Mine are here, they arrived yesterday. They invited themselves to see DBH on his birthday, needless to say that was not how we had intended to spend the time but they were very insistent. MiL was very well-behaved until the meal last night, when she criticised the choices of meats and seafoods and cheeses in the buffet meal, and in particular the bowl of chocolate toffee eclairs which are DBH's favourite sweet and were put there as a joke.
She felt that the meal should have consisted of her own favourites. I tried to remind her that it was DBH's birthday and the foods there were for him, but she kept trying to override my explanation, saying 'he likes lemon bonbons much better!' At which I replied that yes, he had liked lemon bonbons, twenty years ago maybe...
DBH is also a teacher and he flatly refuses to have them anywhere near him in term time, he just gets too tired to cope with it, let alone when the children were small. MiL would say, let me help, but all she did was follow me and get in the way, occasionally carrying something to the dining table. She never finished a task I gave her, she would drift away on spotting something more exciting, so I'm not sure why she ever offered in the first place.
Before anyone gets upset and thinks I am just MiL bashing - my first MiL, with Ex, was just wonderful. I still miss her.
Thank you for giving me the chance to vent, littlepig. 
Now excuse me, I have to listen to the life stories of a whole village of people I have never met. Again. Dashed with a soupcon of her funny turn last year, ending with a day-by-day (literally) account of what she has done over the past few days while they were on holiday - only today this will be accompanied by the dreaded Photos.