The worry line on his forehead only deepened as Sirius spoke. It was disturbing to hear that he'd basically been blacking out, losing himself for sometimes hours at a time. Was he sick? Was it something Malfoy did to him? The latter seemed the most likely, but Remus didn't want to believe that even someone like Lucius Malfoy could be so cruel.
He wasn't sure if Sirius remembered some of the words exchanged between them. Probably not, if he was losing the bits of himself that seemed completely unlike him. Remus chose not to bring them up. Sirus was distraught enough without that on top of it. "You're not crazy, Pads," he said softly, but did pull his hand back so he wasn't forcing Sirius to endure his touch. "Something's happening to you, and we'll figure out what it is."