1. My wife's mother is my .. mother-in-law. and her father is my ...father-in-law .
2. My wife's sister is my .sister-in-law .. and my wife's brother is my . brother-in-law.. .
3. My uncle's son is my .cousin
4. My mother has a sister, her son is my mother's .nephew.. .
5. My father has a brother, his daughter is my father's .niece..