No, my biological mother and father were very loyal and loved each other. However, growing up, I've come to realize that my mom was probably a HUGE hippie back in the day. She was always so laid back, it wouldn't surprise me if she had a little pipe hidden somewhere in our old house. That's not to say she was a bad person, my mom was fucking amazing (may she rest in peace), she could pick up any non-percussion musical instrument and play it damn well within a week, and she worked from home so she'd always beat my video games before I did (despite my insistence not to spoil anything!) I know this doesn't exactly answer the question, but I guess I have a pretty wide concept of the word "cheated", i.e. my mom was probably an occasional smoker, and my dad served 7 years in the US Coast Guard, so he isn't exactly a huge fan of recreational substance use.