When my 12 year old was a baby I adamantly thought to myself, I want her to call me Mama, not Mommy or Mom or definitely not Ma. So I religiously referred to myself as Mama. "Come to Mama." "Mama loves you". And it worked.....for a number of years. I noted when she was 8 or 9, she still was calling me "Mama" and it warmed my heart.
But somehow since then, the overwhelming cultural term of "Mom" has cleared away all of my efforts, and that is what she calls me. "Mom, I need some money". Mom, I need a ride". "Mom...." And of course her younger siblings have naturally followed suit, even to the point where my 4 year old who SHOULD still be calling me "Mama" says "Mom" also. "Mom, I love you ."
Now that I think about it, "Mom" sounds pretty nice too. What was I ever worried about?