Wow, apparently the other free food being offered was not enough. Nope, this entitled lady needed to have that lamb for free. Just reading through this exchange, one can pick up a feeling of hopelessness when it comes to reasoning with these kinds of people.
It's as if they've unconsciously devoted their time toward looking for a problem, wherever they can create one in the world. And when they're met with acts of genuine helpfulness, they skim right over it, to make noise where no noise need be made. Oh well.