"I wasn’t –" Oh no, he was sitting down. He meant to terrorize him until they boarded the train, didn’t he? It was suddenly and painfully apparent that Remus would be having a dismal fifth year by the way things were already shaping up.
Politely, the boy waited until Mr. Black was settled and ready to make his case known before speaking. It was all he could do not to squirm, his anxiety levels increasing. "I’m ... not sure what you mean, sir." Remus really didn’t. In all honesty, the very idea that he had induced Sirius to do anything was simply out of the question. He barely listened to him when he warned not to turn Peter’s socks into toads, let alone abandoning his family.
For his credit, he did look respectfully mournful and sympathetic.