She's my mother's sister, so she's my

sister-in-law

They are my father's mother and father, so they are my

niece

He is my sister's husband, so he is my

mother-in-law

He is my sister's son, so he is my

nephew

She is my uncle's daughter, so she's my

brother-in-law

She's my brother's daughter, so she's my

grandparents

She is my brother's wife, so she's my

aunt

She is my wife's mother, so she is my

cousin