Lily being spared/Snape "re-joining" DD

[mnaper2001]

No: HPFGUIDX 104836

--- In HPforGrownups at yahoogroups.com, Jocelyn Grunow <aandj at l...> 
wrote:
> What about this quote:
> 
> " but your mother needn't have died... she was trying to protect 
you"
> 
> WHAT!
> 
> WHY would Voldie, terror of the WW, have spared Lily?  Do you think 
LV was
> lying?  It is just such an odd thing to say.
> 
> Jocelyn

Ally:

I think that either:

a)  He was lying and trying to make Harry feel guilty, just like he 
lied about Hagrid; or

b) In a twist, some DE (Snape? Pettigrew) made a deal to have Lily 
spared - along the same lines as Pettigrew getting a new arm - but V 
didn't follow through with it.

Someone pointed out - either here or at mugglenet - that DD says at 
Karkaroff's trial that Snape "RE-joined" their side.  As opposed to 
just saying he joined their side or he's been a spy for a long time.  
This seems to indicate he was for the Order, then against, then for 
it again.  Maybe he switched sides as a spy when V was at the height 
of his power, as DD said, but then had a crisis or was lured back to 
V somehow just before the Potters died.  He made his little pact with 
V to try to save Lily, was betrayed by V and then returned to DD 
after the Potters' deaths and provided helpful information against 
the remaining DES?  

That whole "re-joining" thing was not something I ever considered 
before, but it is intriguing.  And if Snape was somehow connected 
with the Potters death but still managed to make his way back to DD, 
wouldn't that satisfy JKR's warning that Snape wasn't too nice and we 
should keep an eye on him but still allow him to be the grey, 
complicated character that she promises he is?