We have a DD, 18 months old, and are now at the stage when people seem to think it's ok to ask us if we're having sex ("so, are you trying for another yet.....?") We are really happy with our gorgeous girl. In fact, we feel no need to have any more children. But I'm worried that I may be in some way disadvantaging my little girl. I'm worried that in 5 years time, I will discover that she should have a sibling. What are the benefits to only having one child? What are the disadvanatges? is it ok to only have 1? Please help!!!!!