BUT, it looks like rumors of the Royal Baby's sex may have been a bit premature!
Sandra Cook does ask if she nearly said "my daughter", this is true.
But the most telling part of the video shows that Kate does NOT say the words "We're not telling."
That seems to have been a figment of Miss Cook's imagination.
However, if you listen very closely, she does say that the "son is coming out"! Another clue? LOLz!