Petunia's Family Loyalty

[Chelly]

No: HPFGUIDX 86007

Just got done reading the OOP.  Couldn't put it down.  A few 
questions regarding Petunia.  

It hasn't been explained (or I didn't read that closely) why Petunia 
kept Harry all those years?  Even after Harry and Dudley had those 
mishaps with the snake and Dudley growing a pig's tail.  

What exactly is her loyalty to Harry?

Did Petunia ever meet Dumbledore, Voldemort or see the Dementors?  
She knows about Azakaban through Lily (OOP) but what else does she 
know?

Does anyone think she has even a slight bond or likes Harry?

I am asking becuase of the Howler that Dumbledore sent to her.  It 
just seems unlikely to me that fear of the wizarding world could be 
the driving force to her logic.  Will Petunia realize her strength on 
how it pertains to Harry's survival?

By the way, great posts.  I could read them all night too.

Chelly