William P. MacLafferty (plaintiff) and Donna J. MacLafferty (defendant) were the parents of two children. William and Donna divorced in 1995, and Donna was awarded custody of the children. Afterward, Donna and William sought court intervention numerous times related to child support and custody time. In a child-support order entered in April 2002, the court required that William pay $364 per week. William filed another petition in October, requesting that the court decrease his child-support obligation, because Donna had started working full-time. William also sought changes in custody time and requested that the court order Donna to comply with the court’s prior orders. The court held a hearing and granted William's petition. The court found that William had established changed circumstances, reduced William's child-support obligation to $313 per week, and granted William's requests related to custody time. Donna appealed, and the court of appeals affirmed. Donna appealed to the Indiana Supreme Court.