 It was rumoured that one or both of Mary's children were fathered by the King, although no evidence exists to support the argument that either of them was the King's biological child.Henry VIII's wife, Catherine of Aragon, had first been married to Henry's elder brother Arthur when he was a little over fifteen years old, but Arthur had died just a few months later.Henry later used this to justify the annulment of his marriage to Catherine, arguing that her marriage to Arthur had created an affinity between Henry and Catherine; as his brother's wife, under canon law she became his sister.