Did it ever occur to you that the show was scripted, and she was just playing a role?
Yeah, sure!
Next you'll tell me that WWF Wrestling is fake!
Actually, no. TV doesn't like to cast African-Americans in the crazy villain role.
Maybe a plot was roughed out by writers, maybe she was acting a little, but they must have found a lot of that character in her personality, though I do notice that she was ordained as a minister this year, so possibly she's changed.