My MIL remained friends with my fiancé’s high school ex girlfriend and her family. We do not share the same affection for them. They are not nice to us— not so much as an extended congratulations on our engagement. But she is now insisting they be invited to the wedding. The ex, her sister, their mom and grandma. I don’t know them. My fiancé doesn’t want them there either. We’ve told her 3 times already that we are uncomfortable with it. The last time he talked to her about it, she threw a fit and got hysterical and threatened to not come to the wedding.
She isn’t paying for the venue/catering. She honestly doesn’t see why we are super uncomfortable at the thought of having them at OUR wedding. How do I get her to understand this not going to happen???