What do you want to be when you grow up?

This conversation happened today, in the car, on or way to my parents house. Jocie seems to be drawn to notice constructions sites. So today as we passed the construction of a bridge near my parents house she couldn't help but notice and pointed it out. I know this is silly, but I think she might want to be an architect when she grows up. So I told her..."When you grow up, you can be an architect and build bridges too!"  She loved the idea. Then I asked Naomi (even though I knew the answer... or part of it)

Mom: "What do you want to be when you grow up"
Naomi: "While my husband stays home with the kids, I will be a cupcake maker. I will go to the bakery and make cupcakes for my customers."
Mom: mom's jaw falls to the ground wide open.....then recovers and tries not to laugh ( I wouldn't want to discourage her from following her dreams)....but eventually did break out a little laugh.....and then said "Ok then! That sounds like a great idea!"

Talk about a strong, independent little mentality! Can somebody tell me where she got this idea from?