I struggle still to give them a pass on this but, well I do...
Yes, it is hard hard to stay sympathetic to the victims when the organization they follow is so contemptible. If you've managed to keep it together as the UBM for 20 years, give yourself a pass too--you've earned it!
Being married to a JW for as long as I have, there have been many land mines I've had to manuver through in just keeping my family in tact while trying to hedge all the JW stuff ... Fighting that monster has become more than a 12 round slug fest taking body blows and hooks from different directions while never really throwing many of my own. Biting my lip and strapping my tounge to the roof of my mouth to keep the peace has been more than draining.
Walking on eggshells every day is draining. I thought that was the worst part, taking all the verbal shots while knowing that any response in kind would only makes things worse. One thing we UBMs have in common with the DF'd and DA'd is the experience of being considered the enemy, an outsider in our own family. It brings a clear understanding of what it means to forgive "seven times seventy" times.
Why would she do these things if in fact she wants to be a JW?
That's hard to say, it could be many different things. She might feel that by making accomodations to you and the children that she is holding the family together. It may be a little act of rebellion for her, tasting the forbidden fruit. Or it may be a taste of normalcy that helps her cope with the Watchtower pressure. Perhaps she is mentally "out", but can't quite let go because she fears the reaction from other JWs. If you ask her about it, there's a good chance she can't tell you why; she may not really know herself. Switching between a Watchtower personality at the Kingdom Hall and a genuine personality elsewhere causes that confusion.
You can't force her to change; she has to want it herself. So the best you can do is love her no matter what, and show her that you do.
Good luck to you and all your family!