Lupin's Motives? (was Re: Lupin was the spy)

[snow15145]

No: HPFGUIDX 102872

Bren:

That really puzzles me too, even after all the ESE!Lupin talk.

The thing about ESE!Lupin theory that bugs me is -- what does Lupin
gain by all this? I was under the impression that Voldemort & co.
hated *half*... EVERYTHING. True, VM might have been the only one who
knew of Lupin's true ally (so DEs' hatred of half-humans wouldn't
matter), but I can't imagine Voldemort welcoming Lupin with open
arms. Although, who would say NO to someone willing to spy one's
enemy (ie. the Order)? But I thought Lupin feared that his friends
would left him. He wanted to be liked, very badly. He couldn't have
his Prefect authority over them. Sure, he might not want all that
now, but 15 years ago I think he still did. So what made him decide
to betray his friends? The only friends who accepted him for who he
is, not what he is.
>snip<

Snow:

Remember that at some time before the Potters deaths, Sirius feels 
that Lupin is the spy. Sirius was suggesting to James to change to 
Peter as secret keeper and not Lupin for this reason. His friends 
possibly shunned Lupin because they did suspect him as the spy. If 
you notice in the picture of the original Order Lupin was the only 
one not standing by James, Sirius and Peter. Lupin in the picture is 
actually two rows back.  Also I don't recall Lupin being in the 
Potters wedding picture, although he may have been and it wasn't 
stated.
 
If Lupin has none of his old friends to support him as they had in 
the past and feels that they suspect him of being the traitor, he may 
have turned traitor. At the last minute, after his betrayal, Lupin 
felt the need to confess what he had just done to the Potters and 
warn them of his betrayal. But Lupin was too late. He walks into the 
Potters home to find James already dead and Lily being confronted by 
Voldy and tells Lily to run. Voldy may have, for many devious 
reasons, spared Lupin's life.


P.S. Why didn't the Potters choose DD as the secret keeper?