You choose with your husband what you want to do about it. I wasn't going to let it slide with my daughter.

She's always preferred me from birth. Ie. it was apparent from the get-go. But I've always made it a point that her father also loves her and MUST NOT be treated badly. When she was a few months old, I'd have my husband take her as much as possible so she could get used to the way he smelled and the way he held her.

Then as she got older, when she says disparaging things to her Dad, I always immediately say, "that's not nice" or "hey, none of that"and make her apologize - "I'm sorry" from the time she could say it and understand that you say "sorry" when you hurt someone, physically or emotionally. I mildly roared at her just to make sure she knew I was serious about it. Even my husband thought I was being too hard on her, but I insisted.

From the time she began talking, her bedtime routine has always ended with "good night Daddy; I love you, ugga-mugga" and give him a hug just before getting tucked in.

And I've always let them have their time together, the more things they did together, the better. It could be messy, it might not be the most productive thing for them to do together, it might not involve learning, it might not be the way I would play with her, but as long as the two of them are having fun.