this reminds me of something i recently read about the parents of the first Qin emperor, who were embroiled in a similar scandal, albeit without passionate murder.
I recently listened to a series of podcasts where this was mentioned on Our Fake History, though my recollection was that he seemed to think the story's accuracy was questionable.
interesting, i didn't dig too deep, but it seems totally plausible that a 2200 y.o. story of sexual intrigue could be fabricated