Bit of back story - My OH has a really toxic relationship with alcohol, he doesn’t drink often but when he does, he drinks until he can barely stand and shows no consideration for anyone else. We have been really struggling with our relationship and I have made it clear that unless things change we will be separating as I’ve been desperately unhappy. MIL knows this.
This year we spent Christmas with OH’s family, we travelled over an hour Christmas morning to spend the day with them and the plan was to visit some of my family and some friends Boxing Day. Christmas Day was lovely, the children (4 and 10) enjoyed themselves and everyone seemed to have a good time. That evening I went to bed around 11ish. My OH stayed up drinking with his mum, they were so loud and played music/sang at full volume. I knew that if I tried to get my OH to bed it would annoy him so I just left him, but did text a few times saying they were being very loud. That night I didn’t get any sleep. I went downstairs at 7am and they were still drinking/playing music, my children were waking so I told them they needed to go to bed because it wasn’t fair on them to witness this. The two of them could barely stand/talk. They began arguing and physically fighting. Eventually they went to bed and I took the children to my family for a few hours. I spent the day exhausted and sad that our plans for the day had been ruined. I drove home that afternoon, with the window wide open as I’ve never been that exhausted.
When we got back I told OH I was done, this was the cherry on top and I was done. He apologised profusely, said he would get help and would not be drinking at all anymore.
MIL has not apologised once, she said to OH she had a lovely time and didn’t see the problem as the children hadn’t be woken (despite me and her partner not getting any sleep).
She was supposed to be coming on a day out I’d organised tomorrow but I really don’t want her to come. She keeps messaging OH asking if she can come. AIBU to say no ?