Lucy Walters (Waters) was the daughter of a Welsh royalist who went into exile in the Hague with Charles II's court. She became the mistress, firstly of Colonel Robert Sidney and then of Charles II. She gave birth on 6 April 1649 to his son, James, Duke of Monmouth and later to a daughter, Mary. She was bribed by Charles's friends to return to England and was arrested in London in 1656 as a spy. She was exiled to Holland and later died at Paris. It was widely rumoured that she and the King had married, something which he strenuously denied.