Okay, so my brother (M16) and I (F16) are twins that go to the same high school and are in the same grade. We live together (obviously) and there’s this neighborhood girl that had/has a big crush on him. She was really strange and bitchy and would hit on him in front of her boyfriend which I found both amusing and immensely weird. 

My brother seemed to be into her for a little bit, but then got weirded out after hanging out with her and the bf one time. After he stared keeping his distance, she would just come up and start touching his hair (making him visibly uncomfortable) and sometimes I’d step in to tell her to back off. 

Recently, we were visiting some cousins in Ohio and one of them asked if either of us were dating anyone. I, with a very, very joking tone said “ooooooh [weird girl’s name]” and poked my brother playfully. He flipped his shit. He started yelling at me in front of our cousins about how he hated her and how much of a freak she was. Then he just flat out started insulting me about random shit that was unrelated. 

It was really embarrassing. I quietly told him to calm down, but he wouldn’t budge. He was pissed at me for the rest of the night, so I’d clearly touched a nerve. 

Was I the asshole for bringing it up when I didn’t know it would bother him that much? Literally moments before he’d been teasing me about my bf so I thought it was all fun and games :\.