No one sensible would help you do that. You could kill yourself and it would be much worse for your husband then ... tell them you have a gallbladder issue, a stomach issue (which is not too far from the truth, since these do not function for you now) and, really don't go, or just have water. Tell you are going to be very sick if you ate, which is 100% too. ... or reschedule, or to the movies/museum/along those lines instead, with them ... Really, don't kill yourself! Even a good boss is not worth-ed doing that for him ! ...