If, however, you are not, then either disguise what you are, become a fairy godmother pronto (everyone loves them) or move to another world where they have not heard of fairytales so there are no expectations.
Working on the assumption you are willing to be the bad guy, your options are:-
- You get to double up as a spinning wheel saleswoman, always ready to show the naive and stupidly inquisitive just how sharp the thing is! You also get to vanish quickly. This could be a good choice if you really fancy not just committing the crime but getting away with it too.
- You could become queen but a word to the wise. Don't try and bump off the beautiful stepdaughter. It never works out. If you fancy remaining queen, get the girl married off to some suitable chinless wonder with the right bloodline and send her to a kingdom far, far away. She'll be out of your sight but on a more positive note she might make you a granny in due course. And you can tell her father it is in the girl's best interests (it would be too! She's not at risk of being poisoned by you though it might pay not to tell your better half that). It might also pay to get rid of any irritating talking mirrors you own. That way they can't tell you anything you don't want to hear. You'll be happier for it.
- If you adopt a girl that you would rather like to keep for companionship, then may I suggest you get the hairdresser in regularly for her. Don't let the girl grow her hair long. She won't know when to stop. This way she can't let down her hair for any passing chinless wonder to climb up.
- If you are invited to put on a pair of fetching red shoes, turn this down. They are enchanted and you will dance to your death in them. It also means your intended victim has cottoned on to your little scheme to get rid of her and if you do want to avoid being put to death, which will be your inevitable fate, then the moment you are invited to put the shoes on, pretend to consider the matter, say you want the bathroom or something and get out fast. Don't look back. Just go.
Having a successful career as a fairytale witch means keeping your wits about you at all times. Be prepared to cancel plans. Be flexible. You're more likely to survive then.