Arthur was son of Uther of Pendragon and Igraine and he married Guinever, who was a noble who lived near the kingdom of Camelot and before marring Arthur she had had loves with Sir Lancelot, who was a knight. After Arthur married Guinever she continued meeting in secret with Sir Lancelot. And also on those times Morgana, who was Arthur's half-sister, had already tricked Arthur transforming her self to look like Guinever for having sexual relations with him.