All week long he might not have come right out and demanded to know why she was back, but Hermione knew he was always just moments away from blurting out his questions. He was a patient man, likely the only good trait that came out of his years suffering in Azkaban under the influence of the dementors. When the moment was right, he'd have his answers. She had to be careful. There was a valid reason why he was so good at his job.