thank you for being a supportive CD wife and wiling to participate wit his dressing. I wish more wives/SO were like you. Regardless of how long we have dressed, we experience a large amount of guilt and shame. Maybe he feels like you will not love him as much due to his feminine side? You have expressed interest, bought her things and participated. Sounds like you are doing the right things.
Ask her what you can do to make things better. I understand your feeling insecure as he hides his dressing from you, which make your mind go a mile a minute as to what else may he be hiding? Open honest communication is what you both need. Express to him any reservation you may have and things you woudl like to explore with him along his dressing journey.
Most Cd’s woudl love their wife to do these things Keep us posted and good luck, there has been lots of words of wisdom given.