King Arthur

King Arthur returns to Camelot, but notices a huge yellow inscription on the snow: "King Arthur is a massive cuckold!" Annoyed like a puma, he calls upon Merlin to investigate the author of the misdeed. Two days later, Merlin requests an audience with the King:
“Majesty, two pieces of news: the first is that the inscription was made with Lancelot’s urine.”
“What a bastard, who would have thought! And the second?” thunders King Arthur.
“The second… is that the handwriting belongs to Guinevere!”