"This can't be happening again" Thought Merlin.

When the brunet opened his eyes, he found himself, once again, on his back on the same canopy bed with red sheets and in the same bedroom of the last time he had waken up in this situation.

He frowned, searching in his tired and blurred mind what had happened to him. The last thing he remembered before everything became dark was that he was resting his feet on a bench by the river of the Scottish town where his friends and he were attending a sort of festival. Then he had heard a voice of someone right behind him…a familiar voice…

Arthur!

Suddenly, he tried to touch his still throbbing head, and it was in that moment that he realised that he couldn't. He looked up and noticed with dismay that each of his wrists were tied to the head of the bed through metal shackles and chains. They weren't tight, not enough to hurt him anyway, but still, he couldn't go anywhere.

Moreover, worst of all, he also noticed he was completely naked.

Once his head stopped spinning, he felt something touching his exposed six-mouth belly. He gasped and looked down, only to be met with the reddest eyes he had ever seen.

It was Arthur's, of course. His nightmare and unfortunately, the father of his child.

The vampire was currently caressing his belly with both hands, slowly, gently, as if it was the most precious thing in the whole world. He was also leaving deep and wet kisses on its top, exactly where Merlin knew the baby's head was. It was as if father and son were kissing each other, with only Merlin's skin separating them, but at the same time, it was as if the both of them were kissing Merlin.

Merlin whimpered and moved, attracting the attention of the blond, who lifted his eyes and mouth from where they were busy cuddling his son.

"Finally awake?" Arthur asked, kissing the belly once more.

"Arthur" Merlin's voice was hoarse.

"The very same" He smiled and crawled until he laid down next to the brunet. With a hand he supported his head, with the other he continued to stroke the belly. He didn't want to lose physical contact with his child. "God, love, you have no idea what a difficult person you are to find. It took me mouths. But now you are here, and I'm not letting you go anymore, this a promise you." He growled the last part.

Merlin swallowed and tried to roll away from his jailer, both because he had to admit he was scared of him and because he wanted him far away from his baby. If he could move his arms, he would have already crossed them on his belly to protect the life inside of it. However, due to the restrains, he didn't go far.

"When are you going to free me?" Merlin asked, as Arthur was distracted kissing his temples, cheeks and the side of his mouth.

The blond stopped, and pretended to think about it. "I'm going to free you when I'm sure you won't try and run away from me; when you'll finally accept the inevitable, that's it, that you're MINE, my bride, the 'mother' of my children – because I am telling you now that we'll have plenty of kids – and my eternal partner"

Merlin hardened his eyes, "Then I will have to suck it up and accept the fact that I'll spend the rest of my hopefully short life chained to this bed!"

"Oh, don't be such a drama queen….we'll be happy together, you'll see…and one day you will apologise for having been so silly now…"

"NEVER! I'll never stop trying to escape from here, from you!" He struggled, tagging at the chains to underline his point.

"Even when the lives of your friends are at stake?"

Merlin stilled, suddenly cold, "What?"

"I think you've heard me just fine"

"My friends, they are here?" Merlin whispered, his heart broke.

Arthur nodded, "Yes, I've captured them, too: the two sweet girls, that noble brunet and that long haired insect that took you from me last time. I need a bargain, after all, in case you decide to be your usual stubborn self. Is it working?" Arthur asked, smirking, merciless.

Merlin's eyes were wet now, "You're so heartless," He said with a shaking voice.

Arthur laughed, "No, I'm not, really. The truth is I've a heart, but it only beats for you, my love, and for nobody else, as it has been since the day we met"

Now Arthur was kissing him on the lips, ravishing his mouth, leaving no doubts about his feelings.

Merlin really wanted to cry. His mind was so confused about what to do.

"What do you want?" Merlin asked, hoarse. Arthur was kissing his neck.

"You, only you…and our child, forever…give yourself to me, my beloved, and no one will get hurt"

"You'll let my friends go?"

"Can't do that…" The blond murmured in his ear, "…but I can promise they'll live"

Merlin closed his eyes and breathed deeply. With a heavy heart, he silently nodded his consent. His kind nature wouldn't allow him to sacrifice someone else's life for his own selfish reasons.

Arthur beamed, overjoyed. "Oh, my love, we shall stipulate our agreement with the most intimate of the acts, given with consent"

Bending his head, Arthur smiled as he left a trail of wet kisses on Merlin's swan neck. The brunet remained stiff, not wanting to give him any satisfaction. He wanted to make sure that Arthur understood that Merlin was an unwilling participant.

"So cold…like kissing a corpse…" Arthur murmured.

"You should know something about it…"

Arthur laughed, then started to devour Merlin's mouth, ravishing it with his tongue, chasing and taking the brunet's.

When he broke the kiss, the blond noticed with absolute delight that Merlin's lips were swollen and darker, and his cheeks were blushing... he was a sight to behold!

"Oh, my dear, how much I want you…so much I can barely breathe…"

He started to leave open mouthed kisses all over his body: his face, his neck, his nipples, his chest, his belly of course; then he concentrated on his long and soft legs, licking his toes. Then, he put Merlin's right leg on his shoulder and bend down to kiss and bite his inner thigh.

Merlin found himself struggling to hold back moans. Arthur knew what he was doing very well, and the movements of the baby, suddenly exhilarated by his father's closeness, weren't allowing him to remain impassive.

It became worse when Arthur laid between his spread legs and lowered his head (because of the belly, you could barely see him). He swirled his tongue over the other man's cock-head. Merlin yelped, surprised. Arthur chuckled and began to kiss his length and then his balls.

At that, Merlin really couldn't stop himself and moaned aloud. "A-Arthur, stop it…" He begged.

"Why should I? I love pleasing you, exploring your body…if it was up to me, I would spend eternity worshiping your beautiful cock, with your balls in my mouth…mmmm…you know, it's not a bad idea…I may actually consider it"

He opened his mouth and swallowed Merlin's member, welcoming it into the wet heat of his mouth.

Merlin screamed, arching his back upward, and in that exact moment, Arthur pushed a finger in his hole, taking advantage of the brunet's distraction. Merlin could feel the growing pleasure and moaned, hating himself for it.

Arthur bobbed his head up and down at a fast pace, shoving more and more fingers in Merlin each passing minute. The filthy wet sounds his asshole was producing were addictive. The blond looked up and watched his beloved coming apart, his pupils dilated and sweat wetting his forehead.

Suddenly, Merlin's hips jerked up and came into Arthur's mouth, who eagerly swallowed his release, every single drop. He growled in satisfaction. His love tasted so sweet.

The blond let go of the now limp member, letting it slip out of his mouth. Then, he lined his hard one to the brunet's entrance and drove inside. Merlin opened his mouth in a silent scream, which Arthur covered with a passionate kiss. He started to thrust in and out of Merlin, fast, deep, insatiable.

Their panting echoed in the room, along with the clinking of the chains tying Merlin up every time he moved.

"MINE... You are mine... now and forever..." Panted Arthur.

After what seemed like hours, both came and Arthur collapsed next to Merlin, mindful not to crush the baby. The blond stroked Merlin's lips reverently, while the latter tried to catch his breathe.

"You are mine... I am your Master... and you belong only to me"

00000

Sometime later, after Arthur had untied Merlin, silence reigned in the room.

Merlin was on his side, giving his back to Arthur, who was softly kissing his naked and slightly sweaty shoulder. He was looking into space, feeling nothing.

"I want to see my friends" The brunet broke the silence.

"Hummm…Why?" Behind him, Arthur was now stroking his swollen belly, where the baby was kicking enthusiastically.

"To see with my own eyes whether you've told me the truth and they are really still alive"

"Don't you trust me?"

"No"

Arthur laughed, "Oh, how much I love you, Merlin. You know me so well"

Merlin refused to answer that he thought he knew him. He thought he knew the once sweet blond boy who used to sit under an oak in the school park, reading yet another book. At the time, Merlin had wanted nothing more than to join him in his little peace sphere, maybe spending afternoons talking about their favourite books and authors. Merlin had liked that Arthur very much, thinking he was different from the others. He had never actually approached him like that because he thought Arthur didn't like him that much, since he was always careful not to meet his eyes and seemed to sweat a lot when Merlin was near…

His heart broke at the memory of that boy who had been his secret crush for years…and who now was gone, killed by the beast behind him.

After finishing laughing, Arthur got up. "Ok, then. I'll take you to them. Let me just fetch your new clothes"

00000

The two of them went downstairs, toward the dungeons. It was mostly dark, but surprisingly warm, which was fine with Merlin, given his clothing.

During the last six months, he had grown accustomed to wear loose and heavy clothes to hide his condition, but now he was wearing an extremely comfortable shirt and trousers that fitted him perfectly, parading his belly. It was obvious that Arthur wanted everyone to see his seed growing in Merlin... a true proud father, you might say.

"You would think the dungeons of a castle like this one to be cold like the stone that created them…"

Arthur chuckled, as he kept dragging Merlin by the hand deeper and deeper. "You would think so, wouldn't you? Well, this is not the case, because down here, there is the Gate of Hell, and I can ensure you that that place is quite hot" He smiled, pleased.

Merlin swallowed. He had never been a religious person, but he had to admit that in that moment he was feeling the need to cross himself.

They reached the dungeons, meaning, a labyrinth of tunnels, each one holding many cells and rooms, some of which were clearly filled by some poor soul.

Arthur stopped him in front of a wooden door.

"Here we have Guinevere and Lancelot…"

Merlin was scared, because the sounds that came from behind the door were unmistakable. And he was right.

When Arthur opened the door and motioned for Merlin to approach it, what he saw stopped him where he stood.

A tangle of naked and sweaty bodies spread before him, in a room with black walls, illuminated by faint torches, and with fluffy pillows and red silk sheets scattered on the floor, on which the bodies were moving, among moans and screams of pleasure. The sound of flesh against flesh was deafening. They almost looked like pink worms. There was at least one person wherever you looked, even on the walls and on the ceiling, and they were obviously engaged in wild sexual activities.

"W-what is this?"

"Most of the people you see here are Succubus or Incubus, lust demons in female and male form respectively. They seduce humans and feed themselves with their energy during sex until the humans have no more and die. The demons are the ones wearing golden snake-shaped jewellery; the other people are their victims"

And Merlin had just recognised two of these so called victims. In the middle of this demoniac orgy, he managed to identify Gwen and Lancelot, both of them stark naked like the rest. However, unlike the others, they were chained to something.

She was standing, her arms above her head and tied to the ceiling. Her darkish skin contrasted with the pale one of the Incubus whose face was currently between her legs, while a white snaked enveloped her belly and squeezed her breasts. She was moaning aloud and her eyes was starting to turn unfocused. The same could be said for Lancelot. He was laying on his back next to Gwen and chained spread-eagled to the floor. One Succubus was sat on his face, with a leg on each side of his head; another one was riding his cock mercilessly and relentlessly. His struggling were futile. Then, under Merlin's wide and horrified eyes, the second succubus opened her mouth and a long, very long, and large tongue came out. It travelled down and down, and penetrated Lancelot's defenceless, and probably virgin, ass hole.

Arthur smiled as he watched Merlin petrified posture and expression. However, the blond frowned when he saw a succubus crawling toward Merlin, clearly attracted by the double energy of the brunet: his own and that of the life growing in him.

Arthur bared his fangs and hissed. The demon stepped back immediately and whimpered as she returned into the fray, submitting to her Master and Prince's authority without hesitation. She was going to tell all her fellows that the delicious boy with child, a delicacy for lust demons like them, was off limits, for their Prince had already claimed him.

To avoid further unpleasant encounters and since the show in front of them was arousing him, Arthur took a still shocked Merlin by the shoulders and led him out of the room, locking the door behind them. There'll be time for the second round of their personal mind-blowing sex.

"You promised…" Merlin whispered.

Arthur turned toward him, his head slightly bent sideway. "Promised what, love?"

"That you wouldn't hurt my friends, you bastard!" Merlin snapped.

"No. I promised they would live…" Reasoned Arthur calmly.

"So you truly are a liar! Because you have told me that those things in there…" He pointed to the closed door they had just left, "feed from humans until they kill them…so Gwen and Lancelot are dying!"

"Oh, that's where you are wrong…you see, I have ordered these demons that when Gwen and Lancelot die, they have to turn them into a Succubus and an Incubus. They will become demons. You should thank me, you know. Your friends will have amazing sex with each other and other people for eternity…that's amazing!"

Merlin was speechless. However, he didn't have time to say something, because in the next second, Arthur was dragging him toward the end of the dungeons. There, he found himself in front of a large stone wall. Nothing special about it.

Confused, he turned to Arthur that was aside, while Merlin was exactly before the middle of the wall. The blond smiled at him and lowered the metallic torch carrier, which was actually a lever.

Immediately, the stone wall began to rise, revealing a large glass wall. The blue of the lake was before Merlin. They were underwater, protected only by the glass.

He could see the bottom, the surface if he bent his neck up, and all the fauna and flora of the lake.

And then, his breath choked in his throat.

Tied by the ankles to the bottom of the lake by a thick chain was Freya. She had no clothes on, her hair was floating around her as she struggled. It was obvious she needed air, desperately, but the restrains weren't allowing her to reach the surface and the so desired oxygen. Her eyes were terrified - she was so scared and Merlin was sure that if she weren't into the water, you would see tears on her small face - and her lips were becoming bluish, while less and less bubbles came out from her mouth.

Merlin punched the glass repeatedly, as if by doing so, he could break it, reach his friend and save her.

"FREYA!" He looked at Arthur, who was impassive. "Please, stop this! You're killing her!"

Arthur approached him, "Calm down, you'll hurt the baby like this. And I'm not killing her. Take a look…" He nodded toward the lake.

Merlin turned back to look at Freya once more and saw a mermaid swimming toward her and kissing her. But it wasn't a real kiss, noticed Merlin. The mermaid was giving her air, after which Freya was definitely better. Then, a few minutes after the first mermaid had gone, when Freya was about to drown again, another mermaid repeated the process, giving Freya the so called Kiss of Life. Merlin could only imagine how her lungs had to burn.

Arthur hugged Merlin from behind. "They're turning her into a mermaid, into one of them. What they are putting inside her is not only air, but also their essence. When Freya is about to die, the mermaids give her a bit of their life force. See? The transformation has already begun..."

Indeed, some points of Freya's legs were covered by purple fish scales and on each side of her neck, three parallel cuts became deeper and deeper after each 'kiss'.

Merlin wanted to cry. "This is no life…this is worse than death…this isn't what you promised me! We have no deal anymore, I'm going away from here, from you!"

He tried to leave, but Arthur's grip became tighter. The blond whispered in his ears. "Are you sure this is worse than death? Want me to go and tell the demons to drain Gwen and Lancelot to death, and to the mermaids to let Freya drown?"

That stopped Merlin. He was panting. He thought back at Freya's scared eyes when she was so near to die, and at the relief that crossed them for an instant when the air entered into her lungs. He thought back at Gwen and Lancelot's growing pallor. He could not let them die in that slow and painful way... Even if cursed, at least Arthur's way would keep them alive, sort of.

Merlin's face fell and he calmed down, knowing he had no choice…Arthur had won.

Arthur grinned at his surrender. However, even if Merlin had tried to run for real, breaking their deal, Arthur wouldn't have allowed him to…he was HIS…forever…letting him go wasn't an option!

"Come, darling, we still have to visit dear Gwaine"

I've chosen to make Gwen and Lancelot lust demons, because in the legend and in general, they are THE LOVERS.

I've chosen to make Freya a mermaid for her role as the Lady of the Lake in the show and for her love for water in this fiction.