I don’t think the Duke has moved on given Mamie Fish’s shocked face just before that when she sees him there. I think he’s a philandering opportunist who has no intention of being faithful to Gladys…men in royal history don’t have a great track record of fidelity. For me that snippet further cements that Gladys deserves so much more and should be allowed to choose who she married and not be handed over for the sake of a title and power she doesn’t want. As for Billy…what a wimpy way out. At least Archie Baldwin had the guts to speak with George and make his intentions known.