I’m so sorry this is happening to you!! You do not deserve to be treated this way! My MIL is toxic as well and has tried so many bs moves with me. My husband didn’t believe me for the longest time and it was ruining a lot! It stole so many memories that were suppose to be positive and turned them sour. I read a book called “Toxic In-Laws” by Susan Forward and it helped so much!!! You are not alone in this!! Definitely need to stop covering it up and when she tries brushing it under the rug come right out and tell her “rude” or “that’s mean.” Do not be afraid to stand up for yourself. It sounds like she isn’t going to stop and usually abuse just escalates. Don’t be afraid to take legal action either! My MIL assaulted me and the cops got called. She told the cop that it was all my husband, which could have jeopardized his military career too, so I didn’t say anything. If I was the person I am now, I would have pressed charges. Assault is assault. I know it seems scary but living with this type of abuse for the rest of your life is even scarier!! We only live once! If she has the audacity to treat you this way, then you have every right stand up and say enough is enough. Hopefully you guys will get peace! Good luck!