Arthur/Gwen/Lancelot - Their Story

AU - Arthur and Gwen get married. During the coronation Guinevere recalls Lancelоt. Morganа notices Gwen and Lancelot views and comes up with a cunning plan. The High Priestess talks with her friend about it, and advises to meet Lancelot. So the queen makes it - she leaves a letter for her lover. Morgana followed them and went to Camelot to tell about it Arthur. King immediately goes to the forest...