A lot of time and understanding is what's in order right now. If your wife doesn't wish to talk about your crossdressing at this time then you may have to wait until such time when she's more approachable on the subject, with occasional delicate prodding along the way. Remember, you've had many years to adapt to your own cding while she's had only 3 weeks.
Start with rebuilding lost trust as a result of the deception, and bring her fully into your life.
Honesty is the key from here on out.