Mine have both been through stages of choosing one of us over the other. DD2 has always been very much "mine", but every now and then we get short periods when she wants Daddy to do whatever. DD1 has always been a bit of a daddy's girl, but probably around the age of 2 she did a backflip and only wanted me to do everything for/with her. WIth the two of them it got so hard that we started the phrase "got to share the Mummy".

It will pass, and you're not a bad mum for wanting her to go to her dad sometimes too (or if you are, then I'm a REALLY bad mum!). Its tiring being a one stop shop for all your child's needs, and frustrating when there's a perfectly willing and loving pair of hands to help that are rejected.