I think seduction stories naturally lead to "first time" stories. The story is almost (not quite) invariably about the first time between two people, so I think it's natural for the first time for one or both is a ready topic. What's awkward is writing multiple sex scenes while keeping an element of novelty, and that was one of the reasons I wanted to develop "hookup culture" stories, building on the club and those who've normalized hookup culture there: Emma, Margot and Anita.
But introducing Kennedy let me add a first time story among the potentially jaded hookup scene. There wasn't much seduction, in the sense that Kennedy arrived knowing what she wanted (from "the hottest girl at the club," no less, which was a slip that amused me even while I was writing it.)
But there will be more seduction yet, though we're well over halfway through the series,