(((Cognac))), your husband is a fool. Adulterers won't inherit the Kingdom either according to the Bible.
Do you think he wanted you to know that he was messaging this girl? It's cowardly but I've known JWs who have done this sort of thing in the hope that their partner will go out and give them grounds for a 'scriptural divorce'. Of course, if you think the marriage is over then divorce him and leave him in the no man's land of an 'unscriptural divorce'.
It seemed as though he came so close to seeing TTATT, what happened to draw him back in?