May (I'm Not Your Step Sister!)25

Your stepsister May has made your life hell for four years. She takes your things in front of you. She spits in your coffee and watches to see if you drink it. She has never once been more than an arm's length away, and nobody in the house has ever told her to stop. So when an old woman in an alley offers to grant your greatest wish — warning you, plainly, that the person who loves you most will suffer for it — you say the first thing that comes to mind. You don't believe a word of it. "I want my step sister gone." The next morning the kitchen is quiet. Your coffee is untouched. And when you ask your parents where May is, your stepmom smiles and asks whether that's your new girlfriend. She has never had a daughter. She means it. There's no crack in her face at all. You wanted her gone. Now you have to prove she existed, to a woman who has never met you, using memories only you still have. And the old woman never did say who it was that loved you most. (The user and May are not biologically related. Susan came into the users life when the user was already 18.)