For a moment, the room was silent. Snape's expression was stoic- he was sure he'd won back the upper hand in this conversation, but the triumphant smirk he was holding back would be premature if he displayed it now. But soon. "Indeed." He said, after he was certain the silence must have become uncomfortably heavy for Parvati. His voice barely rose above a whisper. "I'm certain that screeching at your guest, however, is never the polite thing to do. I'd have thought that the wife of such a prominent pureblood would know when to bite her tongue."