Absent rare exception, both parents should follow their court ordered parenting plan. A parent that is being denied parenting time can petition the court for enforcement of the current order and ask for contempt and/or sanctions. They can also petition the court to modify the current order if they meet the requirements under ARS 25-411 and 25-403. If the parents live in different states then the child custody jurisdiction might come into play on which state has the right to issue new orders or enforce the current order. In this situation, speaking to a lawyer is a good first place to start gathering important legal information before moving ahead.