lux_tuli

Title: "Under My Skin"

Fandom: Supernatural

Rating: Teen

Pairing(s): Gen-fic

Characters: Castiel, Lucifer, Michael, Sam Winchester, Dean Winchester

Word Count: 1,614

Summary: [S11 AU] When Castiel had said yes to Lucifer, he had not expected the archangel to constantly mother him.

Originally posted: February 7th, 2017

When Castiel had offered himself to Lucifer, he had not imagined how incredibly awkward it would be to have his parent possessing his body alongside him. He had been smothered as a fledgling, Lucifer had always kept a watchful eye over him and was there if something happened to him. When he had skinned his knee during his first flight, Lucifer was on him in an instant to heal his injury and comfort him.

Now that he was considered an adult by angel standards, which maturity was determined by being able to fly successfully on one’s own, Castiel did not think he would have to worry about being smothered but he was proven wrong. They were back at the bunker and Castiel was relieved to be near his friends. He was sometimes permitted control of his vessel around them so that he could communicate with them.

Lucifer was currently scrutinizing the contents of the room that he had been granted, which was mostly bare. Eyes scanned over the titles of all the books piled onto the end table.

“ You should update your wardrobe to something more befitting of your status. This trench coat is so plebian .” Lucifer liked to call Castiel “his little prince”, since being the child of two archangels, one of which was the viceroy of Heaven would make him like angel royalty, but he never cared for the endearment because of the implication. Sometimes he wondered if Lucifer was trying to overcompensate for Michael, who had not been much of an active participant in his life.

“ The trench coat is adequate and I have no complaints about it. ” Castiel brushed him off.

“ Why are you so modest? ” Lucifer whined.

---

Castiel found it peculiar one morning that Lucifer was in the kitchen, let alone making something. He had not been aware that Lucifer knew how to cook or where he had acquired that skill from since cooking was not an angelic behavior. They were soldiers so they fought and sometimes helped groom each other’s wings.

He could make out the scent of sweet fruit that was freshly cut up and noted strawberries that had been finely cut and placed into a bowl on the counter to accompany the waffles that Lucifer had made.

“ Castiel, dear, I made you breakfast, eat up .” Lucifer told him before relinquishing control over to him.

“ Lucifer please stop mothering me. I’m not a fledgling anymore so it is unnecessary .” Castiel grumbled and before Lucifer could respond, they were joined by another presence.

“Hey, something smells good in here,” Dean walked into the kitchen, wearing his grey robe over his pajamas, “Damn, Cas, I didn’t know that you could cook.”

“I don’t.” He replied simply. It took a moment for the words to register before Dean’s eyes widened in shock.

---

They were strategizing over the large table with a map when Dean asked suddenly, “What about Michael?”

“What about him?” Lucifer hissed. The subject of his father was still a sore spot for the archangel. He was upset that he had refused to stand down at Stull Cemetery and on top of that Michael had not acted much like a father to Castiel after Lucifer had been kicked out of the Host, causing him to be neglected. Castiel liked to think that he turned out alright considering but Lucifer would not stand for it.

“It took you and three other archangels last time to take down Amara so we are kinda short on archangels right now.” Dean reasoned, which was a valid argument.

“ Dean has a point .” Castiel supported.

“ Michael can go fuck himself .” Lucifer growled before storming off angrily.

Of course, Lucifer’s resistance to the idea did not stop the Winchesters from opening the Cage and letting out Michael, who joined them in the form of a young woman with bright green eyes and red hair. Michael’s eyebrows furrowed when he saw Castiel then narrowed his eyes into thin slits.

“Lucifer, why are you possessing Castiel?” He spoke harshly.

“Oh, I don’t know, maybe because there’s not a lot of vessels that can even withstand to hold me.” Lucifer responded sarcastically and Sam stood between the two archangels, afraid that they were going to exchange blows. Perhaps it was not a good idea to have his parents in the same room together.

Castiel pushed Lucifer aside to address his father, “I offered myself willingly to be of use to the cause.”

“He’s fallen, being in such close contact with his grace will taint you.” He could feel Lucifer fuming at the implication and how badly he wanted to shout at Michael but Castiel kept him down to maintain control over his body.

“One could argue that I’m already fallen considering that I had defied your orders. Though, since when have you cared?”

“Mind your manners.” Michael scolded, a displeased frown tugging at his lips.

“Or what? Are you going to put me over your knee and spank me?” He responded sarcastically and he could feel Lucifer laughing hysterically.

“Cas-” Sam gasped, eyes wide in disbelief.

“Face it, you were a shitty father. You were content to ignore my existence because it meant that you didn’t have to acknowledge the fact that Lucifer was your mate and I was your child.”

“Whoa, wait, what!?” He vaguely heard Dean exclaim but he kept his attention focused on Michael.

“ That’s my baby! ” Lucifer cheered.

---

Michael had kept himself at a distance since the confrontation, angry at both him and Lucifer. Afterwards, his friends demanded an explanation of how Lucifer and Michael were his parents. How bonds worked between angel mates was not something that was freely shared nor the fact the bond could produce an entirely new angel.

Lucifer had seized control of his body and avoided answering the question by saying in a joking manner, “You see when a daddy angel loves a mommy angel so much, sometimes a new angel is conceived.”

Which had only prompted more questions from his friends but Lucifer had remained evasive on the subject and Castiel declined to comment further either way. He knew what their bond once was but even he was unsure if his parents were still mated or not. And neither one of them would even speak of the bond.

“ You need to have someone groom your wings, even if it is one of those mudmonkeys .” Lucifer said as he commented on the state of disarray that was his wings as he stared at them through the mirror in his room. When he was still among the Host, he used to have his good friend Balthazar tend to his wings but ever since he left, he did not have anyone to care for them.

“ How about I ask father for his assistance? ” He said sarcastically before adding, “ Stop insulting my friends. ”

“ You could do better than a couple of humans .” Lucifer huffed, deliberately not commenting about having Michael groom his wings.

“ They have stood by me even when I made terrible mistakes. They were there when I turned my back on Heaven. ”

“ You still deserve better. ” Lucifer frowned but did not offer any more complaint.

---

Castiel had dozed off for a bit when he regained awareness of his surroundings, he saw that he was standing in front of his father. The two were speaking in Enochian, probably so that neither one of the Winchesters could overhear their conversation.

“Ah, little Cassie is awake…” Lucifer acknowledged, “So, will you do it? I would do it myself if I was in my own vessel.”

He instantly became concerned as to what Lucifer had requested from Michael. It had to be something that he had considered to be important if he had gone to him since they were not on good terms.

“Very well.” Michael sighed as he consented. Lucifer pulled back, leaving Castiel in charge of his body.

“What is going on?” He asked in confusion.

“Lucifer came to me in concern about the state of your wings. He says that you need a proper grooming.” His father answered as he stretched out his own limbs.

“ I was not serious. ”

“ But I was .” Lucifer insisted firmly, “ I don’t like this anymore than you but this is the least that he can do for you as your father. ”

Michael appeared to be waiting for him to unfurl his wings so he reluctantly did so, refusing to turn his head to look back at them. He was well aware of the ragged ends and missing feathers. His father let out a deep breath at the sight.

“And here I thought Lucifer was exaggerating.” He commented as he tentatively ran a hand through the feathers.

---

Lucifer had taken it upon himself to create a garden right outside of the bunker, which he tended to daily by watering the plants and pulling out any weeds. Sometimes he sang to the plants too.

“ Do you remember when I used to sing to you when you were little?” He commented suddenly, his tone sounding fond in remembrance of those days.

“ I do. Your voice was the envy of the entire Host. ” Lucifer would hold him in his arms and sing to him but occasionally his singing had drawn in a crowd, all captivated by his voice that was so beautiful no other could rival it.

---

“ Don’t worry, you will be alright. ” Was the last bit of assurance that Castiel got from Lucifer before his grace departed from his body. Castiel could only watch wordlessly in confusion as the huge ball of light that was Lucifer without a corporal form propelled right into Amara in an act of mutual self destruction.

And thus, the Lightbringer had vanquished the Darkness.