The way i look at it is that if you didnt tell her now she could have gone down the JW road for the next 20 years, and then finally figure it all out and it would be so much worse, all though this stage of her life will be tough for her (losing a loved one as well as finding out the real truth about the org both at the same time), i think it will make her alot stronger er when she pulls through it all. as for you trying to help her feel better and to help her pull through i think as long as you can be there for her when she needs to talk or when she needs a shoulder to cry on that is the most comforting thing. Dont worry it will all work out,
Sam.