All in the car on the way home:
A: Mommy, why isn't X married?
V: Because she didn't meet someone she wants to marry yet.
A: But when you meet someone you should ask "What is your name?" first, then you can ask them to marry you.
. . .
A: Mommy, do you know what I'm going to be when I grow up?
V: What's that?
A: A Mommy!
V: Wow, that's a great job! I love being your mommy!
A: Yeah, but you're probably going to die before I do.
A: Mommy where are you going to live when I grow up?
V: What do you mean? Am I going to live in the same house?
A: I mean where will you sleep? Because I thought I was going to sleep in your room when I grow up.