Throwaway account and I've never done this before. I'm more than willing to clarify anything or take the heat if i'm wrong! I (21F) am engaged to my fiancée (21M). We’ve been together since our first year of college and are planning our wedding for next spring. My older brother (28M) has been dating his girlfriend "Sally" (27F) for about a year and a half. We’ve never really been close, but I’ve always been polite because I know he likes her a lot. Everything blew up at a family dinner last week when me and my fiancée were talking about wedding planning and how stressful it’s been, and my brother’s girlfriend kind of laughed and said something about how if we don't work out at least we'll get cute photos for instagram out of it. I just stared at her because wtf? Then she added how she doesn't get why we even need to get married so young when we "barely know who we are yet" and we should give it two more years. Me and my fiancée have been dating for three years, our wedding isn't for another six months, and yeah, maybe we're young but he's the most important person in my life. Not to mention my fiancée was right THERE. He went quiet and I felt completely humiliated. Later that night I texted Sally saying she crossed a line and I don’t want her at my wedding if she’s going to say things like that about me and my fiancée. My brother blew up my phone saying I’m overreacting, that she was just being honest, and that I’m ruining the family dynamic by "banning” her. Now my parents are split. my mom thinks I’m right to set boundaries, but my dad says excluding her will cause drama that overshadows the whole wedding. So now I’m stuck. My fiancée says he’ll support me either way, but I can tell he feels awkward about the whole thing. He's also pretty introverted and he's the type to make others feel comfortable while neglecting himself, which I don't want him to feel like he has to do that for our own wedding. AITA for telling my brother’s fiancée she’s not welcome after the things she said? edit: just now realizing I titled it my brothers fiancee LMAO. sorry guys I got confused with the titles after talking about mine vs my brothers girlfriend. they're not engaged, just dating. sorry for the typo!