Rob... I too was completely blindsided by my ex-wife. Betrayed by someone who I loved and trusted completely. It drove me into deep shock and a depression that I only just survived. But I still had many great women in my life... my mum, my grandmothers (both of whom had passed away by then) and my sisters to name just a few. I had a very strong sense that what my ex did was not typical of women so no...I didn't lose my ability to trust.
When people are betrayed like we have been there are some things that will be taken from us. Our marriage, our house, our kids, our money, our 'stuff', the future we imagined we would have. Losing some things is unavoidable. But there's other things that we don't HAVE to lose unless we choose to give them up. Trust is one. Faith is another. The ability to love. The desire to be loved.
I often ask people this question... How much are you going to let them take?? How much power are you going to let them have over your life?? Haven't they taken enough already... are you really going to let them take it all??
Don't let her take it all Rob.