Quoting jess m401:" She was bragging, saying "oh there's only one Nana" so I told her how my daughter calls my grandmother ... [snip!] ... see her I'm all disgusted. I even talked to DD how we don't play favorites with family mambers. Would this piss u off too?"
Yeah, that would bug me. My MIL kind of does the same smurf though.
My kids call my MIL "Gram" and my mom "Grammy" But sometimes they will slip and call MIL Grammy and she always corrects them. "What did you call me? I'm not Grammy, I'm Gram." blah blah blah.
Like seriously lady, chill.