Eventually after a month Bellatrix had begun to be around more and shared the news of the wizarding world. Snape had been made headmaster at Hogwarts. Harry and Ron had quite unsuccessfully attempted to break into Gringotts. But, Bellatrix showed her the Hufflepuff cup she had removed from her vault. Hermione knew that this would be a setback for the order. Shape told them that little mention had been made by anyone about an attempt to rescue Hermione. She was surprised that he still knew of Order events. But, Harry had returned to Order headquarters after the Gringotts fiasco. So, anything that Harry knew so did Voldemort. In a private moment he admitted to Hermione that he had in fact been a spy for the Order but quit when Dumbledore forced Snape to murder him and the Order abandoned Hermione.