Of course you're not the first. Many of us have hid CDing from our partners, and many others still do. Although I believe that telling as early as possible is the best thing, each of us must make the decision when/if to tell in our own time. For me to say otherwise would be hypocritical.
Religious objections can be the most difficult to grapple with, since it's difficult to change beliefs that are matters of faith. You'll have ask yourself if being TG is a choice that was placed as a temptation to test you, or if god made you TG to serve some other purpose. I don't have the answer to that question, but will mention that scientists are beginning to find evidence in favor of genetic causes. In any case, I wish you and your wife all the best.