<p>Not to belabor the point, but at this point, we’ve moved on from the “how do kids address adults” stage. Yes, growing up my kids’ friends called me Mrs lastname, but in this case, we’re all definitely adults, pretty much family, and it would be very stilted to do otherwise. actually, the young man had trouble with Firstname for a while, though now it’s very comfortable. I always addressed my inlaws by first name, their choice. My H calls my mom “Mom.” Mrs. Garlandsmom, after several decades, would’ve gotten pretty old.</p>