there is nothing wrong with distancing yourself from people who treat you abusively. in fact it could be the only way to get peace with a sibling. stop answering her prying questions, get it in her head that you not interessted in this game. i have a brother who has picked at me about anything you can imagine since we were toddlers. ive always just wanted to get away from him. everyone thinks he’s a swell guy and im the asshole. as we got older he is more tactful but it’s the same old listing out for me all the ways i annoy him or do this or that wrong. its abuse, it comes from some problem they have in their brain needing to dominate someone, anyone. siblings make an easy target, especially if they get used to it and it becomes normal. tell her to shove it