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Alec doesn’t know what he did to deserve this. He must have done something obscenely offensive to someone in another life - which is a wrong choice of words considering what’s going on in front of him.
It started three days ago when he was sitting on the couch watching a movie with Magnus. The bright arch of a portal materialized in front of them. Alec grabbed for his bow safely hidden behind the table, and Magnus’s magic wrapped around his hands. They were ready for an enemy to come through, but instead another version of them stood in the middle of Magnus’s loft.
Alec’s hands itched to shoot anyway, regardless that these people are them. They could be demons, but it doesn’t explain the portal. The other Magnus smiled at them both, and he waved his hand. The portal disappeared, and he appraised the room with a sense of admiration.
The other Magnus explained portaling to their dimension was a mistake. He explained they were looking for a magical item, which only existed in certain worlds. It took time to gain the energy to move to the next, and he required rest for a few days before they could leave.
Alec was suspicious immediately, though it was Magnus who decided to let them stay. He is educated in dimensional magic, some from his own travels and the rest from what he learned from Ragnor. He asked more on the object they were searching for, but the other Magnus was strangely tight lipped about it.
Alec didn’t like it. He asked Magnus to speak to him about it first. The other Magnus cut in, and he smiled at Alec with his gold-green cat eyes. Unlike his own Magnus, this one was more forward with his marks. They shined on Alec and stole the objection right from his tongue. It didn’t go unnoticed how much taller this one was. He was almost taller than Alec, lean and slim compared to his Magnus, who was lean with defined muscles under his jacket. This Magnus has high cheekbones, longer fingers, and his stained lips are covered in gloss.
Alec watched this Magnus walk closer to him, uncaring for the bow he still held in his hand. He barely gave the weapon any mind, chose to focus on him instead. Alec’s head spun, attention locked on the gold-green eyes. His Magnus drove him crazy when his glamor dropped. Alec felt pride when he got Magnus to do it. It took trust and Alec asking to see them, while other times Magnus’s glamor dropped in bed. Magnus so overwhelmed with pleasure that he loses control, and it always sent Alec right off the edge at the sight of them on him.
This Magnus proudly wore them like a badge of honor, and they stole the air from Alec’s lungs. With his Magnus, he’s prepared to see them. Here, with this other Magnus, he’s taken back by their beauty.
This Magnus smirked at him. Alec blushed and set his bow down. Those cat eyes trailed over him, exploring every detail of his body that he could see. It took Alec a minute to notice how close he stood to him, surrounded him with his height and broad shoulders. He didn’t exactly hate it.
“So protective,” Magnus said. Bane. Alec will call him Bane. “Are all Alexander Lightwoods protective of their Magnus?”
Alec looked down at his bow. “Only when mysterious copies of ourselves break into our homes.”
Bane laughed, delighted. “I’m sorry, pretty boy. I didn’t mean to interrupt your alone time. Forgive me?”
Alec looked at him then. His brows furrowed and eyes narrowed, and Bane’s grin widened at the reaction. He did what he could to push down his blush spreading to his neck and chest. Pretty boy. Did he call the other Alec that?
His eyes averted to his Magnus. He was talking to the other Alec with open curiosity. The other Alec was shorter than Alec, and his hair was longer and covered his ears. He was thin with bright blue eyes almost like the color of the ocean. The only light came from the windows, yet the blue stayed vibrant. He said something to Magnus, who brought his head back and laughed.
The other Alec’s eyes darkened with something Alec didn’t like. He stepped closer to the warlock he wasn’t married to, tilted his head and smiled.
Alec’s hand twitched for his bow.
“You frown more than my Alec does,” Bane said, amused.
He reached towards Alec’s jaw, and Alec grabbed his wrist to stop him. His skin tingled the second he touched Bane, and this wasn’t the best idea he had. Bane looked at him as if he wanted to study him, and it didn’t matter what he did. Bane was charmed by his every move.
“Why did you really come here?” Alec asked with an accusing tone. His voice slightly wavered, and he willed the butterflies in his stomach to leave.
“I told you,” Bane responded. He leaned in, and he grazed his knuckle against Alec’s wedding ring. His eyes flickered with mischief. “We were looking for something magical.”
Alec scanned his face for answers, but Bane remained chill as a cucumber. He looked too confident, too pleased with himself or Alec. Alec wasn’t sure which one it was. Alec squeezed Bane’s wrist, and he couldn’t be sure if it was because he was trying desperately to cling onto his authority or the way Bane put space between them.
“My Alec knew he wanted me the first time we met,” Bane revealed with a fond smile. He leaned in, and Alec refused to move away like he wanted to. He didn’t want to give Bane the satisfaction. Although, Bane seemed to be satisfied with whatever he did. Every move Alec made had Bane adjusting to fit him. A stubborn puzzle piece. “Something tells me that’s not how the two of you went. You’re harder to crack, and Alexander?”
Alec couldn’t move. He couldn’t breathe as Bane stepped closer. His cat eyes swam with the playfulness of an imp. He brought his lips to Alec’s ear. Alec’s gaze landed on his Magnus. The other Alec was looking at the pictures on their mantel. Pictures of their wedding and the two of them. The other Alec dropped one, which he should’ve caught easily with his Shadowhunter reflexes. Instead he let out a small sigh and reached for the picture.
He did not just reach for the picture. He bent at the waist, picked up the picture - taking a moment too long - and stood straight. His cheeks blushed pink and smiled bashfully at Magnus, who was openly watching him like a hawk. His eyes glued to the other Alec’s ass.
Alec squeezed Bane’s wrist hard enough to make his bones crack. Bane didn’t wince. He had watched the scene too, but unlike Alec, he didn’t care. He almost sounded proud.
“We do so love a challenge.”
And Bane had meant that.
By the end of the day, Alec wanted to kill his other self. He followed Magnus everywhere. He sat next to him and asked him questions to keep him talking. He’d listen to him with a big, irritating smile, and he always found some way to touch Magnus. He grazed his arm, grasped his shoulder, pretended to laugh so hard he needed to rest his head on Magnus’s shoulder. He flashed those blue eyes Alec frankly didn’t see the appeal to. His face was open and full of interest, and Magnus loved attention. He loved to share stories, including ones Alec hadn’t heard yet. Alec didn’t blame his husband, though he wished Magnus was more aware of what the other Alec was doing.
The other Alec was flirting with his Magnus, and Alec wanted to scream. He wanted to kick the other Alec off the couch when he sat down to eat dinner by Magnus. He wanted to bare his teeth and throw him to the ground. He didn’t, because that would be too far, but then the other Alec smiled smugly at him from where he sat on the other side of Magnus. Alec wanted to yank his hair out.
The other Alec got up for his water, and Alec reached over to tip his plate on the floor. Magnus didn’t notice, but he did look up when the other Alec glared at Alec with the blaze of a million suns.
Alec smiled tightly. “Maybe your Magnus can get that for you.”
Bane didn’t so much as glance at them when he walked into the room. The other Alec pouted at Magnus, who fell for his act and used his magic to clean the mess and gave him a brand new plate.
“Magnus-“ Alec hissed, but arms wrapped his waist and tugged him down on a seat.
It wasn’t a seat. It was Bane’s lap, who smirked at him, cat eyes blazed with amusement. Alec tried to get off, but his arms tightened around him and pulled him firmly against his chest. “There’s nowhere else to sit, pretty boy. I don’t mind.”
“I’m sure you don’t,” Alec said through clenched teeth. He looked at Magnus for help. He faced the other Alec, who was talking too close for comfort. He was pressed into Magnus’s side, and he whispered something in his ear. The other Alec and Magnus both looked at Alec then. The other Alec whispered something else, and Magnus’s eyes darkened, gaze still glued on Alec. Alec leaned away, startled.
“What do you think they’re whispering about?” Bane asked, directly in his ear. He pet Alec’s thigh. Alec shivered, and Bane glanced at the goosebumps on his arms. Alec cursed his traitorous body. “How gorgeous you look on my lap? Pretty boy, you are delectable when you pout. I would be more careful if I were you.”
“Why? What are you going to do?” Alec snapped, but it came out with less heat and more of a challenge than he meant. It didn’t come out anything like he wanted it to, and he didn’t have to look back to see the face Bane was making.
“Make those lips busy,” Bane answered smoothly. He pressed his thumb to Alec’s bottom lip in awe. “They’re soft and full. They would look beautiful around my cock.”
“Nope,” Alec said. He stood on shaking feet, and he pulled his dazed husband off the couch. Upon seeing his frazzled state, Magnus frowned and caressed his face.
“Alexander, are you alright?”
Bane moved to sit next to his husband. The other Alec placed his head on his lap, and Bane cupped his face lovingly. The other Alec met Alec’s burning gaze and flashed him a sickening smile. A knowing smile.
“I’m fine,” Alec snarled. “I want to go to bed.”
“If you’re going to bed,” the other Alec piped in, relaxing like a cat. “May we use one of the extra rooms?”
Magnus nodded. “Of course, let me show you which one.”
“Just pick one,” Alec cut in. He gave the other Alec another death glare, ensuring he knew how much he wanted to strangle him. The other Alec stuck his tongue out at him.
They’re in their own room with the door shut when Magnus turned him. “What’s wrong, Alec? Are you alright?”
“That other Alec wants to sleep with you!” Alec whispered harshly. Magnus didn’t protest, and Alec tensed. “You knew?”
“Yes, he told me. He told me this is why they’re here. He made a deal with his husband. He wanted to add someone else in the bedroom, but he made it clear to my other self he wanted it to be a Magnus from another dimension.”
Alec sucked in a breath. “And you’re going to do it?”
Hurt flashed across Magnus’s features. “I wouldn’t without talking to you. I wouldn’t betray you, darling. I love you so much.”
“How can you say that when you want to fuck another version of me!”
“Because he’s another version of you,” Magnus argued earnestly. His face softened, and he kissed Alec’s cheek. “Two Alecs to make squirm underneath me and watch fall apart? A dream of mine.”
Alec hesitated. He hadn’t thought of that.
Magnus kissed his lips, breathing him in and tasting him. Alec clutched his shirt, and he parted his lips under his. “He could’ve at least talked to me. Ask for my permission or something,” he grumbled between kisses.
Magnus chuckled. “Ask for permission to fuck your husband? Think you might’ve killed him. The two of you fighting? I can’t say I’m not intrigued.”
“Something tells me he doesn’t care what I think.”
Magnus bit his lip, and Alec whined. Magnus pushed him on the bed, and he crawled on top of Alec, kissing from his chest to his neck. Alec sunk into the feeling, letting the heat grow in his stomach. Let it spread across his skin and to his throat.
“The other me wants to fuck you,” Magnus grunted in his ear. He grinded his body against Alec’s, and Alec cursed. “Can’t say I blame him. He’ll see this chest and want to come all over it.”
“Magnus,” Alec whined, and his lips part at a particular press on his clothed cock. He was fully hard and aching.
“He’s too bratty for my tastes,” Magnus went on. He squeezed Alec’s thighs, lifting one around his side. Alec’s mouth fell open. “Not your kind of bratty. You’re bratty until I fuck it out of you. Get these clothes off, and I earn your submission. I like them sweet. You’re my sweet, sweet Alexander.”
“Magnus,” Alec gasped.
Magnus was working on unbuttoning his pants when they’re interrupted by a knock on the door. Magnus sighed and stood from the bed.
The other Alec is at the door. Shirtless and in a towel. His bare chest is defined with muscle. His black hair curves around his chin. He smiled at Magnus. “The shower is giving me problems. Can you help?”
“Your husband is a warlock,” Alec growled from the bed. All the other Alec did was smile and shrug.
“He really does need his magic to get us back,” the other Alec explained slowly, as if Alec was dumb. “Wouldn’t want us to stay longer than needed, hmm?”
This was what Magnus was talking about. He wasn’t just a brat. He was a cocky asshole.
Magnus glanced back at him before he went to fix their shower. The other Alec bat his eyes, smiling, oozing with seduction. Alec considered yelling at him again.
Instead, Alec grinded his teeth and got undressed to go to sleep. He was too worked up to have sex with his husband. The other Alec would find a reason to interrupt them again, and he might actually shoot him with his arrow.
The pent up frustration worsened and by morning, every muscle was coiled like a snake. He goes to the bathroom to shower, and he was dressed down to his underwear when he heard the door open.
“Magnus,” Alec called. He turned to find not his Magnus but the other one. Bane was standing like a statue at the door. His gold-green cat eyes were dark and full of barely contained lust. He was hardly breathing, and he licked his lips.
“Bane?”
“I’m sorry, Alexander,” Bane said. He shook his head, but his eyes stayed dark and wanting. He walked over to Alec, and Alec pressed back into the wall. Bane tilted his head, and Alec shivered.
Bane smoothed his hand over Alec’s chest, raking his nails over the hair. His free hand cupped Alec’s neck, and he ran his thumb over Alec’s bobbing throat. His tall, wide shoulders surrounded Alec, and he felt disconnected to the world. For once, he felt small compared to Magnus - Bane.
Bane pressed his hot mouth to Alec’s throat, tasting the way he swallowed. Alec’s breathing raced. A finger skimmed along his nipple, and he let out a whimper.
“I want to fuck you,” Bane rasped. He kissed Alec's heaving chest, scraped his teeth across his left nipple. Alec gasped, and he grabbed Bane’s shoulders to remain standing. “Will you let me, pretty boy? Be a good boy for me? I’ll make you feel so good.”
“I-I thought this was for the other Alec?” Alec asked, voice shaky and high. Bane took his hand and brought it down to the front of his own pants. The tent he found there was large and heat seeped through the fabric.
“Do you feel what you do to me?” Bane asked. He ran the flat of his tongue over Alec’s nipple, and Alec’s knees faltered with a shout. “I want to make you make so many pretty noises. I want to fuck your throat raw. I want these lips wrapped around my cock. I want to be good for you.”
And, okay, fuck.
Which brings Alec to the present. Alec sits in the corner of the extra bedroom. He wears nothing but his underwear, and he has his hand inside jerking himself off. He twists at the head, squeezing at the base with a quiet gasp.
“You’re being such a good boy.”
Alec looks at Bane heatedly, moving his hand faster, and taking in the view in front of him.
Magnus is there on the bed fucking the other Alec at a unrelenting pace and vicious strength. A hand around his throat, cutting off air, and the other Alec's face is a bright red. His mouth is slack, for once not rambling or making demands. Telling Magnus he’s not fucking him hard enough, or he was falling asleep at his glacier pace and the overall boring sex.
Alec stared, stunned at the way another form of himself could act like this. How desperate and decadent the man is. His ass was red from Magnus slapping his ass. The first spanking made the other Alec sputter and whine, and meet Magnus’s thrusts with fervor.
Bane stayed mostly out of it. He watched silently as Magnus learned to play his husband like a toy and control him. The other Alec already came once, and he showed no sign of exhaustion. He does now, completely limp and at Magnus’s mercy. Hand around his throat and slapping his ass, while he fucks the life out of him. No sassy remarks left.
“Come here,” Bane says to Alec.
Alec walks on weak legs to the bed. Once he gets there, Bane grabs his chin, and he’s manhandled to face the other Alec. Up close, he can see how out of it he is. His cock leaks on the bed, and he’s close to coming again.
Bane thumbs his bottom lip. Eyes dark like the night. “Kiss him.”
Three hours ago, Alec wanted to punch the other Alec’s face in. Here, he can’t deny the sight of his other self getting used and fucked into peaceful silence makes his cock ache painfully.
Alec kisses the other Alec. His mouth is slack, and he doesn’t kiss back immediately. Alec kisses him again, and he hears his husband groan. This time, the other Alec kisses him back, light as a feather and breathing hard.
“Fuck,” Bane grunts.
The other Alec looks at him, and his eyes are glazed over in want. He moves to lean on his arms and holds out his tongue.
Bane strokes his cock and brings it to his parted lips. He swipes the head oozing with precome over his upper lip, right before sinking inside. The other Alec takes half of his cock in his mouth, and he closes his eyes and moans.
Alec watches, growing dizzy with boiling heat in his veins. Magnus let go of his throat because of the reach, switching to pulling harshly at the hairs on his nape. His other hand digs into the other man’s hips, leaving dents and bleeding marks.
The other Alec doesn’t mind. His cock is hard and drooling on the blankets, and there is pure bliss on his face. Alec can’t believe it. He couldn’t imagine being treated this way, but it looks like this Alec craves it like this. Maybe not every time, but he loves being put in his place and used.
The other Alec comes, Magnus deep inside him with sharp thrusts. Bane withdraws his cock so he doesn’t choke, and his Alec whines and cries out. Magnus comes soon after, holding Alec down. Bane pets at his husband’s hair and calls him beautiful. He whimpers in response, and it’s different than how Alec is used to.
The other Alec actually does cry when Magnus pulls out. Magnus shushes him, and he leans down to kiss his cheek. He puts his softening cock back into his hole, and he guides them to lay down. The other Alec snuggles into his hold, drinking in his comfort and warm arms. Alec doesn’t feel jealous at the sight. Magnus Bane will always be there for Alexander Lightwood. Whether it’s his Alec or not.
His cock is still hard, and his body thrums with barely contained desire. Bane sits back on the pillows and gestures for him with painted nails. Alec doesn’t remember removing his underwear, but he’s naked now, and he climbs on Bane’s lap. Bane pets at his sides in soothing circles, and Alec aligns Bane’s cock to his hole and sinks down.
Alec’s mouth falls open, and he whimpers with every inch he takes. Bane’s cock is a little longer but not as thick, and he rests his hands on Bane’s chest.
“Take your time. Decide the pace.” Bane sits up to kiss his neck and jaw. He pets at Alec’s sides, captivated by him. “You feel so good. Such a good, pretty boy.”
Alec whimpers, moving at a languid pace as sharp pleasure races through him from Bane’s cock inside him. Bane kisses his chest, petting his muscles and runs his fingers over his nipples. He twists them gently, flicks them and drives Alec mad with need.
“God, I love these,” Bane purrs, cat eyes bright, focused on Alec’s chest. He licks the hair and sweat covered skin, and Alec moans his name, and his cock grazes his prostate and his voice rises.
He moves faster, fucking himself until he comes hard between their sweaty bodies. Bane praises him, far kinder than he was with the other Alec. It must mean his other self doesn’t like it rough every time.
Bane holds him as he fucks up into him until he comes with a grunt. His cat eyes are trained on him, and it’s almost too much to have them on him the whole time. He might get hard again, and he was too exhausted for round two.
The bed is full with all four of them. Bane holds him close, delivering sweet kisses to his shoulder and chest. He wasn’t kidding when he said he liked his chest apparently. Alec closes his eyes and falls asleep quickly.
The bed is missing two people when Alec wakes up. There’s a short message written on a piece of paper. Alec reads it and blushes.
Thank you for letting me borrow your husband. Sorry if I made you mad. My Magnus wanted to see how mad I could get you. He thinks every Alexander Lightwood is possessive. He is right.