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The original was posted on /r/AmItheAsshole by /u/Specific-Hotel-4491 on 2023-09-06 06:58:44.
I30f have a younger brother Mark27 who has been married to his wife Kate27 for 3 years. Early in their marriage mark found out she had cheated on him and they decided to make it work. Then last year, I walked in on her in bed with a coworker while my brother was away on a job. He again decided to make it work.
A few days ago Kate and Mark invited us over for dinner. During the dinner they made an announcement that Kate was pregnant. I immediately pulled my brother to the side and asked him if he was sure it was his. He said yes. Night went on and he must’ve told her I said something, bc she made a scene saying “I’d just like to know why you hear good news and have to turn it negative.” Calling me out infront of everyone. So I simply said “bc he’s my baby brother, and your a known whore.”
We started arguing, she kicked me out. Later that night my brother text me begging to apologize to “keep the peace.” I feel like I started with respect, I pulled my brother away, I didn’t make a scene. She was vindictive. AITA?