SUBREDDIT: r/relationships
TITLE: How do you all address your in-laws? Is my situation (24F) unusual?
POST: My husband (25M) and I have been together for 6 years.  We got married a year ago.  For what it's worth, we live pretty far away from both sets of in-laws and only see them a couple times a year (usually holidays).  We're in Indiana, my parents are in North Carolina, and his are in Missouri.

Ever since my husband and I were dating I've called his parents "Mr. and Mrs. Lastname".  This hasn't changed.  My friends find it odd that I call them this, but to be honest they've never asked me to call them anything else.  I think it's because I don't know them very well, but part of me wonders if it'll always be like this.

My husband tends to not use names when addressing people.  I don't think he's ever called my parents anything, and he admits he wouldn't know how to address them.
TL;DR: 
Is this weird?  Should I bring it up or is it normal that my in-laws are still "Mr. and Mrs. Lastname" after 6 years and a wedding?