Why was Lily to be spared? (WasRe: Voldemort to Vapormort - How Did They Know?)

[amiabledorsai]

No: HPFGUIDX 150442

Nikkalmati: 
> BTW I am not clear how LV was supposed to "give" Lily to Snape. She
> does  not appear to be the type to be "given" and I can't see SS
> keeping her tied up in the dungeon of Hogwarts or Imperiusing her
> to stay in his house somewhere. 

Amiable Dorsai:
Frankly, the whole idea disturbs me so much that I seldom write about
it, but it was my suggestion that Lily was to be spared because Voldy
had promised her to someone.  As to how that someone would keep her,
well, a little Memory Charm here, a bit of Amortentia there... Presto!
your very own Lily doll.  It walks, it talks, and is, uhhm, fully
functional.

Shame it's not really Lily, anymore.

Reading "Prisoner of Azkaban", I had trouble understanding why Voldy
hesitated to kill Lily at all.  At the end of PoA, I was convinced
that LV had promised her to Peter as a reward for his treachery. 
Peter seemed to me to be the sort of selfish and self-deluding wretch
who would settle for a simulation of love, rather than the real thing.

Reading "Half-Blood Prince, I began to wonder if maybe LV wasn't
supposed to save her for Snape...

Now before all the Snape fans jump on me, DDM, ESE, or otherwise,
Snape does not strike me as the sort who would settle for a Lily doll,
not really.  Much as I despise the man, he seems too proud for that. 
But if the various "Snape loved Lily" theories are true, I have little
trouble seeing him ask Voldemort for Lily's life as a payment for
services rendered, either in hope of gratitude, or out of guilt for
spilling the Prophecy--and I have zero trouble seeing him devote the
rest of his life to vengeance if Voldy promised to spare her, then
killed her anyway.

Nikkalmati:
> Way too risky for a spy.

Amiable Dorsai:
But not for a conqueror.  If the Dark side won, as they seemed poised
to do, Peter (or Snape) would be just that.

As to timing, Catherine objected:

Catherine:
   Except that Snape had already turned against Voldemort and was
> working as a spy at the time that he (Voldemort) went to GH to
> kill Harry. In the penseive scene in GoF Dumbledore clearly says
> that SS turned spy against Voldemorst at "great personal risk"
> before his downfall.

Amiable Dorsai:
Well, that's what Dumbledore thought, and it may be true.  In any
case, Voldemort thought that Snape was still working for him, spying
on Dumbledore, so Snape would be in a position to ask Voldy for a boon.

Amiable Dorsai