A: Do you know Mary?
B: Mary who?
A: Mary McDonald.
B: Of course I do.
A: Do you know her little brother?
B: Yes, of course I do. I know her brother and her mother and her father too.
A: Do you know her older sister?
B: Yes, of course I do. I know her older sister Betty and her younger sister Sue.
A: Do you know Aunt Esther?
B: Yes, of course I do. I know her aunts, her uncles and her cousins too.
A: Do you know husband, Bobby?
B: Yes, of course I do. I know her husband and his brother and his father too.