Q&A How Do I Feel Safe Knowing That the Worst Pain I Have Ever Felt Could Possibly Happen Again?

My wife of 20 years was caught cheating this August. It had been going on for 1 year. She is in sexual abuse counseling now due to a long history of sexual abuse that started when she was 3 years old. We are enrolled in the EMS Online program now. We both want the marriage to work. Tonight after a discussion we had about how it all happened she said the following when asked if she would ever cheat again. "I am not 100 % certain I won't do it again. It depends on the season of the marriage and if we are not doing well, there is a small possibility that I would cheat again. I don't want to, but my heart is not good and with my sexual history, I don't trust myself and my decisions". Although this was hard to hear, I do appreciate her efforts to ground zero honesty. My question, how do I feel safe knowing that the worst pain I have ever felt could possibly happen again? In addition, how do I invest in our future knowing she feels this way?