Your parents' daughter
My sister
Your sister's daughter
my niece
Your brother's son
my nephew
your mother's brother
my uncle
your mother's sister
my aunt
My spouse's mother
my mother-in-law
Your uncle's children
my cousins
Your father's wife. She isn't your mother.
stepmother
your stepmother's children. They are Not your sisters or brothers.
stepsisters
your spouse's sister
My sister-in-law
your daughter's son
your grandson
