you think you had good reasons for what you did. Stop defending youself. She won't fight with you once you have thrown down your weapon.
"I'm sorry, you were right. I thought I was helping but now I see that I didn't. You were right"
"Yes, what I did was selfish, I let my emotions get the better of me and acted badly. Please forgive me, I was wrong."
"I realize now the how hard it was for you feeling so alone, that you turned to XX for comfort. I want to make that up to you, take care of your hurt be there for you."
Others may disagree or have other suggestions, but these are mine. I didn't do everything right in this marriage and drove my W away. Now I am hoping to get the chance to love her the way she needed to be.