From what I have read on this forum and seen and experienced in my own life.
Quite often there are other problems either small or large and the jw wife or husband disagreeing on religious issues just exacerbates the relationships problems and is used as the final reasons for anger or divorcing.
I think that if person can identify these other issues and heal them, then show genuine affection and love for the other, with gifts and kindness and true love. Sort of the way they were treated when you courted them. That there is a higher possibility of success.
If we can convince them that they are truly loved and that they have meaning for us and that they are important in our life by showing love and surprise dates and time alone, always avoiding any conversation about the wbts until all other issues are healed may work.
It is difficult to get angry with some one we know truly loves us. Accept that this is going to be a long long process and needs effort.
Always make it known that you love and care for and will never leave your children or your mate.
Outoftheorg