All I can say is I really feel for you, your kids, and yes, even your W. You really sound like you are holding up well, and I congratulate you for navigating these perilous waters so successfully. Keep being strong for your kids. I think Grace is onto something--kids that age aren't likely to volunteer to see a counselor, and if I may stereotype a bit, boys especially aren't likely to do so. Still, you are right to think about forcing them to see a C.
Stay strong and keep up with your detachment and GAL.