It is truly fascinating how quickly "family values" evaporate when you start moving people down the succession line. One minute you're a pillar of the empire, the next you're being told to sit quietly in the corner while @Stalwart_Ascendant plays king with his half-dozen heirs.
Just a reminder to the court: I have spent a lot of time studying the architecture of our dungeons lately. Some things are much easier to trigger than people realize.