Dom!Kylo just bends Sub!Hux over the console and has his way with him. Right in the middle of everyone.
Of course, he is using his Sith powers to make sure none of them notice a thing, but that isn't all that helpful to Hux. Because even if he knows what Kylo is doing, there are right there and any minute now they are going to notice something, the Force can't be that powerful and oh kriff, Ren, right there!
Bonus for some serious doming, boot licking, name calling, making Hux beg. All those things that Hux gets off on and can never, ever allow his subordinates to see.
Kylux, exhibitionism, mind tricks.
Of course, he is using his Sith powers to make sure none of them notice a thing, but that isn't all that helpful to Hux. Because even if he knows what Kylo is doing, there are right there and any minute now they are going to notice something, the Force can't be that powerful and oh kriff, Ren, right there!
Bonus for some serious doming, boot licking, name calling, making Hux beg. All those things that Hux gets off on and can never, ever allow his subordinates to see.