The hug really caught Regulus off-guard, and for a moment he could just picture himself: Sirius hugging him, and him with his arms awkwardly sticking out behind Sirius's back. As the shock started to wear off, Regulus, too, patted at his brother's back, though much gentler.
"I hope so," he agreed when pulling back. Regulus scratched at the back of his neck. He looked around at the lake. "What should we do now?"