We have DS. He's 9m. We have always wanted just 1 child. And we've been together 11.5 years and always stuck to that. I am really getting annoyed and pissed off with the "Oh youll soon be having another/when's the next one coming along" etc. I started saying "oh we dont want another" and people would say "Oh you say that now" And we've been saying it for the past 11.5 years!
WHAT THE HELL IS WRONG WITH 1 CHILD?! Does that make us a dysfunctional family. Fuck off! 
I now flummox people by saying I couldnt have another child as I love DS too much and wouldnt be able to love another child enough. They often look uncomfortable and drop the conversation....
But seriously. Why is there an assumption that once you've had one child, that is simply not enough?! And why is it public property and opinion that you must have another?! GRRRR