Pardon me for saying this but you sound very naive and foolish to believe this guy. Do not threaten to tell his mom or his wife. Send him a message or call him, when you are sure that he is at his home. Send him a message stating that you would be going out of town on an emergency and would not be able to contact him for the next few days. He would understand that if he continues with this nonsense then there is the risk that he might get caught..
For heavens sake get on with your life. Please move on. This guy is not worth your attention or feelings.