The husband's reaction can vary greatly. He could be embarrassed if he's more conservative. However, if he has a sense of adventure and loves his wife's creativity, he might embrace it wholeheartedly. In one true story, the husband was initially a bit self - conscious but as he saw how happy it made his wife and how much fun they could have with it, he relaxed and started to enjoy the crossdressing experience. He even started to give suggestions on how to make the look better.
Well, in a particular true story I heard, the husband was very surprised at first. But his wife explained her reasons, like wanting to break gender norms in a fun way. He then became quite interested and actually participated actively. He was curious about how it felt to be dressed in women's clothing and they had a great time exploring this new experience together. They even took pictures to remember the moment. It was really a bonding experience for them as they shared laughter and a new understanding of each other.