What do you call your significant other's mom/dad?

[dirtboy]

I call them mom or dad, or use their first name. If they expect me to say Mr or Mrs, then I already know I am too low class for their family.

 

[chrissyo4]

My bf and I have been dating for about 2.5 yrs.
I call my bf's mom and dad by Mr and Mrs.


*Edit* I would still call her Mrs so and so. You could just ask your gf. =p That's what I did.