Drew,
All it took for me was one flaw in the WTBTS version of things for the whole house of cards to fall. The reason? Because it claims it is the only truth. By inculcating me with their black and white thinking from the day I was born, it was black and white thinking, on my part, that allowed one chink to condemn them completely. Perhaps this was what kicked in your wife?
My exit was in the 80s, though. I understand there is a lot of talk of "imperfect humans" these days, and waiting on Jehovah... So maybe they filled that hole with some putty since I've been gone.
Best of life to you and your wife,
Shoshana