Wife,
Please protect your children. I don't feel you should take off the RO. If he gets mad because you told his dad what is going on, God only knows how he will react. He can hurt you and your children. Don't worry about protecting him, he chose to do what he is doing, your children did not chose it for him.
They are the inocent victims in all this craziness.
Please get some help for yourself, talk to someone you can trust and who understands addiction. If you can't afford to get help, go to someone at a church etc for help.
Good luck,
Hugs and prayers coming your way