parent
(3) As used in paragraph (b)(2)(iii) of this section, the term parent means the natural or adoptive parent, or the stepparent who is married to the child's natural or adoptive parent and is legally obligated to support the child under a State law of general applicability which requires stepparents to support stepchildren to the same extent that natural or adoptive parents are required to support their children; and the term spouse as used in paragraph (b)(2)(iv) of this section means an individual who is the husband or wife of the child's own parent, as defined above, by reason of a legal marriage as defined under State law. (4) Where there are two or more dependent children living in a place of residence with two other persons and each of such other persons is a relative who has responsibility for the care and control of one or more of the dependent children, there may be two AFDC families (assistance units), if neither family includes a parent or sibling included in the other family pursuant to 206.10 (a)(1)(vii).