I fear this. It's hard to know what my responsibilities are in every scenario. My fear is that the kids will do/say something at school that will get CPS involved, and a finger will be pointed at me for being aware of Ws behavior and not doing enough to protect them. I do have faith that should that happen, I will be dealing with rational professionals who can sort/see through things. One thing about my W is that she is low-functioning and has poor relationships with nearly everyone. Her issues are quite out in the open and she isn't good at convincing people she is rational for very long.
I feared the same thing. There is a point at which a judge will look at the behaviors and actions, or inactions, or both parents and decide you both deserve each other and neither is a good parent.
Are there any actions you're taking that can be documented to show what you're doing to ensure the kids are being therapeutically supported?
One of the things my L recommended was to establish a relationship with a child psychologist and to find a support group, something to demonstrate that I was taking my concerns seriously. Something that others could testify to, if it came to that. I established a one-to-one relationship with the school's family specialist, got my son into see a child psychologist (under different pretenses, but you have to do what it takes), and was in a support group for women and had an individual therapist. I could also point to the steps I had been taking to leave when the time came.
If you put the needs of the kids ahead of yours, in my experience there is a different door that opens.