Hi ladies!
I'm sure this has been asked before and a lot of you have probably dealt with it, so I'd love to hear your thoughts. Sorry, it's a bit long....
I have no idea how to address my future in-laws. My fiance has a long last name, so I've always called them Mr. and Mrs. "X". When my fiance talks to me about them, he'll call them Mom and Dad, i.e. "Dad finally saw that movie and really liked it." And, I know from talking with my FMIL that she'd want "Mom" and thinks it's weird (and somewhat disrespectful) that her son-in-law doesn't call her that.
Now on to my side of the family. My mom is extremely sensitive about this. My sister is married and calls her MIL Mom. At a family gathering, my sister said something like "Can you hand me that Mom?" My mom responded, and my sister said "No, other Mom". I guarantee she's still upset to this day and talks about how SHE was the one who gave birth and took care of her all her life. My dad passed away a few years ago.
Personally, I don't feel comfortable with it but don't want to be rude. What to do?