Remus frowns at the thought of it. Cutting it out to be rid of the words, he's fairly certain that Sirius isn't joking about that. Not completely, at least. And it would be one way to get rid of the phrase complete. A sort of cathartic release of sorts as well. But that doesn't excuse the fact that Sirius is suggesting he take -- what? -- a knife to himself and purposely injure himself worse to be rid of it. He understands where he's coming from and he understands why, that he might even be better of doing so, but that doesn't make the reality of it any less terrible.

"We can sort it out later," he suggests. "When we're back at school." Because whatever Sirius might plan to do, it's not something they want to be doing on the train. Not when medical assistance, Madame Pomfrey and the infirmary are still hours away yet. And if he's set on doing something stupid then Remus wants to at least be secure in the knowledge that he can get him to help, should he need it.

It should be noted, however, that he hasn't tried to convince him out of anything. And even used the word 'we'. He'll keep Sirius' secret for as long as necessary -- for he knows this is a secret just for him. Sure, the other boy might let James in on it as well, but there's some part of Remus that's selfishly glad in the knowledge that he had come to him first.