Most Helpful Girl
Divorce is never the answer regardless to the situation. First, it is best to determine why the cheating happened in the first place, then decide how to handle the person that cheated. Once you understand the situation fully is only then can you decide if divorce is on the table. Divorce should be your very last opinion if not at all. 9/10x cheating happens because there is not enough sex in the bedroom, lack of intimacy outside of the bedroom such hugging, cuddling, kissing, etc. Divorce affects everybody differently. It is not wise to just do whatever you want because of what you feel at the moment. It's easy to proclaim divorce. But think about the kids. Seriously. What's best for them is having able parents together. If you can explain to us what exactly happened that could have lead to her cheating, it would make things a lot easier to figure out. However, This should never be our opinion. This is between you, your wife and the kids. Listen to your children most of all. Their opinion matters.
Most Helpful Guy
Is he repentant about his cheating? Can you forgive him and work in trying to restore your marriage? Some people can do that but most people can't.
If restoring your marriage is the ultimate goal, then separation is preferable. It may be that he cheats even more during the separation and you ultimately choose divorce, but. . . if he wants to remain married, he will not cheat again. If he does cheat, you know that he is not serious about marriage and you should proceed with divorce.
Many people use a child as an excuse to not get divorced. If you stay married but don't love each other, irritate each other, argue, and are miserable in your lives, what example does that set for your child? Do you want him or her to grow up thinking that this is how people act in a normal marriage?