Three: I think that it's a really personal thing. It seems like not only your daughter had this dream of a sister, but you also have it for her. And really, like the others said...if DH is on board, you can handle it being another boy, and you have the money...DO IT! I don't believe I have ever heard someone say they regret having a child, but I have heard those who regret NOT having another child.
But do really evaluate how you would feel if the next was a boy as well. Like where your "stop" line is. We always knew our "stop line" was four kids. No matter if they were four boys, four girls, two of each, three and one, etc. And ME, we won't be swaying for our fourth. I truly will be 110% happy with either sex. Because when I saw our family before we knew what any of our children would be, my only desire was that I got one of each sex. I dont mind having one daughter and three sons. If that is what we end up with. I would have struggled if I had four of a kind, but would have found a way to make peace with it. But I think it's easy for me because I grew up without sisters and never missed it at all. I love being my moms only daughter. I love watching my brothers grow up as best friends. So my answer is obviously not your answer. Mine is no, we would be stopping if it was the number we decided on and even if I had to come to terms with what I had and wasn't going to have. But ours is money, space, emotional ability to stay connected to each child and not lose my mind, and a host of factors that we considered when picking our number. BUT, it sounds like your decision is more fluid and it does sound like you are willing to take the risk of having another boy to give your daughter a sister. And if DH is willing as well...I see it being a total go for you guys :)
