The key to getting someone out of the jws is to get them away from their indoctrination as often as possible. Try to find ways to miss meetings. Feign sickness if you need to. Ask her to please stay with you when you feign sickness as you need her help and make sure she is the one to stay home when one of the kids is sick.
Use the family study to bring her out of the indoctrination too. Study only the Bible. Prepare ahead to cover subjects that show the jws are not in line with the Bible. Get the children involved. Have them comment on how they feel about the inconsistencies between the Bible and what the wt teaches and even the inconsistencies in the Bible itself. Ask them leading questions. Out of the mouth of babes come such gems.
Plan vacations as often as you can. Don't go anywhere near a kingdom hall on vacation. Show your wife attention and plan date nights with her. What does your wife really love to do for fun? Surprise her with tickets to concerts, movies, musicals, whatever she really loves. Make sure they are on meeting nights. Plan weekend getaways with just you and the wife away from the hall.
There is a reason the wt keeps their recruits so busy and steadily attending meetings where they hear the same things over and over. It works. You have to break that indoctrination to allow your wife breathing room to really think for herself.
If all this fails, your only choice is to stop attending yourself. After a while, she may get tired of getting the kids ready and attending by herself. The wt world is lonely when you are considered damaged goods with an inactive husband. The love bombing will wear off and so will any help for her and the children. Hopefully, it will make her start to think.
I wish you the best. It is a long road, but keeping the best interests of your kids in mind is helpful. It would be great if they can grow up and be free to live a normal life instead of struggling with the same issues you are.