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AITA for telling my brother to stop acting like he’s a victim after his divorce?

(English isn’t my first language so please don’t mind if something sounds off.)

I’m 24F and my brother “Rami” (fake name) is 40M.

We recently had a family gathering,
and Rami came to visit after almost two years It was a big deal for everyone because he’s the oldest brother and also the first grandchild
He came alone without his wife and that’s when he told us they got divorced.

The reason: he cheated on her.

The thing is this is his second marriage and his fourth serious relationship, he cheated in every single one, at this point my family almost expects it whenever he says he broke up or got divorced we already know what probably happened.

Every time he starts a new relationship he promises he’s changed,He says he won’t do it again that this woman is different and all that.

But it always ends the same way.

After the family gathering ended and everyone went home, it was just me my parents and Rami He was sitting with my mom at the dining table talking about the divorce how his ex wife found out how he really tried to stop himself and things like that.

For context my relationship with him has always been very formal because of the age gap and how I was raised, In my family younger sisters are expected to be very respectful and formal with older brothers we were never close. It’s basically just “hi,” “how are you,” and “how’s work.” That’s it.

Then I heard him say to my mom, “I don’t know why this keeps happening every time, I just want a normal happy marriage with the right woman.”

That made me furious, because i got cheated on once by my first love and i know the feeling of getting cheated on and i’m still trying to move on.

So I looked at him and said “maybe if you keep your dick inside your pants you’ll find the woman of your dreams?!”

My mom gasped and my brother widened his eyes and was speechless cuz i never talked to him like that,i run to my room and slapped the door

and it’s been two weeks I’m avoiding my parents and him… mom spoke to me saying she is also mad and won’t talk to me and what i did was so disrespectful and i need to apologize to him in front of every family member the next family gathering, mind you it was only me him and mom when i said that

It felt so unfair hearing him talk like he was just unlucky, when he was the one who cheated every single time and i don’t feel guilty about it ,and I wanted to say more but i was overwhelmed and runaway to my room and cried…

So am i the asshole and i should apologize?.