Chapter Text
"Seth, you gotta promise me you won't use teeth."
"Now what would ever give you the idea that I'd go and do something like that?"
Dean rolled his eyes before closing them, shivering at the feel of Seth's tongue licking up the underside of his length, before letting out a breathy laugh at his reaction, causing a chill to make its way across Dean's cock.
"Stop teasing me, you know exactly what the fuck I mean."
Seth looked up innocently at Dean, who was staring down at him with blown eyes and sweaty, wild hair. He wrapped a hand around Dean, stroking him languidly, while crossing his fingers on the other hand and placing it over his chest. "Cross my heart, I will not use teeth while sucking your dick."
Dean nodded slowly, noting the caveat to Seth's oath. Seth had a tendency to bite during sex, which he didn't usually mind, because the little bit of pain worked for him, set off sparks in the back of his brain that only strengthened that burning urge to cum.
It's just a bit harder to deal with when the person you're fucking has fangs.
Dean had asked Seth when did it happen, and Seth brushed it off, didn't want to talk about it, and Dean had his suspicions on who did it, but that didn't matter, because what did matter was Seth finding some way to make Dean's pulse quicken before biting down. He was scared at first, fuck, his boyfriend was a fucking vampire, and that is shit you do not expect to have to deal with, since, y'know, they're not supposed to goddamn exist.
But, well, here they were.
With Seth grinning up at him, blonde and black hair falling as a curtain around him, eyes dark and mischievous, and him dragging his tongue across his fangs before licking at his bottom lip.
Dean figured worse things could happen.
"Alright. You promised."
"I did."
"Well…go on then."
Seth closed his eyes, laughing and shaking his head, knowing a lot of this was still Dean's hesitation. He didn't blame him, if the roles were reversed, he'd probably feel the same way. He had his own ideas in his head about what he'd want to Dean to be like, but those thoughts went out of his head the moment he wrapped his lips around Dean, swallowing him down bit by bit with each slow bob of his head, humming in appreciation when he felt Dean's thighs tense under his hands.
He rubbed his hands gently up and down Dean's thighs, before feeling Dean's fingers thread slowly through his hair, grabbing hold and pulling gently, a sign for Seth to look at him. He looked up at Dean, who had a blissed out look of adoration and some shade of fear on his face, cautiously appreciative of Seth sucking his dick. Seth reached a hand towards Dean, and when he grabbed his other hand, he looked back at him, hoping he was expressing the need for trust as well as he could.
"Yeah…ok…" Dean whispered, but whether that was to Seth or to himself, neither of them knew. But soon, he had leaned his head back, eyes closed, as he pushed at Seth and gently thrust his hips up, trying to take some control of the situation. Seth allowed it, letting Dean push into his mouth harder and faster as time progressed, gritting out between harsh breaths that he loved to see Seth suck him.
That was answered with a quick glimpse up at Dean and a quirked eyebrow, as if to say really now?
Soon, Dean was pulling on Seth's hair just a bit too much for Seth's taste, and when he dug his other hand roughly into Dean's thigh, the pain made Dean's body jerk, which pushed him further into Seth's mouth. Seth almost forgot that Dean had a masochistic thread in him, but he remembered now, and that was key.
He slid his mouth off of Dean's cock, sucking at the tip before moving his lips to Dean's thigh, wrapping a hand back around him, tight and firm, no more teasing to his touch.
"Fuck…why did you stop?"
"Because I said I wouldn't use teeth while sucking your dick."
"And? You weren't…fuck…" He thrust into Seth's hand, his breath becoming a bit more labored.
"You're right. I wasn't. But I want to use teeth, Dean…"
All that Seth could hear as he started to kiss the inside of Dean's thigh was a low groan, and Seth couldn't help but chuckle as he licked at a healing bite mark from a few days prior. The shiver that coursed its way up Dean's spine was the exact reaction Seth had been looking for.
"That's it baby… get yourself all nice and worked up for me. I'm going to let my hand go, and I want to watch you make yourself cum. Ok?"
He had barely let his hand go from around Dean's cock when he felt Dean's hand brush his, before he moved to trace his nails down Dean's thigh, watching with delicious amusement at what was before him.
He could see the muscles in his body tense and release, how Dean twisted his hand at the head of his cock with every stroke, his other hand clawing for purchase against the back cushion of the couch, and most importantly, he could hear the sound of skin against skin, the sound of uneven breathing, and that beautiful, delicious sound of pumping blood.
Seth couldn't help but feel himself throb a little, but the concerns of his own cock were second to his thirst. He could always make Dean suck him or something later, what he needed to do was taste both sides of that orgasm, both of them warm on his tongue and down his throat.
"God, fuck…Seth, fucking please…"
He knew what Dean wanted, but he needed to hear it for himself.
"Go on baby…tell me, what do you need me to do?"
"Fuck, just….bite me, please."
He could tell he was close, but he needed just another push before it would be at the right moment.
"What, like this?" He bit gently with no fangs; enough to cause pain but not enough to give the sharp sting that Dean was looking for.
"No, fuck, you know what…oh fuck, Seth, please please please, I'm gonna…"
And before Dean could finish his sentence, Seth had bitten down deeply, fangs puncturing skin, groaning in time with Dean as he came hard, spilling onto his hand and stomach, while his blood coursed, hot and full of adrenaline, into Seth's mouth.
The last aftershocks sputtered out of him, and Seth broke his mouth away, licking once over the marks before lapping at Dean's hand, sucking his fingers into his mouth one by one, sucking gently over the now sensitive head of Dean's slowly softening cock, and finally licking in broad stripes at Dean's stomach, making sure to get every last drop.
Dean's eyes were closed, his chest rising and falling harshly, a low groan emanating forth as he felt Seth kiss at his neck gently, before kissing him on the lips. "You're going to kill me one of these days, you know."
"I would never."
"I know you wouldn't."
"But it's probably a bad time to ask about if I can ever get you on the neck, huh…"
Dean lazily lifted a hand to swat at Seth, who climbed off of him laughing, wiping at the corners of his mouth, as he let Dean finally succumb to sleep.