Hello, I'm a married cross-dresser, too. My wife is also quite supportive. It isn't so much that she's amused by my cross-dressing; it's more like since it gives me joy do so it pleases her as well.
Her only complaints are that I sometimes look better in her stuff than she does. I'm not so sure about that, though. There are mirrors in our home.
Once upon a time, I did get sexually excited by wearing women's close. But, that was years ago (I'll be 40 in September). These days, I find women's clothing can be a sensual pleasure (as in pleasing to the senses), but not really a sexual one.
Usually, it's just that I feel like there are times when I should be dressed in women's clothes. I think that genderflux or genderqueer are probably good terms for me, as opposed to transgender.
I think you are in the right place. Welcome aboard!