They have been properly married and a couple for over five years now, so Brielle shouldn't anymore be so surprised by the duke's compliments, but I still enjoy scenes like that a lot. The best one remains to be the one in Upotte, perhaps, or at least it's the one I still remember, many years later.
Anyway, it's now very much looking like there's no child. How is that even possible, unless the duke really is no good in bed?