Where babies come from

Today, while we were having our daily playtime of princesses and castles, Abby says to me:

"Mom, do you know that I used to live inside your belly?"

"Yes," I say with a sense of dread slowly creeping up inside of me.

"Yup,"  she says.  "And then you just pooped me out!  Like this...(Abby blows a raspberry)."

I laugh, of course.

She sighs.  "Mom, you have one girl and three brothers."

"You're right,"  I say.

"And they used to live inside your belly too.  And then you pooped each of them out!  Poop, poop, poop!"

I'm dying now.  Laughing with tears coming out of my eyes.

She sighs again. "Mom, I wish I had a sister.  Could you poop one out for me?"

Oh dear.