Regulus was more surprised that Sirius had chosen to include him with his group of friends in that statement than the way that Sirius was looking at their mother. After a moment, though, he followed the other boy's gaze. Walburga did look lovely, and she and Orion made quite the couple on the dance floor.
"She expects we can do that," he nodded at the dance floor. "I may be a Seeker, but I never took to dancing the way they do."