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]

"Mmmf.... RRRRGG!!!" Sherlock bit down harder. His whole body stiffened and he thrust hard enough to push them both forward as he came. he came and came, deep spurts of his seed inside John's already gravid body.

Sherlock thrust over and over, a little softer each time, until he was spent, and he lay on top of John, now licking at the two small wounds, and staying inside John while his cock softened inside.

[ihadabadday]

John lost control and his human form faded into his demon one. He shuddered and stretched his wings wide.

"Oh... Don't stop." He begged. Though he wasn't sure what he was begging for. Over and over. John clawed at the bed, trying to be careful with his nails.

[seaweed_writes]

"Nnnnfff." It was far from the first time that John had turned into a demon while Sherlock was inside of him, but that didn't make it any less strange to feel that magic shifting around him while they were still connected.

He felt the whoosh of air and the brush of the wings against his hair and cheek. Was it possible that John felt tighter around him? It should have been the opposite, but Sherlock could have sworn that John was tighter now.

Sherlock had never really gone fully soft, though he had almost slipped out of John as his cock had softened somewhat, but feeling the power and the magical energy under him and hearing John beg, he pulled out and stroked himself back to full hardness in just a couple of minutes, the he took his cock and pressed it against John's entrance, still leaking come from the first time.

"Don't stop.. this?" He asked, and pushed back in, all the way with one hard thrust and a grunt of exertion.

[ihadabadday]

He muffled his cry into the bed as Sherlock pushed back into him. Oh god! John knew Sherlock was feeling a touch smug from getting him pregnant. Again.

But he didn't want it to stop. He wanted Sherlock to use him and use him.

The mere idea that they could get lost in one another...

[seaweed_writes]

As much as Sherlock wished that John didn't have to muffle his cries, there was a child in the flat. Sure, he was upstairs, but the walls were pretty thin, it didn't take much for the sound to travel.
And John tended to be pretty vocal- something that Sherlock absolutely adored.

The pounding was fast and heavy and relentless. He could already feel another orgasm blooming inside of him. He held onto the Demon for all he was worth, nibbling and biting at his neck and down his back and even at the base of his wings as he thrust harder and harder.

"Nnng... you.. want me... to come again.. d--don't you.. fill you up and keep bb-reeding you.."

[ihadabadday]

John wrapped his tail around one of Sherlock's arms to keep him close. Close. He wanted the vampire in him, always. Taking him. He shuddered, his own body tight. He hadn't reached his climax yet, wanting to wait for Sherlock. Or something...

"Please..." he gasped, "Don't stop. Please. I need you."

He was spiraling down and down.

[seaweed_writes]

It never ceased to amaze Sherlock at how John could use being a Demon to his advantage. He had wings to wrap around and horns to hold onto and a tail that was practically prehensile. He could use them all, and they could also be used by Sherlock to his advantage.

Especially the horns. He loved holding onto those.

But this time it was John pressing the advantage, using his tail to his own advantage.

"I'll never stop.." He grunted through his teeth.. "Can't stop.."

Sherlock felt himself building and building until...

"NNNNGGGG!!" He thrust hard again, biting down at his back not to feed but just to hold on while his second orgasm hit him like a freight train He rode it out, thrusting with each pulse of his seed inside of John until he was spend again, panting on his back and still miraculously inside.

[ihadabadday]

John groaned as he felt Sherlock fill and fill him. He shivered and let out a breath. His mate was amazing and... Amazing. He turned his head to the side to take a breath. His own cock was hard and leaking against their bed. They'd have to change the sheets before they went to sleep.

He shifted a bit, keeping his tail wrapped around Sherlock's arm. "You feel so good in me..." John managed. Sherlock had just fucked him silly, twice.

[seaweed_writes]

Sherlock went from biting at John's back to licking and kissing at his sweaty skin. With the slight movements, his now soft cock slipped out of John.

"I'm going to need a few minutes before I can try that again." Sherlock smiled, still staying behind John, but now starts to use his hands to rub up and down his sides, his thighs, almost everywhere except his cock.

"Do you want to come now, John, while I catch my breath?" He asked, barely brushing a finger over the very tip of John's cock, just a tiny little ghost of a touch.

"It seems almost unfair that I have come twice, and you not at all."

[ihadabadday]

"No..." John shook his head, "No. I don't want this to end." He was worried if he came, that would be the end of it.

He stretched under Sherlock, pushing his hips back and reaching forward with his wings spread. His tail still held onto his mate's arm.

All of this was perfect. Wonderful. He shuddered and took a breath.

[seaweed_writes]

Sherlock chuckled. "It wont end if you come, you sexy Demon." Sherlock rubbed his other hand up and down John's tail. "Of course, it will mean the end of these sheets, but I think that's already a given."

He looked under John and licked his lips and groaned. That huge Demon cock was leaking copiously, probably more than Sherlock had even come twice. "Fuck." He groaned. "That cock of yours..." He knew he wanted to try to beat his record of fucking John but damnit, that cock. It felt amazing to be speared open by it and filled to overfull by all the come in those large bollocks of his.

[ihadabadday]

John whimpered and pushed back towards him. He ached and wanted. He felt himself spiraling down and down. He wanted nothing more than to please Sherlock. Make the vampire happy. He shuddered and moaned into the pillow.

"Any... Anything you want. I'm yours." He whined.

[seaweed_writes]

Sherlock leaned in and whispered in John's ear. "And I'm yours, my love." He punctuated it with a kiss to the shell of his ear.

"And right now, I want to know what YOU want." He kissed again. "I'm so happy. You're carrying our child again. I want you to be happy. I want to show you how proud I am of you and how happy I am and how much I love you. "

[ihadabadday]

John sobbed and shifted a bit. "You. I want you." And he did. He always did. He wanted to be with Sherlock and love him and cherish him and... And...

He shuddered and grabbed at the sheets. "Please... I want you."

[seaweed_writes]

Sherlock licked at John's ear. "You have me." He whispered softly. "You have me for the rest of our long lives." He adjusted himself until he was rubbing the head of his cock against John's entrance again.

"Is.. this what you want my love? My pregnant love, my gravid mate?"

[ihadabadday]

"Please... Yes..." he begged, "Please. I need it. I need you. Please...." John was lost in the pleasure, just focusing on it, what it felt like to have his mate inside him over and over. He shuddered and tried to pull Sherlock closer. Closer. Please.

"Yes. Sherlock. Please..."

[seaweed_writes]

"MMmmm.. Johnnnn.." It only took a few strokes to get himself hard, and then he was pushing in for a third time. Sherlock know that he wasn't going to have neat as much to give when it came to filling John, he just didn't have as much as the Demon could give, but that didn't mean that he couldn't make it feel really good.

This time though, he was slower about it. Less frantic fucking and more like making love, worshiping John while he moved in and out much slower than before.

[ihadabadday]

It was slow and it made his head spin. What a wonderful feeling. The sensation of Sherlock rocking in and out of him in this way. He moaned and just held on, letting himself take in every thrust, every touch.

He knew the next months were going to be hard on all of them. But in this moment, it was just the two of them, against the world, like they had promised.

[seaweed_writes]

"John, Johnnn.." Each time he pressed into his mate, he groaned the man's name, like a prayer. Slowly, he started to increase his speed and the power he put behind the thrusts, but it was still slower than it had been before, like he wanted to keep it going for as long as he could. He was quite aware that John still hadn't come yet, and he was working towards his third orgasm.

"Let me touch you... please, John. I want to hear you come apart under me." Fuck, the Demon was so sexy. He loved his lovers true form. Well, he loved everything about JOhn, really.

[ihadabadday]

John was spiralling down and down and he just couldn't hang on anymore. He felt like he was going to plummet down and down.

He moaned at the slow thrusts. Over and over. It was beautiful torture and he didn't want it any other way. John sobbed and clawed at the bed.

"Daddy..." he gasped, "Whatever you want, I'll give you whatever you want."

[seaweed_writes]

Sherlock hadn't expected for John to regress- not that he minded of course. But that did change his perspective.

It no long really became how many times could he get off. He was much more focused on what he could do for John. He was quite vulnerable when he was regressed. Of course Sherlock could take advantage of it., But he never had in all the time that they had been together, and he never, ever would
.
He would rather die first.

It was a little jarring to see John regressed, but still in his Demon form. The two just seemed to opposite. This was not the first time it happened, and he was sure that it wouldn't be the last either.

But Sherlock was going to make sure that John got the pleasure that he had been denied for so long tonight while Sherlock had taken his pleasure several times.

He was still thrusting himself inside of JOhn, but now it was very slow only to keep up his erection and make John feel good, not to get to the end.

"My good, good boy. I'm going to make you feel so good, for being such a wonderful boy tonight." And with that, Sherlock took his hand- the one that didn't have John's tail wrapped around it, held John's massive Demon cock- he couldn't even come close to getting his hand all the way around, and gave it a long, slow stroke.

[ihadabadday]

John loved his Daddy. He wanted to make him happy, make him proud. He shivered and pushed back, wanting to just please him.

"Daddy..." he moaned, "You feel so good in me."

He always did. The blonde moaned, clutching at the blankets under him.

But then that hand was on him. He gasped and pushed into it. No matter what, Daddy's hand always felt so good on him. He whimpered, feeling so close already.

[seaweed_writes]

"Mmmm." Sherlock hummed happily. "And you feel so good, all warm and tight around me." He punctuated it with a little thrust.
Sherlock leaned down, whispering in a low voice right next to John's ear.

"Be a good boy and come for me. I know you want to. You've been so helpful and sweet and good. And you deserve to come. Let go for Daddy."

As much as he wanted to use both hands to wrap around John's massive Demon cock, he had to keep one hand on his mate's hip to steady himself. He increased his thrusting, moving faster and harder, trying to encourage John to fall over the edge with him.

"Come on, my lovely. My John. Come with me.."

[ihadabadday]

That did him in. Daddy's urgings and touches.... He shouted into the pillow as he climaxed, his body tightening around the length inside him.

Oh.

His wonderful Daddy. He moaned and closed his eyes.

His head was spinning, but he felt good. So very good.

[seaweed_writes]

"Mmmmf.... good... boyyyyyy...." Sherlock praised John while he fucked John through his orgasm. He cried out and spilled inside of his lover, grunting softly and thrusting with each pulse.

It was shorter and not as intense, he was exhausted after coming multiple times, and he almost collapsed in a sweaty heap on top of John, stroking his hand through his lover's sandy hair and telling him how good he was and how good he did and how proud he was of him.