Two very important things I've learned from this. And these are just my beliefs, I don't know if they are right or wrong.
1. You must be strong - strong in the sense of taking care of you and your children, finances, etc. Strong about your boundaries. I don't know how exactly to explain it, but it is very important. Most especially for you but also the mlc'r sees any emotional distress or struggle as a weakness to be taken advantage of. I know this. I've been down this road.
2. Words without actions are meaningless. Very important!!! If the actions don't CONSISTENTLY match the words then the words mean nothing. This can be applied to all people in your life. Pay close attention to this.