Keep in mind the kids come first. Everyone else comes second.
That means that making the kids suffer because the mother slept around is the wrong answer.
No. I come first. Then my kids - (...)
I seriously doubt you have kids. and if so, I feel really sorry for them.
I don't see how somebody who didn't put themselves and their own development (economical, emotional, intellectual, spiritual) first would raise children. Such a person would have nothing to offer to their offspring and just propagate problems through generations instead of making improvements.