married to a jehovas witness

[JesusHChrist]

It probably won't help since facts are the work of the devil, but you could review with her the list of failed predictions the JWs have made over the decades. Quite a litany of failure:

http://en.wikipedia.org/wiki/Criticism_o...redictions

A small sample:

1877: Christ's kingdom would hold full sway over the earth in 1914; the Jews, as a people, would be restored to God's favor; the "saints" would be carried to heaven.[26]
1891: 1914 would be "the farthest limit of the rule of imperfect men."[27]
1904: "World-wide anarchy" would follow the end of the Gentile Times in 1914.[28]
1916: World War I would terminate in Armageddon and the rapture of the "saints".[29]
1917: In 1918, Christendom would go down as a system to oblivion and be succeeded by revolutionary governments. God would "destroy the churches wholesale and the church members by the millions." Church members would "perish by the sword of war, revolution and anarchy." The dead would lie unburied. In 1920 all earthly governments would disappear, with worldwide anarchy prevailing.[30]