So my future husbands younger brother has the absolute worst girlfriend ever. She makes my life a living hell and it’s to the point where I’ve had to seek therapy for her because of the rude mean and obnoxious things she says and does to me. She constantly seeks attention especially during events about me and not her. Any time she finds out I am getting any sort of attention she does whatever it takes to make herself the center of attention. They aren’t even married and any time my wedding comes up she interrupts and starts talking about what she’s going to do for HER wedding. She’s just a girlfriend. Only reason she’s even still invited is because if I don’t invite her, my fiancé’s brother won’t come and that would break his and his parents hearts. He’s tried to propose to her multiple times but she always starts a fight with him. I’ve heard talk that she wants and is demanding him to propose to her at my wedding and he’s thinking about it to make her happy. That’s completely unacceptable to me but my fiancé doesn’t want me to come off as a bridezilla and call her out on it. Is there a way to public ally say for all guests that it is unacceptable and not welcome at my wedding for anyone to propose at my wedding and that’s our day, not a set up for them. That will ruin my day if she finds any way to make it about her or I have to sit while they interrupt my day to make it about them like always.