Xiao Guangbi said this, as he gave the Jade Pendant to Jiujiu, suggesting it was just for play, but subtly hinting at a future engagement with the family.
And what standing did their families have? Although Mo Heng was a prodigy in his youth, he had been expelled from the Mo family. The Mo family, renowned in Bei Zhili, was an aristocratic family for centuries. Since they expelled Mo Heng, it must be because his virtues were so tainted he was unfit to be a descendant of the Mo family.
And what about Pei Qin? Coming from rural origins, let alone the position of a Third Rank Lady, even if she were of the First Rank, those who prided themselves as nobility would look down on her, at least in their hearts, if not openly.