Little bit of history - I have a large number of siblings, we're all very close (emotionally, not in distance).
One of my brothers married a girl from about 90 miles away and when they married, he moved to her home town.
She has one sister and one brother and always said she hates the fact that we get together to celebrate stuff, ie: christenings, big birthdays.
Bro usually comes to events like this on his own, but when they've both got to attend something (ie: weddings) they either stay with me or with my sister who lives about a mile away from me.
Anyway, bro was celebrating a big birthday recently, and we were planning a short visit, give a gift (which we all contributed towards) and leave. SIL told my sister she would prefer it if we didn't go to her house, as she felt there were too many of us (fair enough).
So another sister threw him a party at her house - SIL said she didn't want to come, came up with dozens of reasons why she couldn't, but in the end came along with him.
She made a real fuss, saying there was no need for this, it was a lot of nonsense that we all had to make such a big deal of things... understandable and it's her feelings, but it's always been something we do - we never get together often, so doing something for big birthdays gives us a chance to see all the kids together etc..
I understand she probably feels overwhelmed, my dh did at the start too, cos he's just got one sister and he said he felt swamped by so many people.
They are together 10 years so it's not like she's not used to it.
Anyway, she got really drunk, called our family some awful names, said we were all 'wankers' and anyone who married into us were wankers too.. she said we all treat her like dirt (not true and very very hurtful) and she was fed up with us all.
She said some very rude things to my brother about his daughter (who is 4!!) and told my parents that she hated us all.
Now, tomorrow is an annual event that my brother goes to with my husband and other family members - usually his wife stays here with me. I don't want her here, he hasn't text me yet to say whether or not she is coming, so she may not be, but what on earth do I say/do if she decides to come.
She didn't even apologise to any of us, yet called us for all the names under the sun.
I have wondered if she is depressed. The opinions aren't out of character, she has never been one to remain quiet when she can be talking, but she's never insulted us before.
Part of me feels so sorry for her, but another part is really angry that everything I have done for her has been thrown in my face by the name calling.