Like most responses here, there is no text book way to go about this. You just need to be subtle, like suggested earlier in a thread try showing her a picture. From there I would start with something in the middle, start wearing like girl shirts. Try going for more of an androgynous look, something that won't just shock her. At the end of the day though, nobody here really knows your wife better than you, So with that being said you will probably more or less know how she will react depending on how big of a leap you will take. I hope this helps, stay frosty~
