Sir Thomas Ashby is the man whom Rosalie marries. Although he is ugly, Sir Thomas is also rich, a quality which Rosalie's mother believes is most important in a suitor for her daughter. After the two are married, Rosalie admits to Agnes that the man is even worse than she first realized him to be. He sequesters her at Ashby Park because she flirts with an old friend but continues to have his own mistresses and girlfriends.
