Character Analysis
Auntie Muriel is a far cry from being a sweet old lady. When she, Harry, and Elphias are talking at the wedding, she's actually pretty antagonistic.
When Harry realizes that he and Dumbledore were born in the same place—and Dumbledore had never told him—she doesn't miss the opportunity to make him feel even crummier about that realization than he already does:
AUNTIE MURIEL: Oh, I'm sure Rita Skeeter thought it well worth a trip to Godric's Hollow to take a peek into that old bird's rattled cage.
HARRY: Godric's Hollow? Bathilda Bagshot lives at Godric's Hollow?
AUNTIE MURIEL: Well, that's where she first met Dumbledore.
HARRY: You don't mean to say he lived there too?
AUNTIE MURIEL: The family moved there after his father killed those three Muggles. Oh, it was quite the scandal. Honestly, my boy, are you sure you knew him at all?
Luckily, we don't have to endure her for too long: The wedding breaks up when the Death Eaters conquer the Ministry and all you-know-what breaks loose.