Queen Victoria married her first cousin Prince Albert. That’s rather like a marriage between Prince Harry and Princess Beatrice. As unusual as the marriage may seem now, it was a happy one, and they had nine children together.
King Charles II
King Charles II married Catherine of Braganza in 1662. The couple are credited with introducing the tea drinking custom to the British court. But during her marriage to the King, she had to accept his many affairs. She did not bear him any children, but his many mistresses did. Notably, the flamboyant actress and sex worker, Eleanor "Nell" Gwyn, bore him two sons.