Nothing about Tara makes a lot of sense anyways. She's from a family of backwards hill people, but they were nice enough to send her to college. The Women in her father's family become demons, which she inherited from her Mother. This is also a lie created by the men in her family, who somehow benefit from it after marring off the women, Her Mother taught her magic, yet her Father and Brother hate magic. There's also a joke about casting a redhead as Lois Lane in there somewhere. She doesn't have any viable means of support, but is going to college from out of state. To make any of this make sense, I propose that Tara's Mom was killed in a magical accident. Mr.McClay decided to lie to his daughter, claiming she transformed into a demon, and you will too, if you practice magic. That explains why her brother hates magic as well, and her father transformed into a grump. He's also not upset he's losing a domestic servant, of course he knows Tara is smart and will be a great witch, he sent her to college after all, but he's afraid he'll lose her, and she's all he has left of his wife, and trying to keep her on the farm is the best way he knows (again, Lovecraftian hill person) to keep her from getting shot, or addicted to magic, or lost in a demon world. Is he still trying to stifle her out of fear? Sure, but at least he has a reason now, unlike casting a character who's been a brunette since 1938 as a red head. And you can use magic as a metaphor for feminine power, if you are into that kind of thing.