 Modred is not the son of Arthur's sister in this version, but the bastard child of Arthur by another woman.After Modred's birth, he had been taken away by a peasant woman to be hidden from Arthur, but she was intercepted by Sirs Kay and Tristan.Arthur then attempted to drown the baby among the other May Babies to keep him from becoming a threat to any legitimate heir; but unknown to Arthur, the baby survived.