Caught cheating 2nd time😒

Why do men/woman cheat? just that is bad enough... but when there's children (any age) involved it feels like crap. If you are unhappy might as well end it even though it would be a heartbreak. It's better than leaving the rest of the family feeling like a failure, to question themselves on what they did wrong.

This goes out to my father, the man who taught me to be honest, faithful, loyal, truthful, humble & etc.. Before i knew he was a cheater i onced bumped into him while driving to my college. I waved at him and he saw me but ignored me. I saw someone next to him in his truck. I thought to myself "could he really?.. No thats not dad...he wouldn't do that" we found him for the 2nd time cheating.. What did we do wrong? Were you really that unhappy?