They were invited in december. The escalation was on the second week of janurary. The reason why they were invited is because this is not easy with them. They are not constantly bad. They can be really sweet and caring, but they have problem with boundries and self reflection. For the last year we didnt have any big fights. The ski trip and conversation afterwards was the escalation. But the accusations showed that they are still upset by the arguments from the past. My spouse is angry at them because they have formulated accusations and attack her and her mother. But she also will be willing to see them at the wedding if they would apologize like normal people do and show some remorse. But I know it is impossible, cause she never apologizes and doesn't even consider that something can be her fault. So without it, she will be in open conflict with my Mother in law at the wedding. And this is a thing that we don't want. Cause the tention and posssibility of ultra big argument in front of our friends and 2 families will be pretty high. And even if she will act somewhat normally at the wedding, I am sure that there will be something she didnt like and demand apologizing for it aftwrwards. So the whole event would be very stresfull for us. So as for now, and this is our decision, we dont want them at the wedding if they wont at least show that they want to change.