The backstory: The boy has returned from spending a few hours with his other mom. As he arrives home, he announces that he's had dessert already. Then, not 20 minutes later, he asks for more dessert.
Mama: I thought you said that you'd already had some dessert.
JT: I did already have dessert.
Mama: Then why did you just ask me for dessert?
JT: Awww, sweetness, there's no law that says a boy can't have two desserts.
You might be able to say no to that kind of charm. If so, you're a stronger woman than me.