JWs teach death of one spouse ends the marriage and, when resurrected, the deceased spouse will never
Well, that was their teaching until about 5 or 6 years ago.
Then they printed a "Questions (made up by us but we'll say they are) From Readers" that muddied the waters, and basically said "we don't know what will happen".
Best guess is that they got tired of getting weepy letters from distraught widows & widowers asking them "are you sure?" and so wrote a more intentionally vague piece on it.