A/N: Not proofread cause it's 1 AM, I should be sleeping and I suck. Will read and edit sometime later now here is seductive Deanmon

"Oh, Cassie? Here, Cassie, Cassie, Cassie..."

Dean's mind was growing restless with every single moment he spent cooped up in here, even more so without Castiel to taunt. Ever since he'd come so close to seeing Sammy's blood flow freely... He was craving for the kill and since Castiel had torn it from him when he'd been seconds away... Well, it just felt like justice that the angel pay in some way. Preferably decapitation, or maybe Dean could dismember him, one digit at a time, one limb, just to make it last. But before that happened, Dean needed to claim something that he'd wanted for a long, long time. And this new Dean, he got whatever he wanted.

"I promise I'll play nice, Cas," he tried again, knowing very well that the angel could hear him. However, that also meant Dean could hear him and as soon as he started to really listen, it was obvious what Cas was doing. "You're ratting me out to Sammy?" Dean laughed mockingly, straining his ears in hopes of catching more of the conversation.

Upon hearing that Castiel was urging Sam to hurry back, Dean felt that the little chat had gone on for long enough. Since his shouts hadn't been effective so far, Dean jerked back in the chair, back slamming into it. It wobbled just so before hitting the ground with a firm thud. Along with that, Dean started shaking the stupid cuffs keeping him trapped here, almost positive that the racket would draw a suspicious Castiel in here.

Mere moments later, he proved right. The fierce, blue eyes were burning with anger as Castiel stormed into Dean's personal holding cell. "What are you doing?" the angel growled at him. Dean's blood rushed. That anger was so damn enticing in so many different ways. His skin tingled at the mere thought of what he had planned for his little guard dog.

"I wanted to get your attention but you very busy with my little brother, so I figured drastic times..." Dean grinned deviously, settling back in the chair.

"Why did you need my attention?" Castiel retorted, still hovering in the doorway, as if he was frightened to come any closer. And with good reason, Dean thought. But he would have to change that. He need the angel close; close enough to smell the anger-mixed-fear, close enough to see every single emotion that would flash in the blue orbs, close enough so that he could hold him and touch him until he begged for mercy and then Dean would give him the mercy he pleaded for. Eventually.

"Because I wanted your company," Dean replied, tone laced with innocence and good intentions. Of course, that tone was hardly believable coming from a creature of hell, but still. Castiel merely scoffed at that, turning on the spot to leave.

Dean smirked. "If you don't, I'll just keep myself entertained by getting out of these chains. And I know you can't watch me while you're all the way over there behind a closed door." Castiel halted, always falling so wonderfully in the traps Dean was laying down, playing his script perfectly.

Finally, Cas turned around, the scruffy face blank. "No talking," he ordered, at last stepping into the room and taking a seat in the far corner. Settling with a rigid back into the chair, Castiel's arms crossed over his chest, the thin material of the shirt settling nicely along his biceps.

"Fine, we can just stare at each other until Sammy gets back, then." And that Dean did, head cocking to the side as he allowed his eyes the luxury of roaming over every inch of Castiel. Like black ink spilling over paper, Dean's eyes were engulfed in darkness.

It didn't take long for Castiel to start squirming, the blue-eyes gaze having averted to the far wall a long time ago. But that didn't stop Dean. He knew Cas knew he was being watched. Intensly.

"If you're trying to make me uncomfortable..."

"Then it's working perfectly, I know," Dean finished for him, the smug, self-satisfied grin audible in his voice. He could feel Castiel bristle from the other side of the room, enjoying every single rise he managed to invoke in the angel. It was only a matter of time before he risked coming up close again. The torn coat had just been the beginning; foreplay, if you will.

"You know, I've barely ever seen you look scared, Cas," Dean pondered aloud, breaking Castiel's rule of no talking but instead he moved his gaze. It was likely that Castiel would settle for talking if it eased the staring. At least for a little while. "Like genuinely frightened. I mean, I know you've been terrified a lot of times but you've always hidden it so well. Like now, for instance."

Castiel's interest seemed to perk up at that and Dean suppressed a joyful grin. Hook, line and sinker. "You must be nervous that you and Sammy won't be able to make me all better again, right?" Words laced with mocking and sarcasm meant another burst of anger from Castiel. "And you being the brave little soldier that you are, would of course volunteer to gank me so poor Sammy wouldn't have that on his conscience. And that has to scare you, Cassie, am I right? You've spent your entire time here on Earth trying to save one measly, little human and in the end, you're going to have to kill me."

Dean's laugh seemed to do the trick as Castiel's chair cluttered to the ground. Dean's wrists were suddenly being restrained with inhuman strength and that oh-so-familiar musk filled his senses. "You are no human. If we can't bring Dean back then that means he's already gone and that will not have been mine or Sam's fault," Castiel spat into Dean's face. Dean decided to use his chance while he still had it.

"The only time I've genuinely seen you look petrified was when I brought you to that brothel. Remember that, Cas? You were so innocent, a perfect little virgin, you have no idea how much I wanted to give you what you wanted, what you needed, but I was scared," Dean rushed out but his mouth still wrapped perfectly around every word, making sure that Castiel received the full and utter intensity behind them. "But this Dean? He's not afraid of anything and he can give you whatever you desire, Cas. Don't think you can hide what you want from me, Cas. I know you better than anyone..."

Dean's mouth hovered so close to Castiel's ears, his voice low and seductive, and it was a wonder the angel hadn't moved away yet. Managing to turn his hand upwards in Castiel's loosened grip, Dean's fingers brushed the angel's wrist.

Sadly, that seemed to snap Castiel back to his senses. With a shocked and angry gasp, Castiel practically stumbled away from Dean. His eyes were wide, his fists were clenched and before Dean could even open his mouth to continue, Castiel had grabbed and unscrewed the silver flask.

Holy water scorched Dean's skin and his teeth clenched as his face burned. "We're done here," he heard Castiel say over his own pained grunts. When Dean opened his eyes, the doors were closing.

"You can't deny it, Cassie. Demon or not, you want me," Dean shouted and then he was alone in the room once more, grinning and laughing to himself. His mind was brimming with possibilities, all the things he would do, all the things he would make Castiel do. As soon as the angel's urges and anger became too much to bear... Dean would get his fun and then he would quench the thirst brought on by Cain's mark.

…...

Castiel didn't care that he shouldn't let Dean out of his sight, no matter what. He needed to get away, further than just behind the closed doors. He stumbled up the steps into the bunker's upper floors, turning into the first bathroom he located and slamming the door shut. He breathed heavily in the dark until the black began to bear an uncanny resemblance to the hellish, pitch black eyes and Castiel turned on the lights.

His heart hammered heavily against his ribcage and his breathing was uneven. But he wasn't scared, despite what his dark eyes were telling him. No, he was angry. And he felt something more. Something bad, which in all honesty, did scare him. Turning on the faucet, Castiel splashed his face with freezing water, knowing that if he could sweat, his shirt would be drenched by now.

After his speech to Hannah about the inconvenience of feelings... Of course, he had always cared for Dean, and Sam as well. But he'd never allowed himself to think any further than that, to really indulge in just what those feelings meant. Feelings were dangerous and now, with Dean forcing out things he'd never even knew he could feel – this excitement and anger and intrigue; pure lust – feelings had just become even more dangerous. And if Dean wanted to play this game, Castiel was intent on playing it by his own rules. And he was intent on winning.