Am I wrong?

So for the past few months I’ve been taking and picking up my sister from work because her car got stolen because she kept the ignition running . There’s plenty of moments where she could have saved to get her a new car but instead she went on a trip to Cali. I feel she is very irresponsible with her money and I’m fed up with lugging her to work. She doesn’t give me any gas money and I’m done being a taxi. Is it wrong if I refuse to take her to work? I even have to drop my little brother off sometimes and watch him because my mom works and I do as well. I feel like everyone problems are falling off on me and I’m done with it.