What else could I have done?

[antlers]

Barb, I did respond to that last text from my exMIL. She supported her daughter in trying to take my kids away from me. And while I was trying to save my marriage and my family, my exW was bangin' my sons basketball coach. And her deceit and lies were placing ALL of the blame on just me. And she was happy for ALL of the blame to be placed on me. Here's my response...
"Well, last month she texted me telling me many hurtful things she experienced with me. Her hurt is still there regardless. And I feel bad for it. She now says she "hates" me to this day. Are these things evidence of "she has moved on"? And for the previous 6 months we were pleasantly and jokingly communicating with each other, until she again got involved with Steve. Then it stopped. She has also revised our marital history somewhat - she now cannot remember any good things about our 17 years of marriage. Remember, she chose me to be the father of her children. There must have been some good for her to choose me for this most important role. There is a lot of truth in her description of our relationship. (Plus she also started another affair that I believe in my heart also helped her make the decision to give up and leave). And she was more than willing to let me take ALL of the blame for our demise, which I did for a long time. It hurt me that you supported her decision to try and take my kids away. That wasn't very Christ-like. And she knows that I love her unconditionally even if she doesn't want to be with me anymore. That's the best way to make it clear that I'm sincere. If I had it to do over again, I’d choose her. Again. 
If I could go back to any point in my life with the experience and knowledge I have now, I'd go back and prove my love to her every day, from the very first time she professed her love for me."
I do appreciate your post Barb. Thank you. It is food for thought.