AITA for telling my extended family how many men (roughly) my sister has slept with after she outed our youngest brother as a virgin?

54,131 points•5,281 comments•submitted by Thunderbear998 to r/AmItheAssholePresented without comment2Presented without comment3Presented without comment5

We had a family dinner this evening. My family has four kids in total: me, my elder sister (29F), younger sister (24F) and youngest brother (22M).

Extended family attended our family dinner. So all of our significant others, our cousins, aunts and uncles etc. During the dinner my elder sister and youngest brother got into a mild disagreement. My sister seemed (at least to me) to be coming across as very aggressive out of frustration and losing said argument. The two of them were too absorbed in their argument to realise the rest of us were getting a bit fed up.

Eventually my sister got really fed up and said “Shut up, I’m not going to argue with a 22 year old virgin.” My brother hadn’t done any personal attacks up until that point, it was completely unprovoked. I think it might have been the alcohol as my sister is a mean drunk.

Anyway, I immediately told my sister to grow up and that she was making an embarrassment of herself. She replied by saying everyone knows he’s a virgin and she didn’t say anything wrong. This annoyed me as my bro definitely has confidence issues and doesn’t need to be made fun of like this.

So I responded by saying how she slept with well over a hundred men while she was in college, and that since everyone in the family knows this it’s not a big deal right? Turns out her husband didn’t know this amazingly, I genuinely assumed he must have known. he left the party angrily saying my sister mislead him about her past.

Family is blaming me for their marital problems. I refuse to accept I did anything wrong. My sister bullied my brother in front of everyone, all I did was give her a taste of her own medicine.