Welcome!
Go slowly with her.
Look at this from her point of view. All she has known from infancy is that this religion is "the truth". JWs are "in the truth". Everyone else is deceived by Satan. Everyone else is about to be wiped out at Armageddon. She married "in the truth." Her husband gets bothered by something and starts investigating. She prays for him and expects his doubts to be cleared up, but in response to a question he suddenly announces that everything she believes in, everything she's relying on, is all BS. Her whole secure world is falling apart.
What's her first thought? Call the elders, right? They are the spiritually mature ones. Surely, they can come straighten hubby out.
Any reference to Crisis of Conscience, Captives of a Concept, or any other "apostate literature" is likely to freak her out.
My suggestion would be instead to stick to original Watchtower publications and focus on one thing. Pick one old WT book and ask her to read through it with you -- maybe Russell's Studies in the Scriptures 3 with its clearly incorrect date system and all its "confirming" pyramid measurements, or Millions Now Living Will Never Die with its "proof" that the patriarchs would be resurrected in 1925. Maybe let her pick which book to read through with you. Point out that it's a Watchtower publication, not apostate literature. If she's hesitant to read it and tells you it's "old light", you might just say, "This was published by the Watchtower Society. It's part of the meat in due season from the faithful and discreet slave. I'm not going to tell you what to think of it. I would just like for us to read this together at home." DON'T tell her what's in it. DON'T give her your conclusions. Just have her read it aloud at home and comment on what she's learning.
Listen to hear what she's thinking and feeling. Don't assume her reaction will be the same as yours.
If she gets upset and wants to stop, don't press it like a prosecuting attorney. Just stop. Don't nag her about the need to face the truth. She will need to process it her own way.