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and the plot just got a whole lot deeper..
I think that's actually the reference of the novel(?) Lucrezia got divorced with his 1st husband with the excuse of being impotent. Just like what happened with Ruby's previous marriage.
Yep, it is.
Other than that some people dont seem to know but...
Fun fact: The Borgia family is an actual noble family irl, and there was a rumor that Cesare Borgia and the popes illegitimate daughter, Lucrezia Borgia had an incestuous relationship. It was an accusation the first husband of Lucrezia made but it's never been confirmed whether it's true or not.