I think I know the answer to this, but just wanted to check before I committed to cancelling.
Her party was meant to be last weekend, but cancelled as DS2 was sick. Rescheduled for today. DH has been very sick for the last couple of days (v unlike him. He never gets ill!) and is still feeling a bit ropey at the arse end.
DD (6) was completely off her food yesterday and complaining of a sore tummy. She's just done a v runny poo. However she does seem completely bright and chirpy.
I need to cancel don't I? 
BTW it would be nine kids partying chez nous.