My kids have a weekly playdate with her kids - our nannies used to do it together, and I just kept doing it with their nanny when I quit work. So her daughter (who is 4) told me about the babies that are coming, but her nanny said she isn't telling people yet. I totally understand this. But still. Awk-ward. I really hope she starts telling people soon.
Also, holy crap, twins. She works a LOT. She must be freaking out.