In my past...during our nasty custody/divorce case..a guardien ad litem was assigned..this is an person who is looking out for the childrens best interest in the divorce....you can request this put in place...and also another tool was that the only communication was done thru a notebook that went back and forth. That way there is less chance of the children over hearing mommy and daddy argueing. I must be mistaken but I thought you had said he only had visitation on the drive to school..