Hux was always aware that he was a clone (One of the reasons he's set against clone armies) and thus strived to make himself as indispensable as possible.
The inevitable happens and Kylo Ren (who has no idea) escorts him to a deserted planet where he'll be judged worthy of being possessed or discarded as an spare.
When they get there, Hux is shocked (and maybe devastated) to find that one of the other clones was already chosen and he comes face to face with Palpatine wearing his face (maybe a bit older or more scarred, easy to tell the difference between them).
Turns out, Hux's plan to make himself valuable worked - he won't be killed - but Palpatine has other plans for him. (Palpatine always thought himself attractive)
Palpatine!Hux/Hux, Kylo/Hux - Selfcest? Clones, Non/Dub Con
The inevitable happens and Kylo Ren (who has no idea) escorts him to a deserted planet where he'll be judged worthy of being possessed or discarded as an spare.
When they get there, Hux is shocked (and maybe devastated) to find that one of the other clones was already chosen and he comes face to face with Palpatine wearing his face (maybe a bit older or more scarred, easy to tell the difference between them).
Turns out, Hux's plan to make himself valuable worked - he won't be killed - but Palpatine has other plans for him. (Palpatine always thought himself attractive)