B..
Well, I don't want another. However, when my son was around 6 months I kind of got sad he wasn't an infant. I told myself all the reasons I can't and shouldn't have another baby. Not enough money, Not enough space, terrible pregnancy, feeling overwhelmed with two, etc. I sort of let my head and logic talk my emotions out of something. It really did help
Now, I am 100% sure I don't want another child. Up until I reached that point, it just took telling myself...hey...things are great right now. Enjoy your son, stop thinking about the one you don't have. And, I just enjoyed him and accepted it.