I just presented some material that she had never seen before and she explained it away saying they no longer follow some of the teachings of the founders.
A good thing to say would be that you are examining the teachings that were taught when "Jesus inspected them and approved them in 1919" !
So, it would be good and fair to examine exactly what Jesus saw in 1919.
When you get to the depeer into the "BIble Teach" book, it will say that Jesus is Michael the archangel (excellent to debate as it is full of flaws), and it will also say that "Baptism is NOT to an organisation"... then ask her what the two questions are that JWs have to answer at the baptismal pool.
The second is "Do you understand that your Baptism identifies you as one of Jehovah's Witness in association with his Spirit Directed Organisation" !!!
I hope that some of that helps.
AO