What is the significance of Yezad's visit to Villie Cardmaster?

The fact that Yezad did not want Roxana to know he was going to Villies tells the reader that Yezad knows he should not go there. He gives Villie money to play Matka for him, knowing that he cannot afford to lose. When Yezad wins, he plans to lie to Roxana about where the money comes from.