Good for you for finding a way to be turned on by your wife's short hair. Making the transition is hard for a lot of us long-hair-loving guys when our women get the big chop. Hopefully you were able to keep her braid when she first cut it short.
You might consider exploring farther this nascent interest in haircutting. I do love long hair, but there's still something deeply erotic about seeing hair cut off and transformed to a new look. And if you can get into it, it may be a way of enjoying your wife's shorter hair during and after hairdresser visits.