I am still currently married and my wife had an affair. she moved back home to Kentucky is there anyway I can get my kids back to nevada

Much depends on timing.  If the children and both parents were living in Nevada for at least 6 months, and they have been gone for less than 6 months, Nevada remains the "Home State" and therefore you could file for custody, and for an order requiring them to return to nevada.  Some details in the article "The Basics of Family Law jurisdiction" posted on our Child Custody page. You probably should consult with a family law specialist in the near future.