Draco didn't miss the fact that Goyle and Nott were... were they friends? Had this happened before and he'd missed it, somehow? That was entirely possible, he hadn't paid much attention to any of his dormmates last year. Then again, he'd been a bit busy.
"Idea? Oh." Astoria's warning came to mind, and he shook his head. "We'll need to figure a way around it looking obvious, otherwise he'll boot you from the team."