Michigan is a no-fault divorce state, which means the court really doesn’t get too involved in determining who is at fault for the divorce. With extramarital affairs, the court feels there are two sides to every story and they don’t know the whole history behind the relationship, so they’ll only want to know if that alone is responsible for the breakdown of the marriage and won’t get into it otherwise.
In some cases, it can make a big difference when it comes to settlement, because it charges one side of the marriage emotionally and often makes their attitude more difficult to deal with. These types of situations can have a big effect on divorce cases, but it has little to do with the judge; it’s more an issue between the parties.