I found myself wishing to hear your wife version of the story, It feels like you've left a lot unsaid about the weekend but if you truly love your wife still, there can be hope for you both, you could try talking things through about your feelings for each (Not about JW's) focus on how much you have shared together the trails and tribulations of life having kids etc,
It saddens me on here to see how many relationships end when the faith in JW's does, people forget out of all the WTS and life you chose that person to love and raise a family with! Surely there must be more to our feelings for our partners than a religion? isn't that relationship worth fighting for even if the religion is gone? I say this to you because you sound like you genuinely love your wife and her you, ask her if Jehovah allows for her to leave you and you life together on reasons of your lacking faith alone?
reniaa