Why not three?

Here's a conversation I had with Sydney while we were driving home from school. Hollis and I were talking about this after the kids were in bed. Not sure how I could've played it better. Let me know if you have ideas! Hollis thought maybe this is when the stork saves the day. But I think that would only create more questions. She's a bit too young to learn the truth. Especially when boys in her class are running around calling their penis a "googley."

Syd: Why can't we have three babies, mommy?
Me: What do you mean? You mean you want to invite more friends for Julia to play with at your birthday party?
Syd: No, I mean three kids in our family. I want a baby brother.
Me: Oh. Well, Sydney, I just don't think that's going to happen.
Syd: Why not? Other families have three. Why can't we?
Me: That's just the way it is, Sydney. Some families have no babies, some have 1, some have 2 like us and some have more.
Syd: (Thinking quietely) But how do mommies get babies in their bellies?
Me: (mind racing) Well, I think it just happens to some mommies. Some are more lucky than others. (yeah, that's the ticket. yay, ginny!)
Syd: But mommy, how do the babies get inside? Is it because they eat too much?
Me: (in a full panic, but luckily I remembered a line that teachers use at daycare) Mommies get what they get and they don't throw a fit.

And that seemed to settle things for Syd... for now!