My wife is fine with my dressing, so it's really me that holds things back. The only way to get over my embarrassment is to dress in front of her. It is working. The more I do it, the less "weird" I feel, but it is always there. I like getting ready with her, BUT, I don't like her seeing me in inbetween states: makeup but no wig, bra/panties/forms but no clothes, that kind of thing. I don't want her to see her husband when I am dressed.
I feel for the wives and girlfriends. Crossdressing is just its own beast and no corollary to anything else in life.