If pregnancy is in the water, I'll pass, or will I?

Having two children is enough right? Then why do I have a pit in my stomach telling me three may be the right number? I'm not getting any younger and I have no idea why I want to be outnumbered...but I can't help but think, maybe, just maybe another one would be great. Hmmmmm. Ain't gonna happen soon and maybe I'll talk myself out of it, but it's a hard question to answer.