Sirius' eyes widened as he put two and two together, and beat Remus to it. He was off the couch in an instant, pulling the door open and tugging his friend into a tight embrace. He couldn't help clinging a little, especially after having gone back to Azkaban.

He hadn't told Remus about his little trip, of course -- he never would've allowed it. But it would be fairly easy for him to figure out, considering the robe he was wearing. He wished, once again, that he'd had the chance to change.