Just interested to know if anyone else has this. DD is 18 months old and has been using 'mummy' for ages now. Funny thing is, she refers to both me and dh as 'Mummy'. Her understanding is good so if I ask her where 'daddy' is, she will point to dh, if I ask her where 'Mummy' is, she will point to me and if I ask her where she is, she will point to herself.
However, if dh is coming into the house and I ask her who's coming, she will shout 'Mummy'!! She will also follow both me and dh around the house shouting 'mummy' whenever she wants something.
I'm beginning to wonder whether she will ever say 'daddy' !!