Are you experiencing this situation? What should I do?

I'm a university student and I moved into my own apartment this year, but I feel like my older sister and younger brother can't accept it. Getting back to the point, my sister, who doesn't respect my boundaries and is secretly jealous of me, said to me after welcoming me home from university, "Your face looks chubby." And that day I had tied my hair up, and I'm a thin person, while she used to say that her face looked chubby when she tied her hair up, and I would tell her it suited her, and I always supported her :) Speaking of today, my brother asked me about someone I follow on Instagram, even though it's nobody's business and didn't seem like something anyone was curious about. I told him it wasn't his business either. And guess what? My sister asked me this in the past, about another follower of mine. Of course, I didn't think she was jealous back then, but now we don't talk or communicate. Because I had told him before, since he had pressured me, that my life doesn't concern him. Now it seems like my older sister is the one who made my younger sibling ask the question. I've removed my sibling from my followers because they asked that question. Do you think I should take my sister out too? Because these actions have started to bother me.
Are you experiencing this situation? What should I do?
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