It's always a sales pitch with this women with guilt and lies. Your gran is in severe pain so it would cheer her up if you did xyz. It could be your grans last Christmas, birthday so you have to visit on the exact day we want (boxing day isn't good enough). She has even faked having Multiple sclerosis for a few months in the past. Her latest gem is if we don't allow bil who has depression to visit we could really set him back with his depression/ tip him over the edge. Why can't she just ask like a normal person and except no for an answer and that some days are not convenient etc.