Treason in Arthurian legend his unwillingness to reveal the affair to Arthur and his concealment is a violation of Arthur's trust. Gawain is duplicitous throughout Sir Gawain and the Green Knight. He is tempted by the wife of Bertilak, a lord who offers his home to Gawain. While Gawain eventually learns the harms of duplicity, Gawain violates “his responsibility to honor the host-guest relationship”. Gawain keeps the magical girdle, refusing to honor his agreement with Bertilak that he will give everything Lady Bertilak gives to Gawain to the Lord. Instead, Gawain hides the girdle. This treason against the Lord necessitates a physical punishment from
Lady of the Lake mother of Jesus as the Lady of the Lake, evidencing fusion between Arthurian legend and middle-Christian history. Alfred, Lord Tennyson adapted several stories of the Lady of the Lake for his 1859–1885 poetic cycle "Idylls of the King". He too splits her into two characters; Viviane is a deceitful villain who ensnares Merlin, while the Lady of the Lake is a benevolent figure who raises Lancelot and gives Arthur his sword. Some other authors choose to emphasize a single character. Modern authors of Arthurian fiction adapt the Lady of the Lake legend in various ways, often using two or more