I have ideas for this scenario, but I definitely don't want to limit any potential filler's imagination so by all means, disregard this entirely:
I am weak for bad aftercare, or very unconventional aftercare, so grain of salt here. I feel like Kylo would be pretty shit at it (at least at first?), and Hux would probably be not particularly inclined to be seen like that, afterward. One moment he was fine, getting fucked stupid, and the next he was subject to-- to Ren's witchery, or something, hanging off of his every whim and leaving himself vulnerable to all sorts of disasters.
I bet their sex education was pretty much zilch beyond mechanics, so this would all be very uncharted territory. I don't know if Kylo particularly has the ability to be gentle, per se. I would lean towards "not knowing how to handle it", and probably making things worse (before they got better, or just constantly finding new lows). So I'd bet the aftercare they'd settle on would be really weird, and maybe not very nice, but in a very strange way grounding? Like, maybe Kylo would continue to handle Hux roughly, holding him down on the bed while he gets up to get water, a towel, loudly storming around the room because he can feel Hux's anxiety at being left like this. Or suddenly bringing up technical details of ships or historical events that Hux is struggling to remember, and sort of dragging him up with that? Kylo grabbing him and hauling him in to be "held" (in a restraining hold) while Hux just sort of seethes and dozes. Or-- you know how some people talk, after, to mellow out? Just bickering. Hux not being on his game on the insult department but just you wait, once he has a nap Ren is in for it.
Or maybe no aftercare at all! I could definitely see that as well. Kylo just making his exit once he's had his fill and Hux holding on to that awful feeling/suspicion of manipulation as more proof that Kylo is a monster.
Re: Kylo/Hux, D/s subspace
I am weak for bad aftercare, or very unconventional aftercare, so grain of salt here. I feel like Kylo would be pretty shit at it (at least at first?), and Hux would probably be not particularly inclined to be seen like that, afterward. One moment he was fine, getting fucked stupid, and the next he was subject to-- to Ren's witchery, or something, hanging off of his every whim and leaving himself vulnerable to all sorts of disasters.
I bet their sex education was pretty much zilch beyond mechanics, so this would all be very uncharted territory. I don't know if Kylo particularly has the ability to be gentle, per se. I would lean towards "not knowing how to handle it", and probably making things worse (before they got better, or just constantly finding new lows). So I'd bet the aftercare they'd settle on would be really weird, and maybe not very nice, but in a very strange way grounding? Like, maybe Kylo would continue to handle Hux roughly, holding him down on the bed while he gets up to get water, a towel, loudly storming around the room because he can feel Hux's anxiety at being left like this. Or suddenly bringing up technical details of ships or historical events that Hux is struggling to remember, and sort of dragging him up with that? Kylo grabbing him and hauling him in to be "held" (in a restraining hold) while Hux just sort of seethes and dozes. Or-- you know how some people talk, after, to mellow out? Just bickering. Hux not being on his game on the insult department but just you wait, once he has a nap Ren is in for it.
Or maybe no aftercare at all! I could definitely see that as well. Kylo just making his exit once he's had his fill and Hux holding on to that awful feeling/suspicion of manipulation as more proof that Kylo is a monster.