maybe it's time for "that talk".. I mean if she's really intrested why not suggest her "good" readings, try to get her involved in your rituals or preiers (if any, and if possible), try to share your knowledge with her before resorting to more drastic methods?
Sometimes this "negativeness" is just a phase of adolescence.
Maybe you can do this journey togheter..
This is just a stranger's suggestion, consider it as you wish.
Hope you find a solution to your worries =)