Concede

When he returned to the store, he found Lucifer patiently waiting for him, meandering around the interior of the room. Neither one of them said anything for a good minute or two. They didn't have to. Both of them seemed to know what the answer was going to be even though Castiel felt like he hadn't quite made up his own mind yet. He didn't know if he would be doing the smart thing, but he knew it appeared to be the right thing. There were no certainties here and the one thing he did know for certain in this situation, the Devil was waiting for him to say the words vocally.

"Okay," he said finally.

Lucifer paused in his pacing and peered at the other angel with a slight tilt of his head. He waited a moment before putting together the tips of the fingers of both hands in front of him at waist level, turning fully to face Castiel.

"Okay what?"

He loosened the tie around his neck further, jaw clenching as he shifted his shoulders. Almost as though the vessel had suddenly become too uncomfortable to be in. Castiel should have been able to understand the human body better. Especially after practically becoming entirely human during the apocalypse from losing the power of Heaven. The inability to keep still was sometimes a display of being nervous for humans. Castiel doing it may have been a sign of how familiar he'd grown in the body of Jimmy Novak. The angel wasn't thinking of any of those things for long. His focus centered on Lucifer who was watching him closely, expecting a response.

"Yes. I will agree to the deal. With one condition or I won't do it."

Lucifer raised one of his eyebrows, interest evident. "Name it."

"I will aid you in making your vessel permanent, if you will swear to never harm or cause harm to come to Dean and Sam Winchester, and, swear to never use the four horsemen to do your bidding again. Then I will agree."

A humorous smile came across the archangel's face. "You think that is a fair deal?"

Castiel's retort came quick. "After everything you did, starting the apocalypse, killing plenty of innocent humans during your fight for domination over humanity when you were freed from the cage, yes, I think it is a fair deal."

"Deal."

"What?" Castiel choked out.

The Morningstar seemed to be positively relishing the surprise on Castiel's face.

"What's the matter, Castiel? You didn't think I would agree?" Lucifer wondered, moving to stand only a foot or so on the other angel's right. "Or maybe, maybe you didn't want me to."

The bewildered angel adjusted his tie a second time. "Of course I wanted you to accept the deal. Much catastrophe can be averted with this deal."

"The horsemen will go on killing even without my guiding hand. You realize this?"

"I know. Alone and without encouragement to do their worst, their damage is contained and remains within the limits of what they were created for. That is how it should be. It is better," discerned Castiel.

Lucifer's expression took on one of someone mildly impressed and accepting. The younger of the two wore a look of concern.

"Do..Do we still have a deal?"

"Yes."

"Good." Castiel said hesitantly.

"I must insist that we make the deal in the demon and human fashion however."

When Castiel only seemed to become further perplexed by the statement, Lucifer added his reasoning behind it.

"I believe you would be true to your word. I prefer to be without doubt though. The last time you made a deal, you reneged on it. To ensure that does not happen again, we do it the demon way, as distasteful as I find them..."

Castiel seemed ashamed at the reminder of his terrible mistake with the souls of purgatory and the demon named Crowley who had talked him into doing it in the first place. He could find nowhere to lay blame on Lucifer for wanting to make sure their deal would stay in place. As he further thought things through, he found the idea more appealing. Done this way, Lucifer too, would never be able to break the deal.

"Um..okay."

"You understand what that means?" Asked the Devil.

"Yes. We must engage in sexual intercourse. It is the only way to create and seal an agreement of this magnitude into our very selves."

Lucifer laughed loudly. "How technical of you."

Satan got very close to Castiel. So close that the younger angel had to crane his neck upward to see Lucifer's face as his vessel Nick, was several inches taller than Jimmy.

"Lucky for you, Castiel, we can kill two birds with one stone."

"Meaning?"

"We can seal the deal and complete the ritual at the same time. The healing grace of an angel, shared blood of a loved one ingested by both, together to bind a permanent host. Grace and blood, both of which you possess. It will work beautifully."

He didn't have time to say anything in reply because Lucifer had erased the final distance between them, lips ghosting over Castiel's own. Any words he might have spoken to the fallen angel were immediately forgotten. Then the Light Bringer was kissing him, deep and sensual. The Devil tasted like ash and dirt, sin and desire. Somehow, he also tasted like flowers and pure air, light and love.

"Do you want to know what you taste like, Castiel?" Lucifer asked, breaking the kiss.

Castiel looked up at him with big eyes and the Devil smiled. "You taste like the morning air, just like your grace."

"Like my grace?" He questioned, honestly confused.

"You don't know? Every grace leaves a trail that can be followed. Archangels can more easily sense it compared to the other angels. Your grace, Castiel, smells like the morning dew."

The blue-eyed angel had never known this about angels. It made a lot of sense considering how well the archangels could find other angels when they really wanted them to be found. Castiel blinked once at Lucifer and the older angel took that as a signal for him to initiate another kiss. This one was harder, both rough and tender at the same time. He found he was rather fond of being kissed by the Devil. Castiel never would have imagined that to be feasible.

Thoughts of reason dissipated from Castiel's mind when Lucifer's tongue delved past his lips, exploring the inside of his mouth. There had been few kisses in Castiel's rather long life, one being with the demon Meg and the other kisses were with her. The angel who had taught him how to love another beyond logic. But this wasn't the angel who had abandoned him long ago. It was easy to remember that fact with Lucifer's hands now exploring his body. A snap of Satan's fingers and suddenly they were in a nice bedroom, somewhere Castiel didn't recognize.

Lucifer ended the kiss, pulling Castiel's body flush against his own, resting his forehead on the shorter angel. He seemed to have noted the curiosity in Castiel's eyes for he informed of their current location.

"This was Nick's home. Of course, he has moved on now to Heaven. It's just me in here."

"Jimmy..he is asleep right now."

"Jimmy is the name of your vessel?"

"Yes."

Lucifer didn't say anything else. Another snap of his fingers and their clothing was gone. He was kissed again and Castiel hungrily returned it in an almost desperate fashion. The older angel maneuvered them over to the bed, fondling the other the entire time. Before he knew it, the Devil had him on his back and was on top of him. Castiel stared up at him as Lucifer paused to look into his eyes and a smile grew on his lips.

"You have nothing to fear from me, Castiel."

Castiel bit his bottom lip, uncertain if he wanted to say something. Lucifer's eyes were penetrating. He chose to be truthful and tell him how he felt because the thing about being around the Morningstar, it felt like Heaven. Being with Lucifer felt like home.

"It's not you."

The angel's eyes went lower. The Devil's eyes followed and a grin broke out across his face.

"You're a virgin."

"Will it hurt?"

Castiel was avoiding meeting the archangel's gaze. Lucifer took the younger angel's face gently in his hands and tilted it to look straight at him.

"At first, a little. Then it's better, pleasurable."

Lucifer placed the fingers of one hand into his mouth and wetted them thoroughly. "I'll talk you through it, okay? We'll go slow. One finger to begin."

The younger angel's response was to continue to stare up at him. He watched as Lucifer removed his hand from Castiel's face and used it to part his legs, slipping the hand with the wet finger between them. Fingers prodded at his entrance and then a finger slipped inside smoothly. The feel of the foreign object inside of him was startling and Castiel squirmed.

He steadied the angel's legs and Castiel found it wasn't so bad when staying relatively still. The Devil waited until very blue eyes found his paler ones before adding a second finger. To Castiel, the touch felt strange but not bad. Not bad at all. Wrapping his arms around Lucifer's neck, he pulled the Devil against him, eliciting a kiss.

"More," he murmured against the archangel's lips.

"Happy to oblige."

A third finger found its way inside of him and pushed in deeper than before. There was definitely pain but as Lucifer pushed further, he hit something that felt rather gratifying to Castiel. A noise escaped the younger angel which he didn't even realize until Lucifer commented about it.

"That's what I like to hear."

Lucifer started planting kisses and gentle bites along his neck and across his chest and shoulders. He laid back and let him for a time, then Satan lifted his head to eye Castiel.

"Are you ready?"

"Yes, yes, do it. I want to feel you inside me," insisted Castiel.

The fingers were removed and then Lucifer was lining his member up against the entrance. Castiel spread his legs apart to allow Lucifer better access and slid his arms down the smooth skin of the archangel's back, finding purchase with his rear end. The fallen angel seemed to like that and leaned down to plant a kiss on his lips. He raised his head back up and gave a slight nod, proceeding to enter Castiel with his member. Lucifer went slow, giving plenty of time for Castiel to adjust to his size. When he was all the way inside, he looked at the angel beneath him directly in the eyes. The Devil pulled his member out except for the head and then pushed in all the way.

The angel's mouth parted and he gasped. Breathing heavily, his cheeks flushed with color and Lucifer couldn't help but put his lips to Castiel's own. One of Lucifer's hands took Castiel's member and wrapped around it, pumping in rhythm with his own thrusts into the young angel. He pressed himself down against the angel as skin slapped against skin and the kissing grew heavier, stifling the majority of the moans escaping continuously from Castiel.

Spurred on by the ecstasy filled sounds Castiel was making as the minutes went by, his pace quickened.

"Lu-"

Castiel couldn't even get the other man's name out as a particularly hard thrust from Lucifer stole his breath away. The smaller angel felt waves of heat and pleasure radiate from his groin area as a white substance ejected from his own member and onto his chest. A few more thrusts and Lucifer's climax followed soon after. Semen filled the inside of Castiel's hole and his back arched as a multitude of feelings flooded through him from the raw, instinctual act completed.

Though he could feel Lucifer's member had gone soft inside him, the Devil remained there and initiated an open mouthed kiss. Castiel returned it enthusiastically and Lucifer smiled into the other's mouth. The angel peered up at him after noticing the smile and actually managed to very slightly tilt his head in his typically puzzled manner as he lay there on his back.

"I'm going to draw blood," warned Lucifer.

Castiel stared blankly as the Devil pressed his lips against the flesh of his shoulder and then bit down. The bite was deep and the blue-eyed angel failed to stop the wince passing across his face from the sudden action. When Lucifer lifted his head from the shoulder, Castiel saw blood dripping from his lips. His blood. And then his lips were back on the younger angel, kissing him, and he was tasting his own blood. Satan's kiss was rough and thorough and he didn't let up until all of the blood had been transferred into Castiel's mouth.

"Swallow it all," the Morningstar told him and began murmuring a chant in Enochian that was totally foreign to the younger of the two.

He did as he was told, even going so far as to lick his lips which brought a grin to Lucifer's face as he finished the chant. No sooner had Castiel ingested the blood when pure white light of Lucifer's grace radiated from the human vessel, filling the entire room. Castiel felt the human eyes of his own vessel roll back, mouth gaping, and the light of his own grace began to glow from his eyes and mouth. That was when the Devil leaned over him and captured his mouth with his own one last time.

As the kiss began, the graces seemed to wrap around each other, and then they vanished back into the vessels as quickly as they'd emerged. Castiel slowly closed his mouth and blinked once. His senses came back to him as Lucifer extracted himself from him and he laid back on the bed next to Castiel. During the intercourse he'd been lost to rational thought. Now that it was over, he remembered the deal and the ritual.

"Your vessel?"

"Nick's body is now my true vessel."

Castiel wasn't understanding everything but as his thoughts moved rapidly in his mind, he seemed to be assessing the situation and coming to a conclusion.

"Grace can be intertwined between two angels during intercourse and blood shared at the same time, so long as the right words are spoken in Enochian. That is what needed to be done?"

"Yes."

"Okay."

"Okay?" Questioned Lucifer.

"It's done."

Castiel sat up and with a single thought, his clothing was back on. "I...I have to go somewhere."

"Go. I will await your return here. Where might you be going? Dare I ask?"

"I need to pray."

He didn't say anything more before he was gone with only the sound of his wings fluttering as he vanished.