Why DD trusts Snape?/ LIfe Debit

[Tonks]

No: HPFGUIDX 133451

--- In HPforGrownups at yahoogroups.com, "fanofminerva" 
<drjuliehoward at y...> wrote:
> The Unbreakable Vow requires a third party, and so far no one has 
> hinted that they understand why DD trusts Snape so much.  Of 
course, this alone does not negate the hypothesis.  

Tonks:
This thought did cross my mind. The third person could have been 
McGonagall, or maybe Fawkes???  But would JKR use this twice??  
Maybe there is another reason, more intriguing, that we will find in 
book 7. If it is an unbreakable vow, than I too think that is was 
that Snape must protect Harry.  What happens when you have to 
protect both Harry and Draco, if they should attack each other?

Also what does it do to a life debit when the person that you have 
the life debit to dies and you are part of the reason that it 
happened? (Snape giving the information to LV which resulted in 
James' death.) Maybe this is important to why Snape must protect 
Harry.  Maybe Snape will not only loss his life, but his soul if he 
does not give his own life for Harry. Has she ever told us what 
happens to a life debit if the person you have the debit to dies?  
Or God forbid, they die and it is because of something that you have 
done?  I can't help thinking that there must be something to the 
fact that there was a life debit of Snape to James and that it was 
Snape that gave LV the information that caused James to die. That 
just has to invoke some sort of special magic (dark perhaps) of it's 
own. 

Which leads us to DD and Snape. Did DD save Snape's life? Was there 
a life debit there too? And what now?? I tend to think that DD and 
Snape agreed that Snape would do it (kill DD) to save Draco. I don't 
think Snape wanted to kill DD, and that maybe there is something 
more to it all because of Snape's debit to James (and maybe now to 
Harry) and whatever bond that Snape and DD had.  

I am sure that there must be more to the Snape/Harry/DD thing than 
we really know or can even guess at.  And Snape is now damned either 
way he turns. It seems that Snape plays an even greater role in the 
books than we ever thought that he would. I still think that he is 
on DD's side, but Snape is in a very difficult place now and how can 
he get out of this between a rock and hard place position? I think 
there are *severe* (read other worldly, read more ancient magic, 
dark) consequences to what Snape has done, even thought I don't know 
quiet what or why.

Tonks_op