Hi, Britedark! I'm sorry you're in such a difficult position. Interestingly, my older sister and I have the same age gap and almost the same ages. I cannot imagine things not going well between us, so I understand why it's impossible to push her away. I agree with RoxanneToto that you aren't overreacting. I don't know if it's possible for both of you sort it out with a therapist. I hope you won't be too stressed when she comes tomorrow.