Snoke makes it known that he's going to be fucking Ren very soon. Either Ren asks Hux for help or Hux offers it, but the main idea is that Ren is a virgin and doesn't want to displease Snoke in bed, so Hux fucks him and teaches him what to do.

Top!Hux being gentle at first, but saying things like "Snoke won't be this way with you, he will not make you feel this good" and eventually fucking Ren hard and painfully, but never stopping to tell him things like how Snoke will want him on all fours, Snoke's going to want to make him scream, etc.

Bonus: A (somehow) happy kylux ending would be nice!