TIFU by playing seduction.

TL;DR: seduced every Karling woman I could find, united all of the Karling territories in two generations under my grandson without realizing it.

I picked some obscure count in Middle Francia just so I could screw around the game, in the literal sense. Turns out he was married to his cousin and 18 years old, after having one son, I managed to convince the pope that divorce was a good thing in my case. The son gets important later on.

My character than spends the next 40 years going after everything with a skirt, byzantine princesses, heretical female bishops, the cousin he divorced, the queen of Asturias along with her sister and their mother.

It also turns out that you can invite women to your court as easy as anything once you have them as lovers. I think of how cool the story of Baldwin stealing a Karling princess was so I get four of them. I marry the eldest to the son of my first marriage and have legitimized bastards with each of them. Like you'd expect the Karling blob explodes into a civil war after the death of Charles the great. What I don't expect is that every one of the 4 women I've wooed to end up as queens, neat, my son is now king consort. Fast forward 10 years and a lot of plots and intrigues I didn't pay any attention to and I die, probably fucking something.

Now playing as my son I get a surprise: http://i.imgur.com/iVf5XAf.jpg

And the old goat in person: http://i.imgur.com/vVUTmCT.jpg

Farewell count Nibelung, father of kings and seducer of Empresses, though love you managed to unite Europe. Now I'm leaving that save because I wanted an easy game without any responsibility to actually run anything.