What does sir mador de la porte do to the queen?

Sir Mador de la Porte is a character from the Arthurian legends, specifically in the story of Sir Gawain and the Green Knight. He challenges Sir Gawain to a duel, claiming that Gawain has wronged him. In some versions of the tale, he attempts to harm the queen by accusing her of dishonor, but Gawain defends her honor and ultimately defeats Mador, showcasing themes of chivalry and loyalty.