Sebastian sags against his cuffs, panting into the pillows while his body attempts to recover from the bone-shaking orgasm he just experienced. Jim is a very nearly dead weight against his back and he can feel the smaller man's body still trembling. Jim manages to come back just enough to reach up and free Sebastian's hands before going limp once again.
They lay in a pile of sweaty, tangled limbs for several long minutes of bliss before Jim stars to shift again. He slides off of Sebastian's back and rearranges their bodies until he's satisfied, with Sebastian flat on his back and Jim draped across him like a personal blanket, heedless of the still bleeding cuts.
He lets out a sigh of something that anyone else might call contentment. "I hate when you misbehave, but I love punishing you," Sebastian doesn't say anything, just wraps one arm around Jim and strokes his hand along the damp skin of Jim's back. "Eventually, though, I'll teach you not to let anyone else hurt you."
Sebastian lets out a low huff, "I told you I didn't let-"
"Stop lying to m-"
It takes only a split second, but Sebastian has flipped them over and Jim is pinned flat to the bed, Sebastian's knees holding his arms down. One large hand is wrapped around Jim's throat, the thumb pressing threateningly against the hollow of his neck. Jim's eyes widen fractionally and he lifts his chin, staring Sebastian down, nearly daring him to do something.
"Make no mistake, sir. I do let you hurt me. You could hire someone to bring me down, but we both know I'm the best of your lot. I could take any of them out without pause from half a mile away, just as easily as I could break your neck right now." He squeezes his hand, but Jim doesn't reply. He leans in close to Jim's face. "But I like what you do to me, I love it." He doesn't have to say what he really means by that. "And I let you hurt me. I don't let anyone else do that. Accidents happen, but you're the only one allowed that right. This is only. For. You."
He doesn't give himself the time to hesitate before he presses his lips hard against Jim's. He doesn't usually do this; he lets Jim start everything, but he needs to tell him, show him. Jim is squirming under him but Sebastian presses harder still, not letting up, forcing his tongue between Jim's lips.
Jim manages to get his arms free before Sebastian can stop him, but doesn't push him away like Sebastian expects. Instead, his hands are tangled into Sebastian's air and pulling him closer, moaning into his mouth, sucking on his tongue, drinking him in like a man lost in the desert.
Sebastian finally pulls back and Jim is panting against his lips, still holding him close. "I don't like it when you get hurt."
"I know."
"I can control how much I hurt you, but I can't control everyone else."
"I know."
"What do I do if someone hurts you too much? Enough that you don't come back to me?"
"I'm always going to come back to you."
"You can't promise that."
Sebastian moves off of Jim and rolls over onto his back, pulling Jim back into place across his chest. "I've done everything you've ever asked of me. This won't be any different."
Jim lay his head down and pulled the covers up to his shoulders. "Just know that if you ever don't come back, I'm going to find your corpse and I'm going to desecrate it. "
"I'd expect nothing less, sir"