The Copying Game. The Copying Game

I suppose there comes a time in every child's life when he is temporarily enamored of the copying game. Unfortunately, that time in Marty's life began about a month ago and seems to be without end. Example:

Mommy: Marty, did you finish your dinner?
Marty: Marty, did you finish your dinner? Hahahahahaha!!!!!!!!!

Mommy: Marty, if you don't eat your dinner, you can't have a treat.
Marty: Marty, if you don't finish your dinner, you can't have a treat. Hahahahaha!!!!

Mommy (smiling and shrugging): ...
Marty: Mom?

Mommy: Yes, Marty
Marty: You're supposed to say "Mom"

Marty: Mom?
Mommy: Mom?

Marty: HAHAHAHAHAHAHA!!!!!!!

Marty: Mom?
Mommy: Mom?

Marty: Mommy, if you stop copying me, I'll stop copying you.
Mommy: Okay Marty, please eat your dinner so you can have a treat.

Marty: Okay Marty, please eat your dinner so you can have a treat. HAHAHAHAHAHAHAHA!!!!!!!!!!!!HAHAHAHAHAHAHAHA!!!!!!!!!!!!
HAHAHAHAHAHAHAHA!!!!!!!!!!!!HAHAHAHAHAHAHAHA!!!!!!!!!!!!