I can see why you'd want to have one.... even if I couldn't, who cares? It's your decision. I don't think you're selfish - you're making a choice.

My original choice was to have no children at all. My DH and I were married for years when I suddenly convinced him that we would be missing out on something if we didn't have any children. We weren't even trying, but if we ended up with one - great!! (Clock was ticking, you see).

I love DS more than I could even imagine and my attitude to children has changed dramatically. I am no where near as blaze. We are having a second so that DS has a brother or sister and so that we can have one more child to love as much as we DS - that's it. No more children after this. That is why I changed my mind - it's dramatic. NO CHILDREN to two. I guess I got addicted after the first.

That is my decision and as legitimate as your decision. Don't let anyone make you feel bad about it - they'll all be dead and gone and you'll be happy that you stuck to your guns.