The most significant out of King Henry VIII's mistresses was Bessie Blount for about five years since 1515 and onwards.
Blount gave birth in June 1519 to Henry's illegitimate son, Henry FitzRoy. The young boy was made Duke of Richmond in June 1525 in what some thought was one step on the path to legitimising him. In 1533, FitzRoy married Mary Howard, Anne Boleyn's first cousin, but died three years later without any children. At the time of FitzRoy's death (July 1536), Parliament was enacting the Second Succession Act, which could have allowed Henry's illegitimate son to become king.
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Bessie Blount's relationship with Henry VIII lasted for some length of time, compared to his other affairs, which were generally short-lived and unacknowledged. On 15 June 1519, Blount bore the King an illegitimate son who was named Henry FitzRoy, later created Duke of Richmond and Somerset and Earl of Nottingham. He was the only illegitimate son of Henry VIII whom the King acknowledged as his own. After the child's birth, the affair ended for unknown reasons. For proving that King Henry was capable of fathering healthy sons, Elizabeth Blount prompted a popular saying, "Bless 'ee, Bessie Blount", often heard during and after this period.
Soon after the birth of his son, the King began an affair with Mary Boleyn, who may have been partly the reason for Blount's dismissal. Like Blount, Boleyn was never formally recognised as the King's mistress and the position of public maîtresse en titre was never offered by Henry to anyone but Anne Boleyn, who rejected it.