I deeply feel for you sweetie. Self Development of your inner structure ( this does not mean self medicating, that must be supervised ) Gather from the pool of what makes you the better person you know you are, this is irrespective of Gender. It comes from the moral and life style choices you and your wife have made together, this may highlight a likely outcome with your loved ones. Check into the employment policies of your place of employment, they don't have to know why your asking !!
A therapist almost goes without saying, their input in helping you consolidate the positives and negate allot of the mind clutter that come from fear is priceless.
The fact you mentioned your sense of lying to loved ones, I personally would get ride of that guilt immediately.
Some wise person said our thoughts inform our actions and this is largely a true but until your post in this forum you don't seemed to have acted on any of your fantasies and so no real breach of trust or fidelity. The only real deception is to yourself, otherwise what I hear is a dedicated husband and father that has suppressed inner truth for the benefit of their loved ones.
I first started HRT in the mid 80's silicone implants were gaining controversy and saline come onto the market and GRS well it was barbaric allot of the new trans community were animate of not having final surgery. After 12 yrs I stopped HRT believing at least I tried but was uncomfortable with the idea of being neither one nor the other gender. I thought that was the end of it.
2 yrs ago the whole concept seem to over whelm me I thought about returning to HRT but all the same fears you've mentioned came with it, also I'm 48 not as convincing as I was in my 20's.
I thought it threw for 6mts ish, started HRT 14 mths ago and the Universe has supported me in ways I could not have believed.......We are always in the right place at the right time it's just believing that !!
And regularly check in at Susan's Place, you'll find the love of a mother, the guidance of a farther and the understanding and support of a whole convention centre of psychologists..... LOL
PS I just read the rest of the posts should have done that before posting myself...Bonna Fortuna