When the matriarch of Joe's affluent family dies, it is revealed that the family's success was due to a spell that she had cast on her husband, who is not what he seems.
Now Joe's Grandpa wants revenge and with his wife gone, he turns to the heir of the family, Joe, to wreak his vengeance on. He starts by changing Joe's girlfriend Kate to be more to his liking.
transformation, mind control, age progression, incest in entries after part 1