Khan obviously was unaware of Thomas and Raymond's secret meeting, and the same went for Rebecca. The timing had been perfect, keeping any potentially troublesome party in the dark. Learning about it would change the celebration's mood, but their ignorance allowed them to try to enjoy themselves.
Rebecca and Khan returned to the terrace once their conversation was over. The scenery there didn't change. Anastasia and Luther supported Monica as the many guests tried to claim her attention, but Princess Felicia and Prince William did their best to divert part of those attempts.
Khan and Rebecca's reappearance switched the guests' focus, turning them into a crowd hungry for attention from those relevant figures. The two were more important than everyone else, and a sea of fake smiles unfolded in their vision, seemingly warning them about the imminent torrent of polite talks.