If he stood up with his wife in front of their gathered family, friends, and acquaintances - declared himself her monogamous life partner, let her bear his kids (?)/created a family with her. ..... And then cheated on her, he's not got integrity. Simple as that.
People (usually men) who act like that just exploit the fact that the woman has had his kids and is invested and tied, to get away with fucking outside their relationship; because they know most women never ever want to break up their kids home & "family" and will stay regardlesd of how much pain, disappointment, sadness, disallusionment, stress etc they suffer due to his actions. Having to go about their day and look after his kids with that on their minds.
It's no exaggeration to call it abuse, it is a type of abuse.
And most of the women arent the type to give him some back by having an affair themselves (not that that's the same as the first person breaking their vows, and betraying the relationship), and they know it. No suffering for them, just the wife.
Wise up about his good looks, "conversation" and outside work hobbies ... Who gives a fuck. He's a shit person with a pleasing looking facade and good chat who has some interests. So what.