I thought that seemed a bit off for Lupin, being all wanky like that. I mean, in the other books he is quite miserable and wallowing in self pity all the time (although I've never been a werewolf, so therefore I can't say that I wouldn't be wallowing either), but his actions certainly didn't endear me in DH. I mean, I like him; POA made him awesome to me, but he just went rapidly downhill.