Why would you believe it isnt coming from the Divorce, you working together doesnt affect the Fact he has probably been made aware you are not together and he has probably heard you arguing.Check out if he has enough to do at daycare and is not left to be bored there,,and do you do enough with him how about being involved in Activitys with him. Basket Ball .sports etcIf this counciling isnt working drop it, and find some new person.