Marge Dursley: You mustn't blame yourself about how this one turned out. It's all to do with blood. Bad blood will out. What is it the boy's father did, Petunia?
Petunia Dursley: Nothing. He didn't work. He was unemployed.
Marge Dursley: And a drunk too, no doubt?
Harry Potter: That's a lie.
Marge Dursley: What did you say?
Harry Potter: My dad wasn't a drunk.
(A glass explodes in Marge's hand, she later resumes the topic...)
Marge Dursley: Actually, it's nothing to do with the father. It's all to do with the mother. You see it all the time with dogs. If something's wrong with the bitch, then something's wrong with the pup.
Harry Potter: Shut up! Shut up!
Marge Dursley (raising her finger): Right. Let me tell you...
(Her finger starts to blow up and her body soon follows ending in Marge floating away...)
Harry Potter: You knew? You knew all along and you never told me?
Petunia Dursley: Of course we knew. How could you not be? My perfect sister being who she was. My mother and father were so proud the day she got her letter. "We have a witch in the family. Isn't it wonderful?" I was the only one to see her for what she was. A freak! Then she met that Potter, and then she had you... and I knew you would be the same. Just as strange, just as... abnormal. And then, if you please, she went and got herself blown up! And we got landed with you.