Features an audio read-along! To Mr. and Mrs. Watson, Mercy is not just a pig â sheâs a porcine wonder. And to the good-natured Mercy, the Watsons are an excellent source of buttered toast, not to mention that buttery-toasty feeling she gets when she snuggles into bed with them. This is not, however, so good for the Watsonsâ bed. BOOM! CRACK!