First, let's get this out of the way: Mrs. Wattlesbrook is her real name. We wonder what kind of gentleman Mr. Wattlesbrook is. Or was. She probably killed him with her stuck-up attitude.
Moving on, the proprietress of Pembrook Park (say that five times fast) is a stickler for tradition. She's Jane's Lady Catherine: she's obsessed with customs and class, though she clearly has none of her own, as she treats Jane like a piece of dirt.