He took the stairs two at a time and luckily they cooperated with him. It wasn't too long before he was back in the Common Room, though the Fat Lady wasn't pleased about being woken up. She did smile at Remus when she realized it was him though.

Remus stifled a yawn as he pulled off his clothes and put on a comfortable pair of trousers. He saw Sirius on his bed and clenched his jaw, remembering the scars on Severus' chest. "I've been busy." Remus whispered, not wanting to wake up the others.