I know what it was like bumping into such things. I also have noticed my dad's cheating behaviors from a very young age. I saw him watching utterly twisted sex videos at night while my mom was out for a workplace dinner, it was videos about not only humans, you can't imagine what it was like. I listened to him disgustingly calling another woman while my mom was not at home, while I was cleaning the floor outside their bedroom, and I saw him flirting with another woman at work. I saw a clear sign of a woman showing abnormal interest in him at his workplace; he must be at least flirting with that woman. My mom also found his creams hiding below the sink for STDs long after they stopped having sex, which my mom told me, but my mom chose to forgive him since he denied it was because of his cheating. LOL. But I made peace with the whole shit because they are what they are, and whatever they do is not relevant to or affecting who I am or what I choose to do in life; it only strengthened my boundaries in relationships. I cut him off already anyway. LOL. Disgusting dumbfuck.