Rind.

Kellanar went to him slowly, reverently, with caution and due fear; he was a penitent kneeling at his new mate's throne. Gus stirred, hearing him approach; his breath quickened.
"It's alright, human."
Everything sounded sharper to Kellan now; his own voice boomed in the room. He wanted to whisper. Gustin's heart beat erratically, out of time with his emotions and his excitement. A haze of interest rose towards him, filtered in through his nose to the back of his mind. His wolfe scratched at the ground. Kellan stood beside the bed.
Gus did a quick inhale, then:
"I mean, it's not as if I've never done this before." Kellan furrowed his brow. Leave it to the human to talk at a time like this. Ruin a beautiful silence, that one could. He decided to just snort in return, which seemed to relax Gustin more than his words before had. His heartbeat slowed, scent thickened.
"I'm just saying. So you know."
Kellan placed one hand on the pile of furs, began to climb onto it lengthwise.
"So I know what, human?"
"That I'm not afraid."
Kellan paused, flexed his haunches. The wolfe sniffed.
"Scent says different."
he placed one hand on Gustin's side. The human turned to look at him; his face was unreadable in the dimming light of just the fires in their pits and no lanterns lit.
"Scents lie."
Kellan watched him for a minute, letting his eyes sharpen to take in the features. He read worry.
"I won't hurt you."
Silently, he prayed to the goddess that he would not. Outside, the moon was rising.

It hadn't started yet, but it was getting closer, like an encroaching beam. Kellan told him it would be best not to wait; best not to force it into existence. He'd rather the first time be easy. Gustin nodded, couldn't find the words to agree. Why did this feel so weird? He'd been in this place in a dozen beds a dozen times before - why did his heart pound now? Why did the air feel so heavy? Breathing was a chore. Moving brought him into closer contact with Kellan, who was now above him, raised on both arms, poised perfectly and waiting. Gustin kissed him first; Kellan complied, went easily into the embrace although Gus had been told before it was unnatural to the wolfish to do it. He released, needing space and air, and Kellan moved away in perfect time. How had a life in the woods taught him to be so elegant? He wanted to talk. By the moon, he had to talk. The silence made his heart beat faster. He couldn't do this. He couldn't make it happen. Kellan would have to do it, Kellan would have to show him where to go because for the past however-long-he'd-been-here, Kellan had known exactly what to do. He needed Kellan to be there now.
"This is - I mean, it's hard, you know, I just - " Fuck all, where had the smooth-talking Gustin gone? He hardly knew himself at all. This was a new Gustin - this was nervous Gustin, worried Gustin, sentimental virgin Gustin. He needed the other guy back. Gus swallowed and tried to finish his thought.
"I - you need to...I mean, listen, I - "
Kellan kissed him again, deeply.
"I understand, human."
He glanced outside. Nightfall. Kellan kissed him once more, quickly, then he was dipping his head to Gustin's neck to take in his scent, and he lingered there for a moment, tonguing the cave of Gustin's collarbone, until the human squirmed and he moved on. He dipped his nose down, towards Gustin's chest, encountered the barrier of indoor clothing, grunted and lifted Gustin to strip it off, pushing agitatedly at the pants, too. Gustin complied, quietly, and kicked them off into the dark. Then Kellan was laving his skin, nipping here and there, but mostly just licking a path down his stomach, and Gustin was sure he was going to stop, but he didn't and suddenly it felt really warm and extremely good, and Gustin looked down to see Kellan's mouth wrapped around his cock, and the wolfe grinning easily up at him. Gustin was hit immediately with a wave of fuck-yes, and Kellan urged him to lie back and began to suck, wrapping his long tongue around the head of Gustin's cock, teasing the slit as he did so. Gustin hadn't been sure he was going to be able to get hard before, but he had no such qualms at the moment. Kellan was laving his balls, one hand wrapped firmly around Gustin's dick, and the human swore he saw stars. Then Kellan was drawing him back into his mouth, tongue tickling the underside of his cock, one hand caressing his balls and the other working a steady tense-release pattern on his thigh. Kellan moved and Gustin saw the muscles shift in his back and realized how much tension and strength the wolfe was holding in. Then Kellan's suction
got even harder and the hand that had been caressing his thigh slipped around to finger his ass, and Gustin was coming in hard, unrestrained streaks down Kellan's eager throat. Gus sucked in breath harshly for a moment, the loudest noise he'd made so far. Kellan sat back on his heels, wiped his mouth with one hand, the other back to rubbing Gustin's thigh. His eyes had lightened from brown to gold, reflective in the lowlight. The wolfe was not sated. He blinked, and Gustin, sitll basking in the afterglow, became a little more aware of exactly what he'd gotten himself into. The glow faded a little, but not much and Kellan shook his head as if to clear it then two strong hands were flipping him over, onto his stomach on the bed. Kellan's hands worked his sides for a moment, massaging, pulling him back to get him where the wolfe wanted him. Gustin swallowed and tried not to think about it; he was open and presenting as if the heat were his own.
Kellan growled. Gustin jumped. Kellan slapped his ass, hard, in response, which Gustin correctly took to be a warning. He steadied himself and tried to focus on being still. Kellan was sniffing him again, only this time in much more humiliating places and he wanted to move, very badly, but then Kellan's tongue was back and he figured he might as well just stay as is. He was half-hard in a second, and Gustin reflected that this was the fastest he'd ever been ready again since he was just a kid. Kellan licked at his ass, swirled his tongue there, Gustin realized, in preparation, and his heartbeat picked up again. Kellan pulled away, just for a second, and then it was happening, fast and hard and so much better than Gus had ever expected. Kellan was thick, but practically dripping with his excitement and Gus only bit his lip for a second in surprise before the wolfe was halfway in. The wolfe moved a little inside him, and Gus groaned quietly, unprepared for it. Kellan nuzzled his back, licked at his shoulder to calm him. Easy, he reassured himself, and in seconds, the pain was gone and Kellan was moving again - perfectly timed, perfectly attuned to Gus' body. Kellan's thrusts were short at first, testing his mate. Mate. The moon was peeking in the window. Gustin spread his legs wider, invited the wolfe in. Kellan's thrusts lengthened - his cock slid in and out of Gustin, hilt to head, again and again. On one thrust, he bumped Gustin's prostate accidentally and Gustin gasped out loud; liking the response, he hit it again and again until Gustin was just on edge. Then the wolfe stilled and something felt different and Gus realized that his impossibly large cock was growing impossibly larger still, and he tried to move to test it, and Kellan growled with real menace.
"You move, get hurt."
Gustin frowned, held quite still. Kellan's voice sounded weird; gravelly and confused.
"Let knot fade."
Gustin bit his lip. The feeling of being full got more intense, until the pressure seemed enormous inside of him, and all the time, Kellan was licking him, nudging his shoulder and with one hand, massaging his side. The pressure was becoming more painful. Gus bit his lip harder to keep quiet, tensed his fingers in the furs. Kellan scented his distress, but could do nothing to assuage it besides kiss his mate and keep him calm. Then there was real pain and Gustin yelped and Kellan groaned and kissed his neck and released inside of him, shaking a little as he did so. The pressure decreased immediately, and Gustin exhaled in relief - at least the first one had been quick. He waited for the swelling to fade completely, but it didn't, and Kellan didn't pull out, either - he stayed thick inside of him instead. Gustin waited, one breath, then two, and suddenly Kellan began to thrust into him again, this time with a reckless force that sent his head down to his forearms. The going was much easier now, post-knot, and although Kellan seemed to have become unconcerned with Gustin's gratification, he found himself soon on edge again. Kellan's thrusts were strong, but had slowed a little and were not so vicious as the first, and Gustin was just beginning to gain some quarter when the wolfe's teeth bared and were sinking into his right shoulder, straight, he imagined, to the bone. Gustin cried out in surprise as the wolfe came hard inside of him and his own orgasm overtook him like a wave.

Kellan thrust minutely inside of him for a few seconds afterwards before pulling out completely and releasing the bite. Gustin whined at the dual removal, jumped to his feet, out of the bed. The chill of the wood floor hit him, but it felt diminished after the exertion.
"You bit me!"
Kellan looked a bit dazed.
"Sorry, human."
"No! No sorry! You said you wouldn't hurt me and you did - you bit me!"
Kellan was on his back, arms slung out, looking wholly unconcerned with this.
"Huh."
"Kuskellanar!"
At his whole name, he lifted his head.
"Tell me now how much danger I am in. I wasn't aware that biting was part of it."
Kellan shook his head and rolled onto one elbow.
"Sorry, human. Mark won't hurt you. Urge came - don't know why. Wolfes don't usually mark their humans. Felt the pull for you. Something special about you, human. Think maybe it was the moon. Had to make you my mate, mark you for her."
His piece said, he collapsed back onto the bed. Gustin stood, stunned, by the fire. Every time he thought he'd got a hold on things, somebody threw him for a loop.