I have never had to hide my dressing around my SO. We knew each other 50+ years ago and I dressed then without her knowledge, back then, and always in secret. Since we managed to get back together, three years ago, she has known since day one and she encourages my dressing and approves of it.
While at home I am dressed 24/7/365. When we have to go out I underdress. I live in the Bible Belt, Deep South of the US, and crossdressing is very much frowned upon.