.. and emerge stronger or perhaps wiser.
A good friend of mine was asked by his sister to follow her partner from work because she suspected him of having an affair.
He was very reluctant to do it and told her he did not want to as it felt wrong for lots of reasons but she was very upset and insistent, so he agreed to do it.
He waited in his car on the day she requested and watched the guy come out of work, get into his car and drive off. He followed him to a housing estate where he parked up and went to a house and knocked on the door.
A woman in a nightie or perhaps a negligee answered the door, They went back inside and then he saw them upstairs in a bedroom and close the curtains.
He waited and about an our later the guy came out and drove off.
He told his sister. She already knew really and thanked him for his help.
About ten years later they got married. They seem to be really happy, and obviously worked through whatever it was that was wrong.
Perhaps she considered her options and decided to settle, or perhaps she confronted him, my friend never found out and he never asked.
I had a feeling she stayed with him because they were older and maybe she thought she would never meet anyone else. I expect this must happen a lot. To move forward you have to forgive and try to forget I suppose.