Hi there, Our DS will be 3 in November and out of the blue yesterday asked for a sister!!! No idea where that came from!
The thing is we wanted a child so much and had to go through a lot to have him I have always felt very privileged and lucky to have him and have never thought of having another, as I didn't want to push my luck 
But I worry that he will miss out with not having any siblings; he's a VERY confident and very friendly child, I have friends who were only children and they said they loved it, but I still feel a little guilty and torn.
So what are the pros and cons of having only one?