Danelle The ladies gave you great advice and threads to read.
Working with GGs for alot of them it is the keeping it from them that many seem to have the hardest time to get over.
I used to say TELL TELL TELL but now I say you know your wife the best.....reasons Reine had said.
Best Wishes on what you decide. And if you do make sure you explain it fully, do not say you will quit, do not make promises you can not keep be honest and answer any questions and repeatly tell her you are the same person she loves, you love her, you were afraid you would lose her but need to tell her and need her to understand. Be prepared and do it when you are alone.
Here is a link from yrs back where GGs tell how they felt from the not knowing and most finding out by accident.
http://www.crossdressers.com/forums/...rom-a-GG-s-POV