Hi! My feeling is that if you're comfortable with witch-themed stuff, you'll be ok with the content of the game. The closest thing to a possible line-crossing piece of content is partway through the game you uncover something scary in the basement, which might be (paraphrasing slightly from the rulebook):
1. A giant eyeball
2. Tentacles
3. The Fairy Queen
4. A Werewolf
5. A servant of the Great Old Ones.
6. The demon Azathoth.
...that's the scariest and least kid-appropriate page in the game, so if you're ok with the above, I think you're golden.