I have 2- Pixie who is 7 and Peri, the newborn.
I also have a nephew who is 11 months older than Pixie that I am very close to and would like to be available for should he ever need me- either as a parent or financially. His father is not in the picture and his mother is not the most stable (emotionally or financially) and there may come a time when I need to be a bigger part of his life than I currently am, and that would be fine with me.
I always wanted a house full of kids, but I separated from my first husband I was still pregnant with Pix, and of course, didn't have any more children until Peri. If we ever want more, I think it will be via adoption, and I would adopt a child who was older, or at least at an age between the 2 girls ages.