Sometimes, the timing on events is just perfect.
Yeah, sometimes the timing makes for better stories than anything prewritten, much like Dwarf Fortress.
My favorite so far was when Basileus Gabriel the Saint, mender of the Great Schism, mighty and beloved warlord of Byzantium and scourge of the heathen muslims, bedded a wild woman while out hunting and took her back to his court. Being a most virile specimen Gabriel sired many children with this wild woman in addition to his wife. As time passed and Gabriel sought to reclaim the lands of ancient Rome, seeking to truly restore the glory of his people, many of his sons and daughters perished under... curious circumstances and it was said in hushed whispers that his eldest bastard daughter with the wild woman was of a daemonic nature.
By the time of Gabriel's death his sons had all perished, whether by disease or the sorcrerus machinations of their sister, and his eldest daughters had joined convents, forgoing their claim to the throne. Such did the wildling bastard, spawned by satan to bring ruin to all Gabriel had built, ascend to the throne. Under her rule Byzantium was divided from within and assailed from without, her madness thwarting all attempts to reassert any semblance of order to the empire. Land was lost to the heathens to the East, and the restoration of Rome seemed doomed to fail. But, fortunately, the witch was already of great age by the time her blessed father had passed, and her reign was short, if destructive.
She was succeeded by her great nephew, the grandson of her deceased eldest brother, educated by his father, who himself was educated by Gabriel. He was Gabriel II, and he spent his life undoing the damage caused to his great grandfather's empire and fulfilling his dream of a restored Rome. Though none who came after him ever truly matched the glory of Gabriel the Saint, or Augustus Gabriel II, their lineage ruled over Europe, the Holy Land and Africa.
The Demon Child event has some really good potential for excellent stories if it pops up at the right time.