So my sister in law children call my mother in law "mama". My husband made it clear in the beginning that he didn't feel comfortable with it and we wouldn't be following the tradition.
Now fast forward 16 months and my dd has started calling me mama as babies do lol.. last night at her house my toddler was walking in the corridor shouting mama and just before she opened the door to come to me I heard mil interrupt my toddler and said "no thats mum, I'm mama, mama mama mama"
She is quite overbearing and will refuse to say "my grandchildren" she will say "my daughter, my child" etc so I think she's refusing to acknowledge she isn't the only mother around?
Aibu to not want this to happen?