Trivia: At the end of the film, the witches in black robes are all wearing red-and-white striped socks. This is a nod to one of the most recognizable witches of all time, the Wicked Witch of the East in "The Wizard of Oz."
Trivia: The entire outside of the house is fake - it's just a shell. Even the blossoms on the trees are fake - they're silk.
Trivia: The production hired a practising witch to be a consultant. However, after being hired, the witch began making insane demands, including wanting a percentage of the gross, some merchandizing rights, and an additional $250,000 on top of what she was already being paid. After the production understandably refused, she began screaming in tongues over the phone and "cursed" the production, then began lawyering up. The studio heads freaked out, and paid her just to get her to leave the production.
Answer: She is the one from the opening sequence, their "great, great, great" grandmother who started the whole "curse" thing.
Bruce Minnick