A few months ago my father and SIL had a bit of a heated argument. SIL always talks down about my brother (in front of him) and my father had enough and told her he’s fed up of it and the way she speaks about him. My brother is such a gentle person who gets walked over so easily, unfortunately he seems to go for women who take advantage of this.
Since the argument, they haven’t seen each other and she will refuse to go to my parents house to collect her child even when my parents babysit their daughter 1 day per week
My wedding is coming up soon and it’s very small, less than 20 people. Would IBU to tell her if she can’t make an effort then don’t bother coming? I’m worried my brother will decide not to go if she doesn’t and I would be absolutely gutted 