In theory, adultery does reflect on your moral fitness, which is a factor a court can consider in making its child custody determination. In practice, however, I am not aware of any case in the last decade in which adultery was cited as the reason apparent was denied child custody or had a custody award curtailed. Until now, it used to be that in Utah adultery didn't really have much impact on the alimony award either. But as of 2013, the law in Utah now is as follows: See Utah Code Section 30-3-5(8): (b) The court may consider the fault of the parties in determining whether to award alimony and the terms thereof. (c) "Fault" means any of the following wrongful conduct during the marriage that substantially contributed to the breakup of the marriage relationship: (i) engaging in sexual relations with a person other than the party's spouse; (d) The court may, when fault is at issue, close the proceedings and seal the court records.
Answered on Sep 13th, 2013 at 2:43 PM