"Mommy, I don't love you any more."
"You do too."
"No, I really don't."
"Oh, why do you suppose that is?"
"Because you broke my heart."
"Oh no, how did I do that?"
"Because I love you too much and it broke my heart."
At this I broke into the biggest, most dramatic sobbing I could muster and thankfully garnered laughter and assurances that he was kidding. Whew, that was close.