Brother is my father?

I will most likely delete this later, I just need to vent. My oldest brother is 30 years old and still living at home. He wasn’t raised by my mother, he was raised by my aunt who made him believe that she was his mother. She never told him the truth. That was not supposed to be a permanent living condition. My mother had left the country to get a visa and planned on bringing him to the states. When my mom had traveled down to get him, he had no idea who she was. Till this day, he has never called her “mom”, only by her first name. My mom did send money and gifts to him and my aunt monthly for caring for him and my aunt pretended that all of it was from her. Anyways, because of this, she has spoiled my brother to try and win him over. She let him grow up as a father figure to us which is disgusting honestly. He was a young teenager when it all started.

He would slap me in my face for sucking my thumb when I was 4.

When he was 13, he’d beat us with a belt for being “bad”.

I was basically his servant. Had to take off his shoes, socks, bring him his slippers, get him (and his guests) drinks whenever he called. When I said no he would hit me.

He’s always in my business acting like he has a say in what I do. Acting like he’s my father. When I started to wear bras, he told my mother that I didn’t have breasts and I shouldn’t be wearing bras. He told me to take it off.

I’m 19 and when I leave the house or when he comes home and I’m not there, he calls my mom and asks a bunch of questions about where I am.

I constantly have to remind my mother that he’s not my father and that he should act more like a brother (half brother at that) and she’d say “he’s better than your real father”.

When I go out with my fiancé, she lies to him saying that I’m with my cousin and gives me a curfew to corroborate her lie. He’s the son. She shouldn’t have to explain shit to him.

Whenever I want to do something, she basically has to either have his blessing, or allow me to do it but behind his back. HE’S NOT YOUR HUSBAND.

He even calls her “daddy’s baby” 🤮 and sometimes they REALLY need to put more distance between each other. They can damn near kiss, that’s how close they are.

I am working on moving out with my fiancé (which according to her, he doesn’t even know that I have a boyfriend, much less that I’m engaged and she’d love it to stay that way). I’m leaving here as soon as I can and I’m never looking back.