My (21f) sister (24f) recently expressed that she wants me to talk to my boss to see if there would be a possibility for a position at my job for her. She's looking for a temp job that involves some creativity in the field that she's studying in. My problem mostly stems from the fact that she believes that she is entitled to this possible position because she got me my first job at her workplace (a fast-food place), and then originally encouraged me to email my current work about a position. She says that because she did these things for me, that I should do something for her. I told her that just because she did those things does not mean that I owe her - I have never thought this and she has never brought up anything like this before. She said that she felt offended and hurt that I expressed a boundary that I did not want to work with her. We live together and if I did see if there would be a position for her, I would be one of her higher-ups. My last main gripe with this situation is that I want my independence from my family, and this job has allowed me to do so. I have climbed the ladder myself and have made a name for myself within my workplace. It feels good to have something that I can call my own and have my own work friends and my own workspace. So, WIBTA if I put my foot down on this boundary?