Regulus frowned more deeply. He didn't think Sirius really wanted to talk to him, just to rant about their mother. Despite everything, Regulus couldn't help but love the woman. She was a hard person to live with, that was for sure... but she was family. He truly believed that SIrius had broken his mother's heart.
He shifted his weight a bit uncomfortably. "We're all supposed to sit together at dinner," he pointed out.