While this certainly appears that your wife is taking advantage of the situation, basically it's a trade off; you're doing something that she doesn't like, but she tolerates it in return for your doing something that she likes.
While not ideal, it's certainly better than not being able to dress at all.
It was one option that I had offered my ex, which she declined to accept. She didn't want a crossdressing husband, no matter what other considerations were offered.
Consider yourself lucky. Most women don't want anything to do with a man who crossdresses. Oh, and the chances of you finding another woman who would even tolerate your crossdressing?
About zero.
don't forget that.