I'd definitely say it's a phase hon Your DD would love you to pieces, you're her mummy! I find that DD rabbits on about DH a lot because she only sees him quickly in the morning (if she's awake) and for an hour at the most in the evenings - and weekends. She sees me pretty much all day every day though so I guess I'm a bit boring DD even points at photos of both DH and I and says 'Daddy' at each of them but not mummy although I'm in the photos too!!

I know your DD is a bit younger than mine but I suspect it's something similar. I have no doubt your DD is nuts about her mummy