That sounds like a tough situation Lisa. As other people have said, one of the bets things you can do (after praying, of course) is be a good example. At least he now believes in God the Father. That's a big step from where he once was, and a third of the way there - give praise for that.
Now, if you can get your husband to agree with Jesus on the things He said about God the Father, that He is good, loving, the creator of everything, etc, and get him to see that Jesus was a good man, led a good life and taught many good things.....many non-Christians will agree to that. The whole "Jesus was a great man and and a great teacher and the world would be a better place if we followed his teachings - but he was a man and not God" thing.
That, then, that leads us to "Lewis' Trilemma" You should be armed with this and aware of arguments against it (you'll find a lot if you Google it, and none of them can hold water) you will be able to present it to your husband when the time is right to do so.
"I am trying here to prevent anyone saying the really foolish thing that people often say about Him: Im ready to accept Jesus as a great moral teacher, but I dont accept his claim to be God. That is the one thing we must not say. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. He would either be a lunatic on the level with the man who says he is a poached egg or else he would be the Devil of Hell. You must make your choice. Either this man was, and is, the Son of God, or else a madman or something worse. You can shut him up for a fool, you can spit at him and kill him as a demon or you can fall at his feet and call him Lord and God, but let us not come with any patronising nonsense about his being a great human teacher. He has not left that open to us. He did not intend to. ... Now it seems to me obvious that He was neither a lunatic nor a fiend: and consequently, however strange or terrifying or unlikely it may seem, I have to accept the view that He was and is God."
We're praying for you and your husband.
~A