When me and Dustin first got together, I tended not to refer to them if I could. His dad would have laughed at me if I called them Mr. or Mrs. Colbert. I'm pretty sure his mom would have had a fit. (She hated her MIL) I didn't feel comfortable calling them by their names.

After being considered part of their family (I was taken in almost immediately) for eight years. If talking to them directly it's Momma Pam and Daddy Dave. If I'm talking to someone else it's Pam and Dave.

Dustin never really have that "what to call them" phase. It went from "Hey you" the first few months to Momma Kat and Twig (Dad's nickname - long story. Might as well be considered his first name).

What I find really funny is he has always called my G-ma Grandma and the same with his grandparents and me. It's always been Nonnie and Grandma Peggy and Poppa Glen.