If a JW married some one who was not a witness and when Armageddon comes, that witness will die at Armagedon no matter if the wedding took place over 20 years ago, and the person who was not a JW is now. It does not matter if their mate became an elder, a minsteral servant, or even a pioneer. That witness who married at non JW will die at Armageddon because they were not faithful to Jehovah at one point in their life time. There is no forgiveness in Jehovah for that.
I have never heard this...if any witless told me this,
I would ask them point blank, ''then why was Peter forgiven when he denied Jesus three times?''
I would ask them to show me the scripture that states being unfaithful is an unforgivable sin.