Her last serious suitor was John Charles Villiers (1757–1838). He was the second son of Thomas Villiers, 1st Earl of Clarendon, and for a time overwhelmed Stuart with his admiration. Her parents encouraged the match, and she was tempted, but she finally decided that a "love match without any love is but a bad business". As a result, she never married. In 1791, Villiers married his cousin Maria Eleanor Forbes, a daughter of Admiral John Forbes, and in old age he inherited the family's titles and estates from his older brother Thomas Villiers, 2nd Earl of Clarendon (1753–1824), who never married.