Whatever number of children you and your DH feel is right for your family is the right number - whether that is one or ten. I don't accept the argument that children have better, happier lives when raised with a sibling. I have a sibling and we have never, ever got on - we don't talk at all now and haven't for many years. I would have loved to have been an only child growing up. My DH is one of four and he and his siblings all get on and its lovely now that those siblings have children of their own - lots of kids running around everyone and a close family. Sometimes siblings work, sometimes they don't.