
In royal families to ensure that should anything happen to the wife/wife’s child the king/emperor take an empress and at least a queen (which is equivalent to a concubine) so that someone with royal blood can still take over should anything happen. The king isn’t wrong for having a second wife but that fact that the second empress didn’t get punished for the crime she committed can only be attributed to how the ruling power works in that empire. Concubine (or queens) of the emperor tend to come from high ranking ducal families that hold a lot of power in that empire so it’s not unnatural for the emperors hands to be tied when it comes to handling such people. In summarisation, royal and nobility politics are extremely messy. In most cases and stories where the emperor has multiple queens (concubines), a power struggle ensues between the families backing them to ensure that the son that that queen(concubine) gives birth to is crowned as the prince as opposed to the son that the first empress gives birth to. This is why assassinations are so frequent in royal tamiles- because it is most commonly the work of the families the support the queens(concubines)
lindens should kill his father as why can't the king have only one wife and one family and he is so weak can't protect his family