I have a girlfriend whose husband is badly addicted to porn and their marriage ended over it. I'm talking 8 hours a day everyday. But anyway, they divorced 5 years ago and she has completely detached and moved on. And they are friends. She did it for her kids. But she also has this mindset of "We spent 15 years together" and "why not be friends after all that time." He has remarried and she is okay with it all and seems to have let go. I think that's really neat. I don't think there is anything under the surface there either.