I was an unbelieving mate for several years. We are now both happy and JW free!!!
Don't let them conflate your love for each other with love of the org.
Keep showing her in every way you can, that you love her; In or out.
Nothing will ever change that.
Make sure she knows you will respect her; in or out. Don't let them put you at odds. If a wife senses you have a problem with her because of her decision to be in the org, expect her to dig in. If you have no issue, she can be at ease. Do everything you can to cultivate a mindset that you are at peace with her as a JW, and love her all the same.
The hardest thing will be the children. The desire to keep the org from getting their hooks into them will give you a sense of urgency and make you want to fight. Don't. You will be better positioned to help the kids IN THE HOME. For a whole range of reasons not even related to the WT. Imagine your wife's new JW husband and the influence they will have with your kids. Don't let that happen.
I can talk more about how to be OK with a JW wife with respect to the kids. You just have to cover a lot of bases.
Let her see that you won't grow horns, go crazy, get killed by Jehovah for leaving.
Love love and love. All you need is love.
Then if she trusts you, and feels safe with you, at some point she may be willing to discuss your feelings about the WT and why you left.