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.
I seriously doubt you have kids. and if so, I feel really sorry for them.
Nietsche touches on this in explaining people's drive for power. Firstly they seek to stay alive, that is their initial instinct that is the highest priority up until they are able to have kids. Then having kids becomes a very high priority. This along with the drive for your children to live on in successful lives (touching on the initial drive to stay alive after understanding that you will eventually die, you live on through your children). It does not mean one has to dominate the other, just that every species has these drives. Otherwise after one generation that species would no longer exist.