Brienne hogties Jaime and Cersei and takes them to Tarth. Then a lot of weird sex happens.
Author summary from Snickfic:
He was so tall. Conor mostly forgot that, somehow. Dumo was the first of the Wilkes-Barre guys to make it to the show, but he was still one of them, an equal - until now, as Conor surveyed the terrain and felt pretty damned unequal.
Dumo met Conor’s eyes. His cheeks were apple-red. “Please?” Dumo said, as though even now Conor might leave him hanging.