Another gorgeous baby is coming into the world, everyone will be happy about that!! How could you not be?
Sure, you might get some surprised looks and 'why?' questions but just remember that's because people will be surprised, not because of judgement because you've been telling them there's no more on the way!
Just make sure when you announce it you say how thrilled you are (rather than looking nervous waiting for their reaction) and people will be just as happy!!!!
A very exciting time myson, congratulations!!!!