How is he greeted at the castle? Who are the two women living at the castle?

Gawain is welcomed by the lord of the castle, a massive, civilized, capable-looking man who sees to it that Gawain receives the best of care. After dinner, the company attends the Christmastide mass, where Gawain meets the lady of the castle. She is incomparably beautiful, even lovelier than Guinevere, and she is accompanied by an ancient noble lady, whose utter ugliness enhances her own beauty.