Animal Family

• Cousins: two people that share the same grandparent(s)
Such systems generally assume that the mother's husband has also served as the biological father. In some families, a woman may have children with more than one man or a man may have children with more than one woman. The system refers to a child who shares only one parent with another child as a "half-brother" or "half-sister." For children who do not share biological or adoptive parents in common, English-speakers use the term "stepbrother" or "stepsister" to refer to their new relationship with each other when one of their biological parents marries one of the other child's biological parents. Any person (other than the biological parent of a child) who marries the parent of that child becomes the "stepparent" of the child, either the "stepmother" or "stepfather." The same terms generally apply to children adopted into a family as to children born into the family.
Typically, societies with conjugal families also favor neolocal residence; thus upon marriage a person separates from the nuclear family of their childhood (family of orientation) and forms a new nuclear family (family of procreation). However, in the western society the single parent family has been growing more accepted and has begun to truly make an impact on culture. The majority of single parent families are more commonly single mother families than single father. These families face many difficult issues besides the fact that they have to rear their children on their own, but also have to deal with issues related to low income. Many single parents struggle with low incomes and must cope with other issues, including rent, child care, and other necessities required in maintaining a healthy and safe home. Members of the nuclear families of members of one's own (former) nuclear family may class as lineal or as collateral. Kin who regard them as lineal refer to them in terms that build on the terms used within the nuclear family: