As we are starting to finalize our guest list we have ran into a bit of a sticky situation...
My FI and I have been together off and on since highschool, with a one year breakup that involved a crazy, 4 month engagement between him and another girl. That obviously didn't work out, but the problem is, her mother is his mother's best friend, and has been for 25 years. My FMIL mentioned possibly inviting the mother, but I don't know how comfortable I am with the situation (the ex fiance is crazy...like so crazy if she saw the invite to her parents she would show up and do something nuts probably). I also am not very fond of the mother, and feel like it would just be weird to invite her, but I also think it might be rude to not invite her since she is best friends with my FMIL still.
What should we do??