Here's how it went.
There was a game of tasting baby food and try to guess what it is. By the look of the guests' faces, it was disgusting. So I filled out my form with what I thought it was (or should be) to make the game more interesting: Veal liver, salami, fish oil, capers, smelly feet, martini with 2 olives.
Then, the guests had to guess the circumference of the moo to be. It wasn't that bad, untill the end when the MIL measured: the moo to be lift up her shirt and put down her pants, revealing her humongous gut for all to see, which was nauseating.
Then she spent 2 hours opening presents, during which me and another cf woman (thank dog I was not alone) played the penis game (replace words in names of movies with "penis": No country for old penises, or Harry Potter and the Chamber of penis) which was highly amusing.
The men who had left to play pool came back, we ate at the buffet, which was worth the trip. There were no kids to put their grubby hands on the food.
Last game: We had to bring a picture of us as a baby (I tried to find one of Damian or of a hissing baby on a ceiling being thrown holy water on it) and we had to play the game of who's that baby? I paired with the other cf girl, then left to have a glasse of wine with the men who had a diverse and more interesting conversation. I also find that being surrounded only with women and their hi-pitched voice gives me headaches. I prefer the graver voice of men.
Towards the end, when we were all in the living room, the MIL asked me when we were having kids. I looked at her, and calmly but firmly said: Never.
All in all, it wasn't that bad. I managed to avoid unpleasant people and all in all was not subjected to bingoes. The most unpleasant one was the future father's cousin who is slightly retarded and can't control the volume of her voice indoors. I felt like beating her sensely every time she opened her pie hole.