Ответ:

1.My son's daughter is my:Granddaughter

2.My Mather's father is my :Grandfather

3.My cousin's mother is my:Aunt

4. My son's sister is my :Daughter

5.My father's mother is my:Grandmother

6.I'm his wife, he's my:Husband

7.My brother's son is my : Nephew

8.My dad's brother is my:Uncle

9.My uncle's Daughter is my :cousin's

10.My Daughter's brother is my:son

11.I'm her husband, she's my:wife