jkr site - who is on the phone?

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Haraheart asked:

> > who is on the phone?  How do I answer it? and what is the 
> > significance of the watch face changing when Peeves strikes? Any?
> > Sarah x

Alora replied:

> That's JK Rowling (Jo)  calling!  Just hit the little phone when 
it 
> rings and you can hear her say something

I disagree - I think it's her daughter Jessica. It sounds like when 
you call someone and their child answers, slightly hesitantly.