Many people would consider one of the biggest betrayals in any marriage to be infidelity. Adultery often destroys not only the marriage, but the family as well, and one party often files for divorce. Most divorces in Utah are considered to be due to irreconcilable differences, but the fact that one spouse broke the couple's wedding vows can still affect the outcome of the proceedings.
You may list infidelity as a grounds for divorce when you file. However, doing so puts a burden on you to prove that your spouse cheated on you in order to obtain a divorce. This is why many attorneys will recommend listing irreconcilable differences as the cause for your divorce. However, that does not mean that the fact that your spouse committed adultery will not play a factor in your divorce.