Your wife seems like my wife. She is accepting but for now only as long as it's not something like nails or other things that can be seen by others out of the home and are obviously female. My wife has said to me that she isn't ready to be viewed by the world as a lesbian. The shorts she bought you could be worn with a T shirt and in her mind she might feel ok with you wearing that outside the home as it's less definite to her that others are seeing you a female or even a CD.

. Female style nails are very clear to the world that you are at least trying to present as female.
We are so eager in transition that we forget that sometimes that our loved ones aren't moving at the same pace. Patiences my dear....patiences. Give her time to adjust. Believe me I know its hard but you will have greater odds of keeping your wife.
Hugs
Kay