Derek as Khal Drogo (but set in snow beyond the wall) and Stiles as Daenerys Stormborn (although he's a greenseer of the Children rather than a dragon)

In which Robert Baratheon weds Catelyn Tully on the eve of rebellion while Cersei Lannister, the rising sun of Casterly Rock, is sent to the far North to marry Ned Stark and become Lady of Winterfell. In consequence, the fates of these two women, the people they love, and the game of thrones are changed forever. But winter is coming, as it always will.

At the age of thirty-seven, Dorian of House Pavus could now say that the worst day of his life was his wedding day... After a failed blood-magic ritual from his father, Dorian's body is forever changed. However Halward isn't about to let that get in the way as he offers his only son up as a bargaining chip for peace in Seheron. Dorian, son of one of the most powerful Magisters in the Imperium, is now being forced to marry a Qunari. And to add to the man's frustrations, he must be pregnant within a year.

“You must never reject an alpha’s advances, or they will force them. Or direct them elsewhere and sully your name with whores and bastards,” Alicent explains to him, in the days following Aemond’s first heat at the age of 12. Explaining his added duties, his unexpected new place in society. “After enough times an alpha may let you prepare with oil. But at first you must endure the mating bite, and then the pain of every encounter after.” Or: The world teaches Aemond what it means to be an omega. And then, with much time and healing, his new husband helps him unlearn it.

"Oh," Izuna said -- delicately, while studiously reading his folder, "I'm afraid we need someone with a ... strong personality for Naohime." "Why's that?" Hashirama replied, just as painfully polite. The daimyo's mediator kept watching them and scratching little pointy words in his notebook. "Because if your man doesn't prove that he's dangerous and has the personality to use it on her if she pushes him, it's going to turn abusive," Madara drawled. Hashirama stared at him for a blank second. The daimyo's envoy stopped writing; even his stone-faced Aburame bodyguard arched her eyebrows over her darkened spectacles. Tobirama stretched out across the table without another word to take back one of the folders Izuna had spread around him. -- The daimyo is over the whole Uchiha/Senju war. They're going to become one people if they know what's good for them. Madara hates it enough without having to marry a woman too.

The wedding’s going to be tonight, presumably so no one involved has time to get cold feet, which gives Geralt just enough time to clean up and get the dirt off his armor and overthink every tiny little detail of this arrangement.