It goes without saying that noncustodial parents are liable for child support, but the law is still developing as to whether other people in parental roles—namely stepparents—would be liable as well. The recent matter of A.S. v. I.S., 130 A.3d. 763 (Pa.2015), which the court believed was of first impression, has helped clarify the law on the subject.

In A.S., when the mother and the stepfather married, mother already had children from a previous relationship. During the course of their marriage, the stepfather developed a loving relationship with the children. Unfortunately, the marriage between the mother and stepfather broke down and was eventually dissolved in divorce.