Juvenile Mommy

As I'm putting children to bed this is the conversation we have.
Amy: "Mommy, Aunty Ruthie is OLD, did she have a husband before Uncle Joe?"
Me: "No! Uncle Joe is Aunty Ruthie's FIRST husband. Aunty Ruthie is MUCH younger than mommy, that's why she didn't get married until recently."
Silence for a few minutes.
Amy: "Mommy, how come some mommies look like children?"
Me: "What do you mean?"
Amy: "Well, some mommies look really young like children, how can they be mommies?"
Me: "Are you referring to the fact that mommy looks young?"
Amy: "Mommy, you look like a KID, how can you be a mommy? You look like you are only seven-years-old!"
Me: speechless....