Your mother's husband is your .....
father
Your father's brother is your .....
uncle
Your sister's daughter is your .....
niece
Your mother's or father's father is your .....
grandfather / grandpa
Your mother's or father's mother is your .....
grandmother / grandma
Your brother's son is your .....
nephew
Your sister's mother is your .....
mother
Your mother's sister is your .....
aunt
Your aunt and uncle's children are your .....
cousins