Welcome, Kruise.
Your story is not uncommon here. Whether or not to come out to your wife is a difficult decision that only you can make. The only thing I would say is that, if you do eventually come out to her, it will be more difficult the longer you leave it. Most wives will take knowing but not telling to be deception, and it will not go over well.
There are many ways to handle your situation. Some people never tell. Some tell, but, after discussion, resolve not to transition ever, or not until the kids are out of the house. Some can't hold off, and have to start transitioning regardless of the consequences. **There is no one right way to do it.**
It is a tough decision, and one that only you can make. We will be here to support you as you make it, and to help you handle the outcome, whatever it is.
If you are not already seeing a gender therapist, I would highly recommend doing so.