Emily is the daughter of Joseph. Joseph has a brother named William. William is married to Linda, and they have a son named Ethan. How is Emily related to Ethan, and what is Linda's relationship to Joseph? Make your response very short.
Emily is the daughter of Joseph, and Ethan is the son of William, who is Joseph's brother. Thus, Emily and Ethan are first cousins because their parents are siblings. Linda, being William's wife, is Joseph's sister-in-law because she is married to Joseph's brother.