Is it possible that my daughter has already out grown Santa?

I wonder if she hasn't sneeked a peek into our closet where her presents are hiding because she didn't want to have anything to do with the Santa at my work Christmas party. In fact, when Daddy told her she had to be nice to Santa as he might not bring her any presents if she wasn't nice, she replied, "No, I don't want to be nice Santa. Mommy bring Lilith presents", and ran off. Could she have already outgrown Santa at two years old? or am I that bad at hiding presents from her?