When did your LO stop calling you mummy/daddy and start calling you mum/dad?
Did it sound strange?
My oldest DS is 10 and we are still mummy & daddy, however when he talks about us to family members/friends he calls us mum & dad.
Like when I talk to him and say (for example) - "go and ask daddy" "have you spoken to daddy about this" etc etc
It seems so strange to say dad 🤣