Even if you divorced your wife, she cannot marry you unless you had scriptural grounds for divorce, ie, your wife has to comit adultery, honey. You see you are not scripturaly free to remarry and therefor if she would marry you, she would be considered an adulteress. It is confusing, we know.
You have fallen for a woman who is in a cult, a high control cult! Your best bet is to try to get her out of JW. She will be disfellowshipped if she has any sexual contact with you. She will be shunned by family and friends who are JWs. You had better be worth it.
Best of luck to both of you. You will need it.