Are you in a financial position to take your wife away for a week? A little trip, maybe even a nice weekend? It's already been mentioned by you and other posters that she's needing the "feel good" and is not currently interested in a life change or the doctrine. I doubt reading apostate books and getting into deep doctrine will interest her right now. The person emailing her is not giving academic stuff, but providing hope, at least in your wife's mind.
YOU have to provide that feel good for your wife! Please understand, I am NOT saying at all that you're not a good man and haven't been providing emotionally for your wife! But it's super hard to compete with "everlasting life in paradise" and a "resurrection where you can see your mom again if you come back to the KH."
From someone "in" who has NO CHOICE as my username suggests, you don't want to loose her again, or be stuck in again yourself! It's worth time off from work to get her out of the house just to let her decompress and cry and mourn, without the reading stupid emails. My humble suggestion would be not even to discuss the meetings until the last few hours of the trip, unless she brings it up first. Just let her talk about her feelings and don't judge them. She's got guilt, regret, dread of the future, and all kinds of other things that people who suffer losses have, that she should share with her caring husband before she shares them with an opportunist witness!