He's The Devil You Know

Word Count: 1326

Pairings: Lucifer Morningstar x Reader, Platonic John Constantine x Reader

Warnings: angst, mentions of violence, John and Lucifer just should not be in the same room together

A/N: Request from , Lucifer and Constantine crossover.

Summary: You were fond of your new life, loved the people you'd met and the man who stole your heart. Unfortunately an old and dear friend rolls into town, and he doesn't exactly approve of your relationship with the devilish club owner.

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It'd started as a regular night, you hung towards the back of the club, watching the people enjoy themselves and let loose the stress from their week. You'd be drinking yourself, but you had just gotten done singing and preferred the soothing taste of water then the burn of alcohol at the moment.

"That was quite a show you put on love, haven't heard you sing like that in years."

You almost didn't believe the voice you were hearing, mostly for the fact you hadn't heard it in years, at least not in person. However, when you turned around there he stood, trench coat and all. Your smile lit up your eyes, and you pulled him in for a hug.

"Constantine, you relentless bastard, it's good to know you're not pushing up daisies."

He chuckled hugging you back before you took a step back, holding him at arms length to look him over.

"You look good."

"Likewise love, seems you're doing well for yourself here."

You smiled a bit, shrugging as you motioned for a bartender to bring him a drink.

"I'm happy if that's what you're getting at."

"No chance you'll be coming back home then? Could always use a hand with some jobs."

You shook your head, thanking the hostess who handed John his drink.

"This is my home now, besides my boyfriend wouldn't be to keen on me putting myself in mystical situations where the chance of me dying is higher than the chance of me living."

John raised his eyebrows as he took a drink.

"Boyfriend eh? And will I be getting a chance to meet this mystery man who's got you so smitten?"

You looked around the club, trying to see if you could spot him through the crowd of people.

"He's around here somewhere."

John hummed a little, glancing around the club himself, but you noticed his was a more calculating look.

"You seem on edge John, something I should know?"

He turned his attention back to you, frowning a bit.

"Have you considered a different job? Maybe something far away from this hellish place?"

You furrowed your eyebrows at his choice in words, going to ask what he meant by that, but another voice silenced you before you could get a word out.

"Y/N darling! You'll never believe this delicious concoction the bartender just made it's marvelous!"

You smiled brightly as Lucifer wrapped an arm around your shoulders, holding the strangely colored drink up.

"I'm considering adding it to the menu, it's truly wonderful, would you care for a sip?"

"Maybe later, I'm actually talking to an old friend right now." You motioned to John and Lucifer finally seemed to notice him.

Although neither of their reactions were anything you expected. John looked pale as a ghost, while Lucifer was grinning devilishly.

"Well, well, if it isn't John Constantine, and in my club no less, this certainly is a surprise."

You glanced between the two of them confused.

"You know each other?"

"Oh yes, Johnny boy and I go way back, isn't that right John?"

John stammered a moment, before straightening his back and giving Lucifer a cold look.

"Unfortunately, and I never should have helped you, or that demon." John snapped.

"Oh come now, I helped you in return, we're even now are we not? No need for such hostility, certainly not in front of my darling songbird here." Lucifer scolded, but his smile remained firmly planted on his lips.

John cast you a worried glance and his hand twitched to pull you away from the devil beside you.

"It's not safe to be around him love, you don't know what he really is."

You couldn't help but tilt your head a little, frowning a bit.

"Of course I do."

That provoked a very shocked reaction from John and a rather amused chuckle from Lucifer.

"I... I'm not sure you do love, or you wouldn't be standing so close to him."

You placed a hand on Lucifer's chest as he pulled you closer to him.

"John, this is the boyfriend I was telling you about, I'd introduce the two of you, but that doesn't seem necessary."

John's face went blank, and you uttered his name a few times concerned. Lucifer laughed snapping his fingers in front of John's face.

"Oh dear, I think we broke him darling."

John slapped Lucifer'a hand away scowling at him while the devil simply laughed.

"You're not really dating this lunatic are you?" John finally spoke.

Lucifer scoffed at the insult, but John paid him no mind, focusing solely on you.

"He's the devil you know, king of hell, prince of darkness, Satan?"

"Yes John, I know." You sighed.

"Then what the bloody hell are you thinking!?"

Lucifer frowned at John's shout, and took a step forward but your hand on his chest halted any further movements.

"I'm thinking I've been with this man for the last two years, and you're not about to come here and suddenly convince me he's evil."

"He's the actual devil."

"I believe that's been established, are you having trouble remembering things Johnny? Aging can be so taxing on one's mind. Not that I'd know mind you." Lucifer smirked.

You lightly hit Lucifer's chest, giving him a pointed look as you pulled away.

"Well this has been a really fun conversation..." Your voice dripped sarcasm.

"But now I need a drink now, so play nice while I'm gone boys."

You walked away, and they waited until you were out of sight before rounding on each other. Lucifer handed his now empty glass off to a hostess walking by.

"What's your game here? After her soul?"

Lucifer laughed, placing his hands in his pockets.

"You know I care very little about human souls John, and while I'm sure you'd like to think this is some sort of game, I assure you that's not the case. But what about you? How do you know her so very well it seems?"

Lucifer's smile was full of amusement and John took a weary step back.

"She's like a sister to me, I've known her for years, and I'm not about to let you hurt her."

That struck a nerve with the vacationing king of hell and his amused smile vanished.

"I've no intention of hurting her you blubbering buffoon! But this aimless bickering will, so I suggest you accept the fact that she's an adult capable of making her own decisions and enjoy the rest of your time with her."

Lucifer smiled at you, waving as you began to walk back over. John narrowed his eyes looking over at Lucifer.

"That almost sounded like a threat there mate."

Lucifer kept smiling at you, but his next words were cold.

". If you do anything to upset her tonight, to take away that smile I try so hard to keep on her delectable lips..."

He turned to John when you looked away from him, his smile gone as he grabbed the exorcist's coat.

"I'll reconsider my opinion on killing humans and take an especially keen interest in your soul, do we understand each other?"

John wordlessly nodded, his face pale with fear as Lucifer's eyes flashed red. Lucifer released him just as you reached them, you handed your devilish lover a drink as you looked between the two of them.

"Everything okay?"

Lucifer wrapped his arm around your waist glancing towards John from the corner of his eye.

"I think we've come to an understanding, isn't that right Johnny?"

John cleared his throat, smoothing out his coat.

"No problem here love, excuse me a tick will you, I think I need something a bit stronger." He flashed you a grin before turning on his heel.

You watched your friend hurry towards the bar, and you leaned into Lucifer's side.

"You threatened him, didn't you?"

Lucifer gave you a charming smile as he swirled the amber liquid in his glass.

"Just a bit."