Sometimes when Jack wants something we are hesitant to give him, like a treat, Jay wil ask him a hard question they have to answer in order to get it. (it's often unfair... like what is the square root of 36? Although, he's been trained to answer "what is the square root of 16?" since it's his age...) This was the first instance Peach merited her own hard question.
Jay: (as he fills up her milk for her...) "Peach, who do you love more, mommy or daddy?"
well. now we know.