Answer: Queen Guinevere fell in love with Sir Lancelot.
Some extra relevant information:
According to Arthurian legend, Queen Guinevere, the wife of King Arthur, fell in love with Sir Lancelot, one of the knights of the Round Table. Their love affair is one of the most famous and enduring stories in Arthurian lore. Lancelot, known for his bravery and prowess in battle, was considered one of the greatest knights in Camelot. However, their love ultimately led to the downfall of King Arthur’s kingdom and the Round Table. This tragic love triangle between Guinevere, Lancelot, and King Arthur has captivated audiences for centuries, serving as a timeless tale of forbidden love and betrayal.