Recently, whenever she puts on a dress, she calls herself a princess. Now, her father and I had talked about not indulging her to have a princess complex, so we never even mention the word princess around her other than when we watch a princess movie. Somewhere along the way, she got it in her head that a dress equals princess, and twirls accordingly. It really is sweet. We don't discourage it, but we also don't encourage it either. We let it play out as it should.
On a different note, I simply adore their relationship. They have a very natural father-daughter relationship that is so different from mine and I love it whenever I get to be a witness to it, which luckily is very often. He really is a very good dad to our girl.