My ex’s father cheated when my ex was 13-14 and moved out for 3 months. She cried a few times during our relationship when talking about it and how it was the worst 3 months of her life. Now logic and reason would say that she would never put her kids through the same thing she went through. Now logic and reason would say she saw her parents go through a difficult time and they were able to work through it stay married.
You have to throw logic and reason out the window.
