Work Text:
When Dave gets home he sets his wet umbrella near the door and shrugs off his large damp winter coat, tossing it on a small table to his left. He sighs, nose numb from the cold, it feels like Karkat turned on the heater a long time ago and it’s so fucking nice. Speaking of which, he removes his shoes and tip-toes quietly through their apartment in search of his boyfriend. He gets to their bedroom at the end of the hall and peers in to find him taking a nap. Aw, he wanted to annoy him.. It’s not super unusual for him to sleep during the day, but it’s soooo boring when he’s not awake. There’s a slight glow from the sun outside leaking in through the curtains, so it’s easy to see and step over discarded clothing and shoes on the way to the bed. He sits on the edge for a bit, watching his boyfriend sleep reminds him that god, he’s fucking exhausted. His eyes scan over Karkat’s sleeping form. He’s more sprawled than usual, face buried in a pillow, a leg sticking out of the sheets, and his hand hanging over the edge of the bed. Uncharacteristically, he’s wearing a black tank top and shorts. Karkat never wears shorts. Once Dave’s eyes have adjusted more to the light, he realizes that he’s actually panting. He leans further onto the bed so that he can reach the back of the troll’s neck. Placing his hand there, he’s startled to find that he’s really fucking hot, like, burning up and damp with sweat. While the little guy usually does run abnormally warm, this doesn’t even compare. Shit. Is he sick? Dave takes a warm grey shoulder in his hand and shakes. Karkat makes a little alien ‘mrrp?’ noise in response, his eyes open slightly to reveal slivers of glowing red. That explains the curtains being shut so tightly, his pupils are blown crazy big. His panting slows, but becomes slightly more labored once he spots Dave sitting next to him on the bed. This is worrying.
“Karkat, are you okay?” His boyfriend groans like he wants to go back to sleep.
“Mnno.” He mumbles. Dave tilts his head questioningly.
“Dude, you’re gonna burn a hole through the mattress, you need to like, take a cold shower or something. Do you want some help getting there? I think you’re like, dying or something.”
It was obvious in his voice that he was really freaked out by the way the troll was acting. Karkat begrudgingly pushes himself up into a sitting position, he has to reassure him. His head immediately swims at the familiar smell of Dave’s cologne. He puts his head in his hands and curses. He’s been dreading this all day. He can already feel himself gravitating towards his human matesprit.
“I….” His voice sounds foreign, he shakes his head. “I’m… Fine. I’m not gonna die, fuck.” He drags his legs up so that he could kneel, then crawls half way into Dave’s lap and mashes his face into his shirt, trapping him in a weird tight hug. He smells so good, and when he runs his hands along Karkat’s back he can’t help but sigh at the warmth blossoming between his legs. He buries his head in Dave’s stomach and rubs his horns into his shirt to give himself some sort of relief. Dave laughs, confused.
“Oh my god Karkat, first off, ow. Second.. Are you like... getting off on me right now?” Karkat tries to ignore the almost painful swelling of his bulge in his sheath. He chirrs sweetly at him, Dave’s scent has his body screaming ‘mate’. But Dave’s a human, he can’t pick up on the signs and pheromones like a troll would. Karkat has to tell him. Out loud. He can feel himself starting to cool down just by being pressed up against him, but it’s mostly due to the reminder that he does have a matesprit who he can pail. Oh God, he can pail him. He can’t help the small moan that rips through his throat as his bulge slides out into his shorts. His grip on Dave’s shirt tightens. His voice comes out in a pathetic whimper,
“Dave...” That should be enough to seal the deal, right? God please spare him. Dave’s eyes widen as he stares down at his odd behaving boyfriend. Then his expression softens and he rubs his back soothingly.
“Aw, Karkat, are you in heat?” Just the mention of it makes the troll’s nook throb, he buries his face in his shirt. He doesn’t want to say it, he doesn’t even want to acknowledge it. Another mating chirr escapes when Dave pulls him up and leans forward to press him down into the mattress. He’s on his back now, staring up into the gentle understanding gaze of his matesprit. His bulge lashes in his shorts, he swallows in anticipation. Dave removes his shades and smiles down at him,
“Hi.” Karkat can feel his face burning,
“Hi…” Dave’s smile shows in his eyes at the response, Karkat feels dizzy with need, god he’s perfect, the perfect matesprit. His human leans down to kiss him, which he accepts gratefully.
“You look as if you’ve already started without me.” Karkat doesn’t know what that means, he definitely hasn’t resorted to pailing himself yet surprisingly, so he shakes his head.
“No, I wanted you.. You look tired though, it can wait…” He ignores the distracting neediness between his legs and reaches up to tuck Dave’s long bangs behind his ear. Some of it falls back into his face, gravity. Karkat curses it silently. Dave makes a sad face,
“No, I don’t want to leave you hanging, dude. I’ll nap after.” So he is tired. He feels like an asshole. It’s obvious in Dave’s face that he’s displeased, he can tell when he’s berating himself. Luckily, Karkat has a solution.
“Lay back, let me do it.” He’s been resting all day, and now that he’s awake, he can’t help but become invigorated by the idea of riding Dave until he can’t move. “Please?”
Dave’s expression is still sad, but he relents, because he is really fucking tired. And he always wants to see Karkat’s heat-ridden sex face. It’s a win-win.
“Take it slow…” He slides off the bed for a moment to remove his jeans, boxers, and shirt, Karkat’s voice and behavior have definitely got to him. He lies on his back, guiding the small troll over him, his inner thighs shine and his bulge slides along his skin trying to gain any sort of friction. Dave’s definitely hard at this point. He hums as Karkat lowers his hips to slide his nook and bulge along the length of his dick.“Hmn… ”
Karkat’s responding moan comes out needy, he shakes at the stimulation such a simple motion gives him. He needs it now. He slides the entrance and lips of his nook along his dick more insistently, Dave rocks up against him.
He’s already becoming slick with Karkat’s natural lubricant. His nook tries to take him in along the shaft, but it only ends in a wet kiss-like motion, Dave groans. He rests his hands on Karkat’s thighs as he continues to slide back and forth until there’s little to no friction, just a slick, noisy, pink puddle coating his inner thighs and Dave’s lower abdomen. Karkat pauses, breaking Dave away from his mounting pleasure,
“C-can I..?” He sounds desperate despite asking so politely. Dave nods fervently.
“Yeah, fuck yeah.” He pants as Karkat raises his hips, there’s so much fluid between them. They’re going to have to throw out this mattress. He watches as his boyfriend takes his dick in his hand, rubs the head between the swollen lips of his nook, and slowly lowers himself onto it. The blush that spreads to the troll’s shoulders is pretty, and he whines as he bounces to take him in further. Dave lets his head fall back and takes a deep breath. Karkat’s always so fucking warm and soft inside, it’s hard not to come on the spot. He can’t help when his hips buck to stuff more into him, Karkat mewls and flexes his fingers on his abdomen.
He takes a couple breaths before breathing out, relaxing his pelvis and sliding down onto the rest of Dave’s cock in one smooth downward motion. He sits with him inside and shivers above him as his nook tries in vain to take more of him in. There’s fucking nothing to take, Dave’s big already, the fact that his nook wants more is frankly worrisome. It does help that Dave’s bulge is thick all the way through, it stretches his nook so deep inside, his body is tricked into believing he’s taken in a huge mate, very nice choice in mate for their bulge to be so thick, that’ll mean big strong wrigglers. Oh fuck he can’t breathe, he wants it so bad. He can’t take how good it feels, how right. He needs to catch his breath. Dave rests his hands on the small troll’s hips, rubbing up and down his thighs soothingly.
“You’re so fucking good, Karkat. So fucking perfect, god...You okay?” Karkat nods, eyes closed as he rolls his hips. It pulls a moan from both of them, Dave squeezing his thighs as he arches his back. “O-Ohh my fucking god I love you.” Karkat can’t even spare a moment to think about how he could tease Dave about his desperate pillow talk. He shoves his hips down hard, groaning as he’s able to hit that good spot deep inside himself. He wishes their bed wasn’t so cushioned, he can’t seem to press down enough. It frustrates him, but he doesn’t want to pull off so that they can relocate. He resolves to lean down and kiss his matesprit, nuzzling his neck as he slides back and forth slowly. His bulge is squished between them, he ruts hard against Dave’s pelvis to get more pressure. God he can’t get enough. He’s growing more desperate. He sits back up and bounces, chirring excitedly at the sensation the human method of pailing gives him. The nerves that are usually tucked away out of season are lighting him on fire with pleasure. He reaches up and swipes his finger around the tip of his horn, his nook attempts to suck Dave further in. He continues this, fondling his own horn in one hand while desperately slipping up and down the length of his matesprit’s human bulge below him.
Dave spits curses, grabbing at Karkat’s hips, thrusting up against him, trying to catch his bulge, and failing because Karkat’s moving too frantically. His eyes glaze over as he gives in to the fact that Karkat’s totally using him right now. God that’s so hot, and he’s like, still very tired. He’s gonna get the best damn sleep he’s ever had if Karkat keeps this up. He lays back and watches as his boyfriend takes over completely. It’s mesmerizing, the sweat making his skin glisten where the one strip of sun moves over him. When it occasionally swipes over his face and the light makes his irises and big red pupils look like blown glass. He’s so gorgeous. Dave has no idea how he managed to get him to fall in love with him. Karkat sits still on his hips with the whole length inside. He does that thing where he rolls his hips to emulate a troll fucking him. He says that’s not his goal, but it’s how Dave sees it anyway. It’s him being so warm and soft and tight that convinces Dave he’d rather not complain. Not if he loses this sensation.
Karkat’s brow is furrowed in concentration, sweat drips down the side of his face and his mouth hangs open as he pants heavily and moans. This time is different, he can feel it. Maybe he’s too riled up or something, but he swears he could feel the registration of Dave’s foreign material as precum beads from the tip inside of him. It makes him want him deeper, god, it’s always deeper and deeper, every heat gets worse. He wonders if he’ll eventually just have to stop seeking relief in order to save Dave the trouble of his mutant body going haywire. There’s this insatiable hunger for..for….
“C-cum inside.” He pants, grinding his hips against Dave’s to allow the head of his dick to rub right up against his chamber entrance.
Dave releases a startled moan, oh fuck, Karkat wants to- he nearly loses it then and there. The idea of his beautiful alien boyfriend, pregnant with his babies, babies that’ll be just as beautiful as their mama.
“Oh fuck, Kat. Yes. God yes.” This change of events gives him a surge of adrenaline, he flips them, hovering over his boyfriend. Karkat immediately latches onto him, trilling amorously as his nook sucks him in deeper. He throws his head back and cries out when the head of Dave’s cock pushes past his chamber entrance. He wants it so bad it hurts, the stretch is so fucking good.
“God Dave, ah.. Please-” Dave nods and leans down to kiss him,
“I gotcha baby” He pulls back only to shove in again, stimulating the tight sphincter of Karkat’s chamber entrance. Karkat squirms, borderline growling at the deep intense pleasure, he’s so so close. “Yeah, c’mon. You’re so hot, babe. Tell me how much you want it.” Karkat’s pusher hammers in his chest, his face feels so hot. Nooo, why does this make him so horny, it’s embarrassing. Dave wants him to beg!
And…
And he will… For Dave, he will. His matesprit, his… fuck, his first sire….
“I want it, I want it so bad, please give it to me god Dave please.” His voice and breath is rough with his purr, he’s purring so hard. He never gets this worked up, it’s startling. He’s so confused by what his body’s doing, his bulge has retreated, thick hot lube gushes from his nook like magma, pumped out as the pulsing waves become stronger around his matesprit inside him. His pan is so drunk on it all, it makes him feel so giddy, he’s being breeded. He hadn’t realized he’d been whining and mewling like a pailvid whore this whole time, he can’t control it, it keeps spilling out thrust after thrust. His natural feral concupiscent cries, he has to admit, he likes the sounds Dave’s forcing out of him. It’s not ugly like he thought it’d be, it’s kind of.. hot. This is hot. This is depraved. Sacrilegious. He’s not a civilized troll in this moment, he’s a mothertroll in heat who’s ignored his first two fertility cycles. Now his body’s acting as if he’s fucking the Empress with the way Dave’s dick stretches his chamber entrance. Humans are so great at pailing. Well, maybe not for a normal troll, but for a mothertroll like Karkat, looking for the biggest strongest mate to give him big strong wrigglers… He moans long and hard, seizing up as his nook’s orgasmic rippling forces Dave to finish abruptly with him, he squeaks as the human shoves himself deep into his genetic chamber to get as much into him as possible. It makes him so happy, he feels so wanted, Dave wants him to carry all of his wrigglers. He wants a full clutch all to himself. Karkat would give him a million if he could. He pants harshly, Dave‘s in the same state holding himself above him. They did it. Fuck yeah. Karkat’s going to be carrying a clutch of eggs this year. His first clutch. And he couldn’t have picked a better mate. He pulls the human down on top of him to mash him against his rumblespheres as he purrs in gratitude and satisfaction. Dave has no idea what this means to him, how sacred and valued this act is in troll society. How much things are going to change once everyone finds out he’s a mothertroll. He doesn’t care. He has Dave, and he’ll have his wrigglers.