What about Lupin?

[a_rude_mechanical]

No: HPFGUIDX 55521

I had an interesting thought while rereading PoA.  I have always 
loved Lupin, he's one of my favorite characters.  He's interesting 
and he always remains so calm and cool.  But this time, I had a 
totally different emotional reaction to him.   This is my question:  
is it possible that Lupin is not the good person that we believe him 
to be?

Possible reason for thinking that Lupin is...not good. (I just can't 
call him evil, I can't!)

1) The sneakoscope goes off on the train when the trio enter Lupin's 
compartment.

2) He doesn't bother to tell Dumbledore about Sirius being an 
animagus.  Could it be that he didn't want Dumbledore to know that 
Pettigrew was also?

3) Much of his dialogue in the last few chapters is ambiguous, and 
could be read several different ways--for example:

(when Lupin finds out Sirius got a copy of the Daily Prophet inside 
Azkaban)

" 'How did you get this?' Lupin asked Black, thunderstruck.

'Fudge,' said Black. 'When he came to inspect Azkaban, he gave me his 
paper.  And there was Peter, on the front page...on this boy's 
shoulder...I knew him at once...'

'My God,' said Lupin softly, staring from Scabbers to the picture in 
the paper and back again.  'His front paw...'"

It is possible to read this as though Lupin and Pettigrew were trying 
to keep this all a secret...

4)  (this is straight from PoA, and I hadn't noticed it before) Black 
believed, back when all the Voldie stuff went down, that Lupin was 
the spy.  Why?

I know it's kinda far-fetched, but it really can be read two ways.  
What do y'all think??

Elisabeth