A baby?

So tonight, I picked up the girls from my mom's house, and on our drive home this is how our conversation went:

Sarah: Mom, how do you decide to have a baby when you grow up?

Me: Well, you grow up, get married, and you decide with your husband whether you want to have a baby or not. Then you pray to God about it, and if God wants you to have a baby, He will bless you with one."

(silence...thinking...)

Sarah: "What happens if you decide you don't want to have a baby, but then you get a baby anyway."

Me: Ummmmm.......Wellll.........Ummmm........

Change of subject.