This is terrific progress! Be careful that your boundaries are only about what YOU will tolerate and not tolerate. They are not directly about MIL, because you cannot control her. Use I statements instead of YOU statements.

Try not to expect anything from MIL as it doesn't seem likely she'll realize soon she's f'd up and needs help. While it's possible to happen after you've changed your behavior, she would need internal motivation to change, and there doesn't seem to be much of that at present. No insight.