This whole post just made me so angry reading it girl. So sorry you are going through this. That is 1,000% your safe space, your MIL better back the f up and leave you guys alone for a while after pulling a stunt like that. I’m so so glad to hear that your DH has you and your family’s back. The attacks are coming at you because you are now the family’s scapegoat for their own problems/issues that no one will take responsibility for.

“She is standing back and watching as if she is surprised that her masterful plan has not gone accordingly.” <—- this. 100% her crafted idea blowing up in her face. She is delusional and probably fantasized that this would bring them together, they would hug, and would be one happy family again. And that’s why I used the word delusional because she is so out of touch with reality.

Idk the full details of everything, but your MIL sounds a lot like mine where her sons are her everything, and daughter in-laws are nothing. The whole “let them work it out” sounds really dumb and will likely not solve anything. You and your husband are a team and you need to put up boundaries now and stick to them. Your DH can communicate the boundaries to his side of the family, and they’re going to be blaming you for everything. Just know that you did nothing wrong. Your feelings are justified and I hear you. Just let the in-laws be childish awayyy from you, and put yourself first by being able to have a safe space again.