I got finally old enough to get a part time job. I was really looking forward to it and I even got one. It obviously isn't a thing I would like to stick to for my entire life, but I still love it.
I would love to become a doctor one day. My younger sister, though, doesn't think I'm able to achieve it. (Please note that she was 12 and I was 15 at the time)
One day when I was talking about my part time job and school, she told me to stop trying both at school and work since I'll end up making fries in McDonald's anyways (no offence to McDonald's workers, that was just what my sister said). So I told her that, unlike her, I at least do have a job. Our parents heard it and got furious at me since she's too young to even get a job. I tried to explain to them that I was just defending myself, but they wouldn't listen and would yell at me and urge me to apologize to her. I did not.
AITA for not apologizing to her and not regretting what I said?