Is Petunia magical?

[jdl3811220]

No: HPFGUIDX 160282

This may have already been discussed here, just keep in mind I am 
still sort of new. I've often wondered whether or not Petunia was born 
with magical powers but doesn't use them. She certainly seems to know 
a heck of a lot more about the magical world than she is letting on. 

I once wondered if Dudley was magical, but that question was answered 
when I read about the Dementors' attack on Harry and Dudley in the 
OOTP. Dudley couldn't see the dementors. Harry yelled at him that he 
was running the wrong way - right towards one of them. Ms. Figg could 
see them (being a squib) so I knew then that Dudley had inherited 
Vernon's muggleness. I still wonder about Petunia though. It has never 
been proven that Petunia isn't magical, just that she doesn't do 
magic. I've wonder if she has that ability but chooses not to use it. 

Is there proof against this theory? Has J.K. said something to debunk 
it? 

Jenni from Alabama