My Children Have Faith in My Abilities... or Not

Setting the scene:  My daughter was watching Little House on the Prairie.  Laura was sitting at a table in the sunshine, working on her book.  Here's our conversation from there...

Me:  "Now that's what I want.  To be outside on a warm, sunny day with quiet to write."

Son:  "You want to write a book?"

Me: "I have a book idea in mind."

Son: "So, mom's going to be an author when she gets older."

Me:  "Just think of all the money you could have from it."

Son:  "If it's a good book that is."

Daughter (from out of nowhere):  "Well, maybe everyone will pay extra because she will be so old."
~~~~~
Too Funny.

But what do you say after that?....