Remus sits with that for a bit, turning it around in his head.  Survivor’s guilt, he thinks. It’s strange, how having a name for it makes things feel slightly better, more manageable. He wonders if it’s maybe the feeling he gets when he thinks about Estee, or if that’s a different thing, seeing as it had been suicide he avoided. Then he shakes his head, because that’s not what this conversation is about. It’s about Harry, and although Remus  does feel guilty about Harry, that is not why he cannot help Sirius when he finally gains custody of him.