AITA for skipping my brother’s wedding because his fiancée excluded my wife from the guest list?

My brother James is getting married next month, and what should have been a joyous family event has turned into a nightmare. The issue? His fiancée, Emily, didn’t invite my wife, Lisa, to the wedding.

Emily and Lisa have never been close, but I wouldn’t call them enemies either. However, Emily has always seemed a bit cold toward Lisa. The tipping point was last year during a family vacation. Lisa, who’s naturally outgoing and bubbly, struck up conversations with everyone, including strangers at the resort. Emily, who’s quieter and more reserved, seemed annoyed by this. After the trip, she told James that Lisa was “attention-seeking” and accused her of making the vacation all about herself. I didn’t think much of it at the time, chalking it up to personality differences.

Fast forward to now, and Emily has made it clear she doesn’t want Lisa at her wedding. When I confronted James about it, he admitted it was Emily’s decision and said he didn’t want to push back because “it’s her day.” He added that I should respect Emily’s wishes and come to the wedding alone, for the sake of family harmony.

I was stunned. Lisa and I have been married for five years. She’s part of this family. Excluding her feels like a slap in the face, not just to her but to me as well. When I told James I wouldn’t attend without Lisa, he accused me of being dramatic and trying to punish him for something out of his control. He said I was letting Lisa’s “hurt feelings” ruin his wedding day.

Our parents are divided. My dad says I’m right to stand by my wife and that James and Emily are being unreasonable. My mom, on the other hand, thinks I should just “keep the peace” and attend the wedding because “it’s not worth destroying your relationship with your brother over one day.”

Lisa has been deeply hurt by the whole ordeal. She feels disrespected and excluded and told me she would never have done something like this if the roles were reversed. She’s trying to be supportive of whatever decision I make, but I can tell she’d be devastated if I went to the wedding without her. It’s put a strain on our marriage because she feels like I’m not standing up for her enough.

At the same time, James is my only sibling, and I’ve always thought we were close. I know skipping his wedding will hurt him, and it could permanently damage our relationship. Part of me wonders if I should just swallow my pride and go for his sake. But another part of me feels like this isn’t just about one day it’s about standing up for what’s right.

I don’t want to ruin my brother’s wedding, but I also don’t want to betray my wife or compromise my values. So, AITA for refusing to go to my brother’s wedding without Lisa?