Back in 2019, my SIL's husband announced that he wanted a divorce. They had been married for 7 years.
Ex-BIL had a very good job, they had a lovely house and SIL didn't need to work etc. They sold the house, divorced and he has moved on and has bought a new home.
SIL is currently living with in-laws and despite the break up being nearly 3 years ago now, she is completely depressed and negative about absolutely everything. Christmas we invited the in-laws to come and spend it with us and SIL joined them. It was a depressing Christmas with SIL announcing at every opportunity that everybody had a much better life than her and she had nothing to look forward to. She moaned about living with in-laws. She got a huge amount of money from the divorce settlement and she could easily buy a home, yet makes every excuse as to why she's not yet found one. She has also found a job for 2 days a week, has around the clock childcare, doesn't have to worry about school runs etc, needing a babysitter so she can go out, which is lots.
3 years on I am fed up of having to walk on eggshells around her. Everybody is poor X and she has had a tough time. Yes, I get that, but it's been 3 years and anybody else in the family who is going through a tough time is told by the in-laws to get a grip. I had a very close family bereavement last year and after a couple of months was essentially told by the in-laws that I needed to put it into perspective (I do have a bit of negative relationship with them due to comments that have been made in the past).
They want to come and stay with us again at Easter with SIL and her DC, but after Christmas I just don't want to have to put up with all of the negativity that SIL brings. I have tried to be supportive, I have reached out, I have sat with her for hours and hours listening etc. AIBU??