Good point raised by some indeed, which I forgot to mention: be the best husband you can ever be.
Help your wife with everything, but especially the JW stuff if she wants.
Offer to join her for meetings, or drive her there if needed.
Cook on meeting evening, and clean the house if she is going and you are not.
It's possible your wife needs new reasons to continue loving you, so provide her with as many reasons as you can.
Why? Because (depending on how in your wife is), you are about to destroy her world. You leave her all alone forever in paradise. All alone as a spiritual widow.
She didn't sign up for this shit.
And, if you suddenly don't love God anymore, what about maybe you suddenly leave her???
She will feel insecure and need reassurance. This will be worse if she is born in....
I've always done my best to support our family the best that I can by cooking/cleaning and doing nice things for her and now so more than ever because of the guilt I feel for telling her how I feel about the Wtbts. I think that has been a great help so she doesn't think that I'm abandoning her.