My son is 4. His father has has sporadic visits with him throughout his life. This has all been dependant on his sobriety. He has a long history of meth and alcohol abuse and is currently on felony probation for 2 different convictions. He has custody of another child (the mother disappeared). Last year, my son's father took me to court (when he had a period of sobriety) and the court granted him 50-50 legal and physical custody with every other weekend visitation. Last November, he got busted using meth and his other child was removed from his home. I stopped visits and eventually he just kept violating his probation and the court is allowing him to participate in family drug court. He wants his visits back but just admitted using to me last month. (He is getting ready to serve two weekends in jail for this). Now he threatening to take me to court if I dont let him resume visits with our son. I have serious concerns about the safety of my son during these visits. What should I do?