[A pause and then a soft chuckle and shakes his head.]

Oi oi, don't cut him up too badly unless he does something to deserve it. Judging him now would be premature. He'd definitely only have misdeeds this far.

[Yup... Lupin trusts him with his life and this is how Smoker repays it, making him wait and telling his girlfriend "don't cut him up too badly."]