SIL "Joked" About Preferring My Fiancé's Ex Over Me As Her Bridesmaid, & Was Shocked I Quit... AITA

So last weekend it was my sister in law's wedding. My sister-in-law is my fiancé's sister to clarify.

I've been with my fiancé for 5 years and we've been engaged for two. Before I got with my fiancé, his family was trying to get him to date another female friend of his, who he no longer talks to because she's said some pretty horrible things about him and some of his friends. Plus, she was always trying to put me in my place since I started dating my fiancé, claiming she'll always come first in his life. Long story short, stuff happened and they no longer talk.

I have a pretty close relationship with his family, especially his two siblings, his sister (the bride) and his brother.

One day before the wedding, we were having a family lunch with the bride’s family, and during lunch she started mentioning that female ex friend of my fiancé. She started saying what a gorgeous girl she is and how pretty she is. My fiancé and I felt uncomfortable, and my fiancé was pretty pissed because that ex friend has caused a lot of damage in my fiancé's life in the past, so it was hurtful for him to hear his sister praising her like that, but he stayed silent since he didn't want to cause drama during the wedding period.

The nail in the coffin was when my SIL said that it's a shame my fiancé never got to date (female ex friend) since I came along and took her place, because she'd love to have her as a bridesmaid, but because of me she can't and she can't even call her a sister because of me.

Story 1:
AITA for stepping down as a bridesmaid just one day before the wedding?
Story 2:
AITA for telling my cousin my best friend slept with her fiancé while we were on vacation
Story 3:
AITA for walking out in the middle of my boyfriend's birthday party?
Story 4:
AITA for refusing to talk to my son and husband until they apologize to my MIL?

#AITA #Relationships #Family