You have one major advantage your not baptized! I don't know the ages of your kids but you can have open and honest discussions with your children. Start making a list of all the problems with the organization and what they have and are now teaching. Also have a list of all the scriptures they have changed in thier bibles. Then make a list of all the reasons why the bible is not a book to be taken seriously, all the prophecies that didn't come true , mathematical mistakes, contradictions and just plain crazy stories like Noah's flood.
Show your kids the science behind ice core samples and how they have 800,000 years of ice core and none of it shows a global flood. Mention how one drop of breast milk has I million white blood cells showing God didn't want people to kill themselves by not eating blood.
Get old copies of JW litature showing how their wrong all he time. Introduce these things slowly and as the kids mature enough to understand and if your husband says something just say all the evidence shows you have been deceived. The chances are very good all your kids will leave the cult. I wish I wasn't baptized!!