You need to spend some time with your daddy.
Or, one of her sons would call and after their visit, she would say:
Now you need to talk to your daddy.
My mother and her sisters called their fathers (Wild Bill and Pa) "Daddy" until their dying day.
"Mommy" doesn't stick around as long. It changes to Mom, Mama, Mother, etc. Why is that? I remember the year I stopped being Mommy. I became Mom. I can promise you that my mother remembers this transition in her life.
I don't call my father "Daddy." But thanks to the southern influence in my life, "Dad" has multiple syllables so it sort of comes out the same way.