Twin update

We finally know the gender of the twins: female.
So, we are expecting identical twin girls in late May. For those keeping score at home, I'm told that the chance of having identical twins is 1 in 285.
Erika was informed of the news, but responded angrily. She insists that those are not girls in mommy's tummy but babies! I asked her if she is a girl, and she denied that as well. I found that no matter how you finish this sentence: "Erika, are you a ____?" she will emphatically deny it, turn away and become very agitated. I'm not sure what that is, but there you have the psychology of our 3-year-old.