Look at the sentences, then you should know how these people are related.
Jane Austen's characters in "Persuasion"
Anne and Mary are sisters. Mary and Elizabeth are sisters. Elizabeth is Sir Walter’s eldest daughter. Sir Walter has got three daughters. Mary is married to Charles. Charles Musgrove has got two sisters: Henrietta & Louisa. Louisa gets married to Captain Benwick. Henrietta is married to Charles Hayter. Anne is married to Captain Frederick Wentworth. Admiral Croft is married to Sophy, Captain Wentworth's sister. Mrs. Musgrove is Mary's mother-in-law. Mary has got two sons. Mrs. Musgrove and Mrs. Haytor were sisters.