As for the kids, he should have told them. This is a teaching moment. Not sharing life's mistakes only produces clueless adults. Humans were meant to LEARN and become WISER with age.
Obviously fiction. But. I have heard of real things like this that happened. You take a weak amoral woman, a predatory man approaches her and talks her into things that will curl your toes, and stuff she’d never do for her husband. That is probably most hurtful of all. And then she starts liking the excitement even though let’s face it, doing things that are in some cases just not natural, all on a wave of excitement. I have heard of this type of thing happening again and again. However, how rarely do you hear of a bunch of women talking a guy into rogering them all at the same time? Men are generally more rapacious and if young and having no moral bounds might engage in such behavior without drugs. But this stuff is beyond shameful.