I would also think that since your son is old enough to think for himself, you should lay some TTATT on him. Wife won't let you talk to him alone? E-mail him. No e-mail? Print something out and leave it in his room for him to find.
Start with something small and that appeals to a young person like the thing about Job's family celebrating Birthdays and how the Society deliberately covered it up in the 2013 revision of the NWT.
PM me if you want the specifics of this.