"Pull over. Let me drive."
"If you will allow me to…" But Spock’s words trail off, and Jim almost smiles at the way his eyebrows knit together.
"I can bend my legs if that helps," he offers. His legs are on either side of his first officer’s shoulders. Spock’s mouth and tongue have been focused on his dick for the last twenty minutes, intent upon exploring every inch of him. Finally sliding his mouth down to Jim’s balls, tentatively licking at them and even sucking gently.
It wasn’t until his tongue dipped below his ballsac that he paused.
He knows Spock understands the mechanics—and the need to stretch Jim before he fucks him. He read everything he could find on human sexual practices once he realised Jim was just as interested in moving beyond the impromptu kisses they shared during their last mission—isolated for three days and waiting for rescue.
"Perhaps," Spock murmurs agreement, bringing Jim’s mind back from the pleasant memories, the heady rush he felt when their lips met for the first time. "If you have no objections?"
"None," Jim assures him with a grin, drawing his legs up and letting them fall open just enough that Spock will have clear access. His face stilling in concentration, Spock applies lube to his fingers with precise movements. His eyebrows are still pulled together as he lifts Jim’s balls gently with his thumb.
He pauses there though, gaze coming back up to find Jim’s. ”I have no wish to injure you,” he says quietly.
Jim reaches out to squeeze his slippery fingers. Spock’s breath catches a little and Jim smiles again. ‘You won’t hurt me, I promise.”
Spock holds his gaze for a second and then dips his chin just a fraction. Just enough that Jim knows he’s reassured. It doesn’t last. He slips his fingers between Jim’s ass cheeks, intently watching Jim’s face for a reaction—for any signs of pain. Eventually, when he finds none, he tips his index finger inside. He pushes in slowly, but it still burns.
Jim wills himself to relax even as his own breath catches. Spock stills.
"It feels good," Jim assures him. Or it will in a minute. "It will," he amends because he can’t lie to Spock. Doesn’t want to anyway. "Keep going."
Spock doesn’t pull away, but there’s a crease between his eyebrows now and it’s no longer amusing.
Jim can feel his worry through their contact. His uncertainly. And that’s not at all what he wants. He reaches out again, this time to brush his fingertips over Spock’s chest. ”Or if you’d prefer,” he says softly, “we could trade places.”
Spock’s head tilts to the side. ”You would prefer to penetrate me?”
Jim watches the colour rise in his cheeks and knows he likes the idea. Brushing his knuckles over one of Spock’s nipples, he licks his lips as he nods. ”Any objections?”
"Negative," Spock answers, his voice lower. It was Jim’s preference to begin with, but when Spock expressed an interest in topping, Jim agreed enthusiastically. But clearly, this will work as well.
Smiling, Jim pulls away from Spock’s finger, which is then fastidiously wiped on one of the cloths on the bedside table. Jim sits up and waits patiently and then when Spock looks at him expectantly, he pounces. Pounces carefully, using his weight to lower Spock’s body to the mattress. And then he kisses him, framing his face between his hands and humming in contentment when Spock does the same.
Like this, with Spock’s hands at the meld points, he can feel his emotions more strongly, feels how much Spock wants this. And when he slides down his first officer’s body and takes Spock’s dick into his mouth, Spock cradles the back of his head, his breaths growing shallower.
Jim takes his time, just as Spock did, giving attention to his cock and his balls, pulling them into his mouth and that makes Spock arch up. Jim tries to watch him, watch the minute changes of expressions, the warmth there as he meets Jim’s gaze.
Jim lets his balls go then, smiles at him and squeezes his fingers when Spock reaches. It’s difficult to apply lube one-handed, but he does it. Rubs between Spock’s ass cheeks and then dips back down to close his mouth over his dick again.
And that helps with the pain when he pushes a finger in. Keeps Spock’s mind on the pleasure, the wet heat of Jim’s mouth. He sucks gently, harder still when he pushes another finger in, squeezes at Spock’s hand to reassure, but Spock doesn’t seem to be bothered by the sensations.
His legs open wider and Jim pushes in another, stretching him carefully until Spock, voice raspy, says, “I believe I am sufficiently prepared.”
Jim kisses his dick before he pulls away completely, smiles down at his Vulcan, at the dark flush across his cheeks. His eyes are bright too and when Jim lifts his legs up, Spock winds them tight around Jim’s waist.
Jim takes his time, pushing in slowly, letting Spock get used to the sensation. His eyes are full of concentration, like he’s considering every movement, every ripple of muscles as Jim slides in.
"Okay?" Jim asks, breathless now, muscles quivering as he fights to hold himself still. Spock’s fingers skim over his cheekbone, face soft now—that smile in his eyes that no one else gets to see.
And he sounds a little breathless too when he answers, “I believe the exchange was a logical choice.”
Jim laughs a little and the answering mirth in Spock’s eyes fills his chest with warmth.
"You may proceed now," Spock tells him seriously, his legs tightening. Smiling, Jim slides his hand between their bodies and takes Spock’s dick in hand, which breaks the calm expression a little.
Jim starts moving his hips, slowly at first—no need to rush. They’ll get there in the end. For now, he wants to concentrate on the way Spock’s fingers trail ceaselessly over his skin, on the feel of his heels as they dig into his back.
He could stay like this forever, he decides, wrapped in Spock, and still it wouldn’t be enough. And he knows, from the answering warmth he feels from his first officer at the thought, that he feels the same way.
Forever, he decides. That’s exactly what they’ll have.