Nuclear families are typically “traditional” family* units, meaning there is a mother-figure, whose primary role is caretaker of the family, a father-figure, whose primary role is to provide financial stability, and the children (Canetto, 1996). Usually, marital couple and their children are considered to be part of the nuclear family, but generally does not include extended family members, such as grandparents, aunts, uncles, and cousins. Recently, there has been a shift in this definition of nuclear families. The modern definition of a nuclear family invites other persons, such as grandparents, aunts, uncles, cousins, same-sex partner, and other members to be included within the nuclear family structure (Canetto, 1996). Because of the change in the definition of the nuclear family, the application of some therapy models and the decision of who to include from the family system in treatment may also be changing.