Georgia already knew about Cassie; she'd been furious at the Hufflepuff for a few weeks for not telling her. She also knew about Amber because he'd mentioned it before (although it was too weird to contemplate why Amber would be Link's beardy person if she knew). But PUCK knew too? Blimey O'Reilly's pajamas, did everyone find out before her? "...I would not really worry about telling the whole world, I think you already have."