My H had 3 ONS's with 3 different women, and a 4th woman he had 4 "ONS's" with over an 18 month period (like, no dating, no relationship, just a booty call every few months). In my eyes, I'm disgusted that my H could treat another human being like that, use them up and throw them away like trash. That's NOT the man I married. But I was able to forgive him for that. And I know others here have forgiven their spouses for the same type of thing, and many have forgiven their spouses for different things.
"People who live in a glass house have to answer the door" -Karl Pilkington
Whether ONS, LTA, EA - they are all the same. They cause you unimaginable pain.
Maybe one day I can forgive...
You made a fool out of me and she made a fool out of you