Bit of background : for about the last SEVEN weeks either dd or ds or I have been off school or work with something, first it was hideous tummy bug for ds and me, then really vicious chest infection for dd (& then me) which had her off school (and consequently me off work looking after her, afdter she'd given it to my mum who started off looking after her). Just as she was on the mend from that, they went up to xp's for the weekend, and he took them to visit friends whom he KNEW had just had a d&V bug, so guess what, dd was then off school another two days with that.
Fast forward ten days and they're back up with XP, due to go out for a christmas lunch at their cousins, with another cousin about to joint them.
I just spoke to XP who said that he's spoken to his sister (whom he has 'issues' with) and she "made lots of excuses that she wasn't coming, saying her dd had been sick, temp etc in the night", then called up 15 minutes later to say they were fine and were coming.
He and his sister don't get on well for lots of reasons, and he was just delighted to report an incident of her lying/being weird. I, however, went ballistic with all the obvious stuff to any normal parent - no way in hell can she come or be anywhere near my kids with a sick bug just before christmas etc. Cue dd phoning up in a very sad voice saying "Mummy are you really stopping *** from coming to the party?" and xp then saying he's sure his sister was lying but it serves her right, she'll have to turn around and go home again because I've put my foot down.
I know the whole thing sounds ridiculous, but I'm actually close to tears feeling like the world's biggest bitch ruining that kid's christmas (she has a pretty crappy life and would have really loved today) but I CAN'T risk any more bugs, right on christmas. It would fuck up christmas for my mum and brother too. AIBU?