"she doesn't go Witnessing anymore and only very rarely goes to a meeting"
when it comes to change.....change is natural, like gravity. it's kind of like a cliff or an edge. walking to a cliff where you could fall(change) comes from doubting something, or from something radical happening. for her, to get to the natural gravity, or change (not allowing herself to be told how to think) the person has to have a feeling, or a slither of knowledge that it contradicts what they hear at church, then seek it out
someone who is far conservative and "into" something, like some JWs, their minds wont let them go to the cliff, the bathroom, or anywhere. you'd have to wrestle them, or beat them to get them there and they'll fight back....in the witness manner of course, meaning shunning and not talking to you.
.....other people, like in your wifes situation, they're already geared for their change, because they're not doing everything they're told. i especially take that from the above quote.
shes at the proverbial cliff, because for whatever reasons she has, shes not at all the meetings. so for all you know, her finding the site may have been a good thing. because people at the cliff, or at the brink of gravity....sometimes all they really need is a little push
think positive:)