Children of either sex leave their family of orientation one by one as they are getting married.
2.
From the perspective of children, the family is a " family of orientation " : the family serves to locate children socially and plays a major role in their enculturation and socialization.
3.
Tanaz finds this uncomfortable because she distinguishes between her family of orientation, the one that raised her, and her family of procreation, the family she will create through marriage, and she wants that family to be independent following American culture.