For some background, my sister has been quite mean to me growing up, verging on bullying.
3 years ago I moved out and lived in my apartment. Since then I have avoided my sister like the plague, eg. not showing up to the events she is in.
Yesterday I came down with the flu and have told my mum to tell her that I won't be able to visit her tomorrow. She accidentally told my sister about my flu and my sister has been texting me to come round my apartment to take care of me. I am adamant not to let her since I am perfectly capable of keeping myself alive.
I feel bad since I think she might have a good intention, but I still believe that she hasn't changed and is concerned that she might steal something from my apartment. (her habit since we were young)