The law of custody and visitation is expanding to include the possibility of non-biological and non-adoptive parents\u27 legal access to children. The concept of the psychological parent or functional caretaker is becoming increasingly prevalent and influential in state law. Moreover, the ALI Principles of Family Dissolution include two categories of psychological parents - parents by estoppel and de facto parents - in its proposed guidelines for who can petition for custody and visitation rights to children. Yet, both state law and the ALl Principles exclude caretakers who receive compensation - including foster parents, paid child care providers and surrogate mothers - from the categories of psychological parents to whom courts may grant ...