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The original was posted on /r/AmItheAsshole by /u/NoBookkeeper3376 on 2023-08-11 13:33:27.

I (28M) am getting married in three months to my fiancée, Clara (27F). Everything was going smoothly until the issue of my younger brother, Alex (25M), came up.

Alex has been dating Tina (24F) for about a year. Tina, before dating my brother, had a short-lived fling with my best friend, Derek. Derek and Tina ended on bad terms, and Derek confessed to me that Tina had cheated on him during their relationship. Given that Derek is not only my best friend but also my best man, I didn’t want any potential drama or discomfort at the wedding.

So, I made the decision to invite Alex to the wedding, but asked him to come alone, without Tina. I explained my reasons, saying it was to avoid any possible tension. Alex was hurt and said he won’t attend if Tina isn’t welcome.

My family got wind of this and is divided. Some say I’m justified because it’s my day and I should be able to choose who’s there, while others think I’m being judgmental and punishing Tina for a past mistake. I feel like I’m trying to ensure peace on my special day, but I also recognize that I might be denying my brother the chance to share in a significant life event with his partner.

AITA for not inviting Tina based on her past relationship and actions?