Oh Rook was definitely wondering just which of Alastair's Death Eater friends he'd learned all of that from, and just how long he thought he was going to hide the fact that he actually knew what he was doing, but no, he didn't at all mind watching it. In fact, in that moment, what Rook really wanted was a rematch--a real one, where the slighter man didn't hide or hold anything back. He so rarely got to spar with anyone whose established style was so different from his own, and he wanted to know what this son of a Death Eater was really capable of.
"Then why are you in my basement?" he asked, arms cross over his chest, maybe showing them off, maybe not; after all, it took almost nothing to show off his strength. He looked Alastair over, trying to find the muscles beneath his fitted and deceptive clothing. The use of the name he'd specifically told him not to use was mildly annoying, but not enough to actually do anything about. If this were almost anyone else, he would have delivered a glare or vague threat, but this one was interesting enough to get a pass this one time. "Seems like if you didn't want anyone to watch, you'd find somewhere with more privacy."