Touch of Satan/Fridge

Fridge Logic

 * Melissa says the Devil cheated her, but technically, she's the one who broke the contract.
 * Also, it's assumed at the beginning that Melissa is the daughter of the middle-aged farm couple, Luther and Molly. However, once it's revealed that Melissa is, in fact, the 127-year-old sister of the elderly woman, it begs the question, who the hell are Luther and Molly?
 * Quoth Paul Chaplin: "The people who are apparently her parents? It's unclear who they are. It's never really explained. They may just be walnut farmers who happen to own a witch."
 * Could be that they are her children or grandchildren... which only raises another question: If Melissa already has children, why does having sex with Jodie oldify her?