During the beginnings of courtship at a social event meant for expanding one's social circle or perhaps on their wedding day. Those were the usual times when a couple would likely experience dancing with one another for the first time.
Dancing wasn't inherently intimate considering it was something that could be done with friends or family. Yet, depending on one's partner, it could be a nerve-wracking experience that would be memorable enough to carry on for the rest of their lives.
Desmond and Leonor had never had the pleasure of a first dance. Their intimacy felt unshakable as they explored that side of their lives so thoroughly.
However, as they walked down the grand staircase that put them at the heart of the ballroom, Leonor's heart was racing as she finally realized the pressure of the situation. Perhaps her worries were misplaced when she spent the last couple of weeks unable to sleep or eat well due to the impending reality of having to face her father.