I NEED ADVICE‼ Ok so ladies me and my future mother in law do not get along she has offended me and…

I NEED ADVICE‼️Ok so ladies me and my future mother in law do not get along she has offended me and her grandchild on multiple occasions without one apology it barely effects me and my fiancé but I'm about to see her for the first time in 3 months and I don't know how to approach her about the way I'm feeling because in the back of my mind I feel like she's to stuck in her ways to ever humble herself and apologize and actually change WHAT SHOULD I DO