My older sister keeps saying the f slur

It’s making me uncomfortable and makes me feel unsafe around her Whenever she’s angry at my older brother she yells “GET AWAY FROM ME, YOU F” and “SHUT UP YOU FGOT” But then she says she’s a ally and supports me and uses the pronouns I like going by But I don’t think she really does because she makes fun of other trans people and then says “But not you though, you’re alright” What should I do to feel less at ease and more calm whenever she says stuff like that (Sorry if my English isn’t good or it doesn’t make sense)