A lot of women would respond to the sudden knowledge of their husband's crossdressing by saying that the person they thought they knew turned out to be a total stranger. For most, that is an overstatement, as crossdressing really doesn't change much about us, except that we like to wear women's clothing on occasion. But to emulate a woman, present as one to other people who actually believe you're a woman, and to build a secret second life complete with another social circle around it really does bring out an entire facet of the person she thought she knew, and she would be correct in saying something like that. You really did create such a second life behind her back and without her knowledge. She probably feels like a fool, married to someone she doesn't know who might well be gay or a candidate for a sex change or any number of things that have likely crossed her mind.
In order for you to repair this kind of damage, you're going to need to be patient. It is going to take a long time for her to not feel like a fool who has been had, used, played for an idiot, and who has wasted 28 years of her life making her home with a complete stranger. And you may well not ever get her back.
