The Black Book - AU - Locked to seaweed_writes

[ihadabadday]

He was lucky with his expertise he was able to find a job relatively quickly in a field he was familiar with. John looked down at his mobile as the alert came through. Christ. It was going to take him at least twenty minutes, if he was lucky, to get to the scene. But, he packed his things into the case and headed out.

He had been in Afghanistan for five years. First as a medic, then a doctor, and finally a hunter. He still was a doctor, but he had been assigned to an elite unit in the desert. Part of him felt a bit odd about all of it. But he didn't quite mind.

He made sure he had everything before he left.

He heard the annoyed voices, before he saw anyone as he entered the room.

"Oi. Who're you?" A man with two days of stubble and mussed black hair asked.

John paused and looked him over before his eyes landed on the gentleman in the suit with salt and pepper hair. There he was. "DI Lestrade? I'm Doctor John Watson, the new Occult Specialist, I just started last month." He gave him a smile, wanting to be nice, but not too friendly. People got jumpy around the occult. He saw it all the time in Afghanistan, and even here in London.

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[seaweed_writes]

"Nnnng... J-j-ohn.... " Sherlock groaned and rocked against the sheets. He knew he shouldn't and it was still not even close to enough to actually get him off, but it was something.. ANYTHING.

"S-s-ir.. p-p-please.... I.. I need a c-c-cock inside of me.. PLEASE.." He moaned out and rocked his hips again, trying to get John's three fingers deeper inside of him.

"I need a cock... the dragon, you.. just something.. pleaaaase.." He begged.

[ihadabadday]

John pulled his fingers out of Sherlock and then moved over to the chair. He made sure his mate was watching as he attached the dildo to it. He then took the tip in his mouth and gave a gentle suck.

He pulled off and grinned at his lover. "Then you need to come over here and ride this gorgeous cock."

[seaweed_writes]

Sherlock groaned at the removal of John's fingers. No matter how many times they do this, how many times John stretches him and then pulls out his fingers, and Sherlock knows something good is coming afterwards, it still makes him feel hollow and empty.

"Nnnng.." Watching John fellate the dragon dildo was much more arousing than it should have been. He knew he wasn't even open enough for John, much less the larger dragon dildo, and this was going to hurt.

A lot.

And he didn't even fucking care. He wanted it anyways, craved it like a drowning man craves air.

Eagerly, Sherlock got off the bed, his cock jutting out proudly in front of him- flushed and leaking- and walked over to the dildo. It was intimidating. He had only taken it once before and it had left him gaping and sore and walking funny for a couple of days.

But he didn't hesitate. He took some lube- no way he'd do this raw- and almost soaked the dildo in it. He was gonna need all the help he could get. While he slathered the lube on, he stroked it, with one hand, then two, acting like he was trying to jerk it off.

When the dildo was ready, Sherlock straddled the chair and looked over to John, and then started slowly, every so slowly, to move down, and let just the tip slip in.

"Ahhhh... fuuuuuuck..." Even the tip was wide, pointed but flared, and it stretched him from the very start.

[ihadabadday]

John settled on the bed, shifting from human form to demon form. He grinned as he watched Sherlock.

While the idea of directly causing his mate pain still worried him... This indirect route thrilled him. Especially when he saw how much Sherlock wanted it. Loved it.

"Look at you..." he purred proudly, "You're taking it so well. You love being mounted by a beast bigger than you, don't you my love?"

[seaweed_writes]

Sherlock watched at John changed to his Demon form. Of course Sherlock thought both of John's forms were sexy, but he had a thing for the more bestial Demon form.

"Mmmmf.. Y-y-y-es... I... d-d-o.." And he did. Well, in theory at least. He had never been able to put that into practice. Even for Vampires, there are some things that are more taboo. And fucking or being fucked by a beast, any type, was.. frowned upon.

That didn't mean that he didn't want to do it, though- get fucked and used by something, be its playtoy, its hole to fuck into. Just the thought made him groan louder.

"AHHH....." He'd forgotten how fucking big this dragon dildo was. He was only a few inches down and already it was widening, it was wider than John, and he had a lot more to go. Tears leaked from his eyes and he bit his lip, It hurt. but it hurt so good, and he continued to press down, taking more and more of that dragon inside of him.

[ihadabadday]

"You're doing so well, taking that giant cock. I'm so proud of you, my good boy." John praised. He leaned back slightly and began to stroke himself slowly. He had been rather horny lately, wanting to fuck or be fucked. Of course Sherlock had been treating him gently. Which he understood. Neither of them wanted to put the child inside him at risk. But once he healed from the birth...

He shivered as he continued to stroke himself. "Oh yes.... I'm thinking of your mouth on me, me filling your belly with my semen and piss. You drink anything I give you..."

[seaweed_writes]

Sherlock practically preened at those words- my good boy. But god, seeing John stroking that giant Demon cock of his, it just drove Sherlock wild. It always did. He knew he'd been handling John with kid gloves lately. But he was worried- both for his lover, and their baby that grew inside of him. Every day that it got inside was one more day that it could grow stronger.

"Mmmmmf... J-j-jooohhhhnnnn.." It was a pleading sound. Yes, yes he would drink whatever John would give him. They had played around with piss a little bit since that first time, but Sherlock never pressed, he let John dictate when he was in the mood to do that.

"Yes.... yes... aa-anything.. everything... OHHHHHH..." Sherock shut his eyes and grit his teeth as he went past a flared part of the dragon cock. It was not straight down, it had a curve, and ridges, and a swollen part, almost like the knot of a canine- not that he had ever taken one of those, but he had seen.

It was so close to too much... He had to slow for a moment and use more lube, and then, finally, he felt that dragon's knot slowly slip into him- the very widest part of the dildo was inside. But he still.. STILL wasn't quite at the base yet.

[ihadabadday]

John groaned when he saw Sherlock take the dildo. The knot. Goodness he was gorgeous. He groaned as he rubbed the tip of his cock. He couldn't wait to have Sherlock use him and wring everything bit of pleasure from him. Once the baby came...

He shuddered and moved his hand down, stroking. "Good boy. Taking the beast's cock so well. Do you know why it knots?" He pressed on, not expecting an answer. "So it can breed it's bitch. I wonder what you smell like to the dragon to think you're a bitch in heat..."

"Maybe for our anniversary I'll find a real beast to fuck you pet. See you turned into nothing better than a glorified hole. Or put you in a room full of holes so men and creatures can shove their cocks through. For you to suck, to get off..."

[seaweed_writes]

"Nnnnngg.. Johnnnn.... " John had teased him a few times, about passing him around to other demons, to have Sherlock used as repository for whomever wanted to fuck him or come on him, and now to find an actual beast, maybe not a dragon- he'd just be food- to breed him and knot him and have its way with him.

But when John had become pregnant, all that had fallen by the wayside, and now Sherlock found himself craving it more and more, to be used and made sticky and stretched and thoroughly debauched.

"P-p-please.... J-John.... Wanna.. b-be fucked.." Yes. Yes, he wanted to fucked by a beast and feel how a real knot stretches and widens inside of him so that come stays inside while it fucks him and breeds him..

It was almost enough to send him over the edge, so he stopped, and held the base of his cock, sweating and panting and dripping a puddle on the chair and dribbling down off the chair to the floor. He was almost fully seated, but he had to stop a moment so he didn't come here and now.

He had to be a good boy for his Sir.

[ihadabadday]

John got up carefully and made his way over to where Sherlock sat. "I need you to suck my cock pet. Don't worry, I'll have enough for your hole too." He promised stroking his hair.

He shivered and then continued stroking himself, putting on a show for Sherlock.

Once he was healed... He was going to give Sherlock every fantasy he wanted. Anything and everything. Beasts, maybe a hound of sorts. He'd have to buy a breeding stand.

[seaweed_writes]

He nodded his head, then opened his mouth eagerly for John.

"NNNNNFFFF..." And that was it... he had the dragon seated fully inside of him, ridges and curve and knot and all. He was still gripping at the base of his cock, though the pain had softened him a little bit, the desire and the need were still there. He had to sit still for a bit, and let his body try to stop throbbing from being opened like he had only one time prior.

So he watched John continue to stroke himself, while he licked his lips and opened his mouth and somehow managed to stammer "Y-y-yes, S-s-sir."

[ihadabadday]

He pushed his cock between Sherlock's lips and groaned softly. His fingers curled into his hair and pulled his head down onto the enormous length.

"Fuck you're brilliant. So slutty and all mine." He groaned, eyes closing. John began to rut slowly into his mouth, being cautious of his expanded belly.

[seaweed_writes]

Even if Sherlock had wanted to respond, he couldn't with a mouth full of Demon cock. He had been getting better about taking more of it, but it was still simply too much for him to take all. Still, if he was positioned right so his cock would slide straight down his throat, he had been able to train his gag reflex and he could take a good bit of that monster cock inside.

If his cock had been a bit soft before, it was hard and leaking again now. He couldn't move much of the dragon dildo, he was pretty stuck on the knot, but it was enough that he could still fuck the bottom part of it while John fucked into his mouth.

He closed his eyes and made a "MMMMff.." noise. Being taken from two holes at once was something they had done, but never with something as big as a dragon dildo. It was always a much smaller dildo, smaller than John's Demon cock. So this was new

And fucking amazing.

He had no idea if he could last long like this, and with JOhn's massive cock in his mouth and down his throat, he had no warning, so he knew he had to be careful and make sure not to come too fast.

[ihadabadday]

John groaned as he rocked his hips back and forth, rocking his cock in and out of Sherlock's mouth. He shivered and yanked Sherlock's head down further. "One day you will deep throat me pet. I want your lips pressed against my pelvis, my pubic hair tickling you."

He pushed his hips up more, trying to get his cock down more of Sherlock's mouth and throat. "What a sight it will be, you filled to the brim with me."

He reached down with his free hand and pinched a nipple.

[seaweed_writes]

Sherlock nodded his head the tiny amount that he could, making another soft noise that John could feel as his throat vibrated. Yes. He wanted to be a good boy for Sir. He wanted to take every single little bit of that cock inside his mouth and down his throat, and feel John's sandy brown pubic hair tickle his nose.

His eyes went side and he made a noise around John's throat when John pinched at his nipple. He quickly tightened his grip around the base of his cock and made a whining noise, slowing down at fucking the dragon dildo a bit He had almost come again- that was the second time. He wasn't intending to, but he was taking himself to the brink and pulling back- orgasm denial. He knew that would make the orgasm when he finally did come even more intense.

But he was a good boy. Sir hadn't told him he could, so he didn't. He paused for a moment, letting his body once again come back from the breech.

[ihadabadday]

"You know. You look so gorgeous speared on my cock." He praised, "And you're doing so well riding that dragon. And you can come however many times you want. I'm going to keep fucking your mouth until I'm satisfied." He rocked his hips forward again, groaning.

"Such a good hole you are. I love seeing you so desperate. Such a slut." John thrust further into Sherlock's throat as he climaxed.

[seaweed_writes]

There wasn't even time to beam at the praise that Sir was giving him. John rocked forward, Sherlock felt the twitch of his cock, and he just had a second to think about what that meant before John was coming down his throat, which did cause him to choke a bit and have to pull back. He couldn't take John deep and swallow his come and breathe. It was physically impossible, as much as he wanted to.

He moved back until John was only in his mouth and swallowed what he could. There was way too much for semen for him to swallow it all down. It was leaking out of both sides of his mouth, down his chin and neck and down to his chest.

"Mmmmmmffffff!!!! It was all too much for him. He slammed himself down onto the dildo again and let go of his cock. Immediately he screamed out as he came, thick, hot ropes of his own come splattering on John's legs, on himself, the chat and the floor.

[ihadabadday]

John pulled back as he was still coming to make sure it got on Sherlock's face and his torso. He wanted to coat Sherlock in his seed.

He grinned at his vampire. "Do you want more pet? He asked, "do you need more in your hole?"

He pressed the tip of his still hard cock to Sherlock's lips again.

[seaweed_writes]

Sherlock sucked in great breaths of air when John pulled out of him, which meant that while John was coating his face, he got even more come in his mouth, which of course he eagerly lapped up. He was covered in come, between John's on his face and in his mouth and now on his body, and his own on his hands and between his legs, now leaking onto the exposed parts of the dragon dildo as well.

His own orgasm seemed to last a lifetime. He couldn't even try to answer John until it had finally faded and he was able to breathlessly nod his head. He tried to say "Yes, Sir" But it came out as a breathy gasping moan more than anything else, so he nodded again.

He would take whatever John could give him, as much as he would give him.

[ihadabadday]

John smiled. "Take just the head into your mouth." He ordered.

He shivered when he felt those lips close around the head of his large cock. God. It felt good. He was sensitive after an orgasam.

He licked his lips and took a breath. He needed to come down from the high, let himself relax. He loved this part of Sherlock, the fact that the vampire trusted him so.

John let out a sigh as he began to piss, letting it fill Sherlock's mouth.

"You'd better swallow every drop pet." He ordered.

[seaweed_writes]

Sherlock nodded and did what he was told. He opened his mouth and took the thick head into his mouth. In his Demon form, even just the head filled his mouth well.

He groaned when he felt the hot liquid start to fill his mouth. It shocked him for a moment, then his instinct took over and he started to suckle at the head, his lips forming a seal around it so he could drink it all down and not miss a single drop of it.

His cock was starting to harden again, his prostate was being milked mercilessly. It was just on the verge of too much- too much stretching and too much sensation for his overly sensitive prostate and his now wrecked and stretched open hole.

And still he drank, being a good boy for his Sir, taking anything John would give him.

[ihadabadday]

There wasn't as much as normal, due to the fact that he was using the bathroom so frequently because their child was pressed against his bladder.

John pulled out when he was finished and grinned.

"Good boy pet. Now do you want to ride your new friend again? Or should I put you on your knees and shove my cock in your wrecked hole?"

[seaweed_writes]

When John grinned, Sherlock grinned as well. He was a good boy and Sir was proud of him. He licked his lips, tasting come and piss and sweat.

It was perfect.

There was never any doubt what Sherlock wanted to do. He would always ALWAYS choose John over any other choice he was given.

"I... w-w-want... Sir.. to.. u-use me..." He managed to stammer out. He was on another plane, some heady mix of pain and pleasure and over stimulation driving him deep into a place where it was hard to get out of. He was honestly surprised he could even speak.

[ihadabadday]

John nodded. "On the floor pet." He ordered. Once the instructions had been obeyed, he carefully went to his knees behind Sherlock. He ran his hands over the globes of that gorgeous arse and then spread the cheeks.

"Look how open you are..." he purred, "I bet if I wanted I could put my fist in you. Or you could take three cocks. I do love seeing you stuffed so much. So full."

He didn't wait for an answer before positioning himself and pushing in. John gasped and then began to thrust in and out.

[seaweed_writes]

Sherlock grunted and strained past the knot, which came out with a slurping pop. The rest of the dildo slipped out rather easily, in a loud, messy slurping nose and a rush of lube- Sherlock had used most of one small container just to get it inside of him.

When he tried to stand, he found that he couldn't and he fell to his knees anyways. His legs were weak, his arse was still leaking more lube.

"Mmmgggg.." Sherlock couldn't speak any more. He was too deep, too lost. He could feel how open and leaking he was. He heard John, but he couldn't respond, just a soft nod. He was a mess, covered in come and lube, and full of come and lube and piss in his mouth and throat and stomach.

He could feel John press inside of him, and he was so wide open and full of lube that John just slipped inside with almost no resistance of all.