Mention of Draco made her nervous. He wasn't coming right out and declaring he knew she had some sort of twisted, inappropriate relationship with the tracker, but that didn't mean Ginny wasn't whispering in his ear when they were alone. She didn't know the first thing they talked about when they weren't engaged in physical acts best not thought about. The conversation needed to be steered away from Draco lest it get even more uncomfortable than it already was.