When I get there, Windhelm is in the middle of a celebration for Jorunn's 10th year anniversary of being king. As expected, there is a party-pooper in the form of Fildgor, Jorunn's twin brother who resents the fact that he didn't become king. Fildgor's jealously leads him to start a civil war and making multiple attempts on his brother's life, each one stopped by yours truly, though Naryu does show up to help occasionally.
A Breton illusionist comes closest to slaying Jorunn with daedric poison, but thanks to a convoluted ritual involving dream walking and vampire blood he recovers fully. Does this mean Jorunn is a vampire/dhampir now? Not sure. Majorn the Ancient, the vampire who so willingly donated it to me after I helped him slay his son for making "sentient" thrall, seems to think so. Pity the game doesn't let me slay Majorn too.
After much chasing, I finally catch up to Fildgor at Sovngarde (of all places) and defeat him there where he is humiliated among all the dead heroes. I figure that's enough of a punishment for him and convince Jorunn to let him live. I also collect the final tome of Shalidor after one more silly trial from Sheogorath, and learn that the fighter's guild council has put out an arrest warrant for their current Argonian guildleader for he murder of their previous Nord guildleader. That stuff advances pretty slowly in the background.
I think Sheogorath's uncle was someone's stunt double in Resident Evil?