Malace || Shadowhunters || Malace || The A and O of Love || Malace || Shadowhunters || Malace

Title: The A and O of Love – The Parabatai and their Warlock

Fandom: Shadowhunters / The Mortal Instruments

Disclaimer: All rights to the Shadowhunters reserved to Ed Decter, the books the show is based off and its characters belong to Cassandra Clare. This fanfiction on the other hand is entirely mine. No money is made with this, though reviews are more than welcomed.

Warnings: threesomes, shounen-ai, ABO dynamics, mating, explicit intercourse, anal, oral, double penetration, rimming, knotting, sex toys, shoujo-ai, hetero

Main Pairing: Magnus/Alec/Jace

Side Pairings: Simon/Isabelle/Clary, Robert/Maryse

Shadowhunters Characters: Jonathan Christopher 'Jace' Wayland, Magnus Bane, Alexander Gideon 'Alec' Lightwood, Isabelle Sophia 'Izzy' Lightwood, Clarissa Adele 'Clary' Fray, Simon Lewis, Maxwell Joseph 'Max' Lightwood, Robert Lightwood, Maryse Lightwood, Luke Garroway, Lydia Branwell, Camille Belcourt

Summary: Alec finally finds the alpha of his dreams and maybe, with Magnus' help, he will also finally get the omega he has always had his eyes on. If only there weren't those two strangers around and all over Jace now – the girl and the mundane. Thankfully, Alec has a cunning sister.

The A and O of Love

The Parabatai and their Warlock

Chapter 1: The Perfect Little Omega

"Now all that is missing is the perfect little omega to complete us, my dear..."

Alec grunted in agreement as he leaned into his mate's touch. He had only recently gotten together with his alpha, his Magnus. And Magnus' words were true, all they were missing now was the perfect omega to complete them. The problem was that Alec knew exactly who the perfect omega was. The one he had picked when he was young, when he had first realized he was a beta.

There were three types of magical beings – whatever race you were part of, Shadowhunter, wolf, vampire – you were either born a dominant alpha, a submissive omega or the calm, balancing middle of a beta. Idealistically, a mated union consisted of a triad – an alpha, a beta and an omega. Nowadays laws were more casual, accepting mated pairs of only two, though pairs of the same orientation were still frowned upon. And mated pairs of two were still somewhat hopefully expected to find their third to complete them. When Alec Lightwood realized he was a beta, he knew he wanted both, he wanted an omega he could cherish and an alpha who could protect them both.

"I know the perfect omega", admitted Alec after a beat, because he didn't want to start their still fresh mate-bond with lies or half-truths. "But he's in... denial about his status."

"Go on. You're making me curious", urged Magnus on, eyes dark.

"Jace", stated Alec, like ripping off a band-aid.

"I assumed he was an alpha himself", admitted Magnus surprised, looking at his mate.

"I only know because we're parabatai", explained Alec, running a hand through his hair. "Because our link... we shared thoughts and intimate secrets. I realized it the first time and confronted him. He admitted that he was hiding it, because he wanted to fight at the front. Omegan Shadowhunters aren't allowed on the front, to not risk possible younglings and lineage. I promised to keep his secret though. He's... hiding his scent with a rune and most who meet him assume he's covering up his alpha pheromones with said rune, so he wouldn't be controlled by an alpha's unmated and unbound urges. But whenever we merge, I get to share into this... vulnerable and soft side of his and..."

"And that was what made you fall in love with him", drawled Magnus out, raising one eyebrow at Alec's guilty and surprised look. "Don't think yourself so clever, Alexander. I've known it from the start, that you looked at him with heart-shaped eyes. But when you chose me as your mate and when I still assumed him to also be an alpha, I thought... you had made your choice. Now..."

"I made my choice", declared Alec firmly, looking deep into Magnus' eyes. "I chose you. But... if there was the option... He's not your average omega, but..."

"I always liked a challenge", stated Magnus with a smirk, kissing Alec.

/break\

Now that Magnus and Alec were bonded, Magnus spent quite a lot of time at the Institute, being welcomed by most. The matebond was something sacred and no one would dare to argue it. Magnus understood the reluctance coming from Maryse and Robert Lightwood; he took it as parental concern. He knew Maryse was not the warmest or most loving mother, but he still decided to give them this benefit of doubt. They were his in-laws now, after all. What an amusing thought.

When he couldn't find Alec in their room – it really was their room at this point considering Magnus spent as much time there as Alec spent time at Magnus' place – the warlock went to the second most obvious place to find his mate. The training room. Alec spent a delightfully high amount of time there, mostly shirtless and sweating. A very much appreciated sight.

However, when Magnus rounded the corner and entered the training area, he found a sight he had faced before and that had never intrigued him too much. Alec was indeed training and shirtless, but he wasn't alone. An equally shirtless Jace was with him and the two of them were sparring. So far, the sight had bothered Magnus slightly since he had been under the impression Jace was a rivaling alpha that Alec held affections for. Now that Magnus knew Jace wasn't an alpha, that Jace was indeed an omega and instead of a threat to Magnus' matebond, he could be an addition, well. His view on the scene in front of him changed significantly.

There really was no other time – aside from his and Alec's alone time as mates – that had Alec quite as happy and carefree as he was when he was alone with Jace. No nagging sister or irritating newbies. Just the two parabatai. It pleased Magnus' inner alpha to see his mate that happy (it also pleased his inner alpha to see his mate all sweaty and half-naked, obviously). And as hard as it was for him to tear his eyes away from Alec, he decided he should really pay a bit more attention to Jace Wayland. After all, he was the omega Alec desired and Alec was Magnus' mate which meant Alec would get everything he could ever want, as long as it was in Magnus' power to obtain it – and if not, then Magnus was going to find a way to obtain it.

There was absolutely no denying that Jace Wayland was attractive. He was strong, well-trained, handsome. If Magnus had any say in things, the blonde would let his hair grow out maybe to his shoulders. It'd take the strict edge off and frame his handsome face nicely. He had intense eyes and sharp cheekbones. Very tempting indeed. Magnus paused a little as he took in Jace's face. There was an unbound joy sparkling in his blue eyes. Magnus had never seen that look on the blonde before. When he had said that he knew this look on Alec's face from his training with Jace and from his time alone with Magnus, that was also implying that he had never really looked at Jace during those training sessions between the two parabatai. Every time he had noticed Jace, had paid attention to the blonde, the Shadowhunter had been the leader of the team, the strong one in charge, the alpha male of the group; quite literally so. There was a reason Magnus and most likely everyone else had believed Jace to be the alpha he was posing at, because Jace was damn good at it.

But this? This cheeky little grin on his lips (very kissable lips, now that was something Magnus had noticed when he had first encountered Jace. He had a pair of utterly kissable, plump, dark-rosy lips that would definitely also be good for other things aside from kissing). The sparkle in his eyes. The swift, elegant movement with which he attacked and dodged. Magnus smiled amused as he recognized that for what it was. An omega's playfulness. Omegas were known to enjoy playing around, playful fights like this were part of courting and foreplay in many races. There was a softness to Jace when he was playing in such a carefree way with Alec. If that was a fraction of the omega Jace was hiding, then Magnus could understand Alec's fascination.

Waving a sparkling hand, Magnus summoned an elegant armchair and got comfortable to truly enjoy the show. He raised one perfect eyebrow as he spotted the rune that covered Jace's heritage. It was square on his lower back, disappearing left into his (far too tight but certainly perfectly cut) jeans. Magnus licked his lips absentmindedly as he watched Alec block Jace's next hit and Jace in return knock Alec off his feet to pin him to the ground. The warlock's eyes shone brightly golden as he stared at Alec on the ground and Jace straddling the beta's waist, hips raised a little and thus his rather tempting butt pointing nicely into Magnus' direction. Oh my. How dare Alec with all of his Alecness had distracted Magnus from that magnificent piece of ass?

"And I win again. I believe that's sixty to fifty eight", declared Jace with triumph in his voice.

How cute. That clear pride in himself made Magnus nearly want to go over and pat Jace on the head like a little puppy that had performed a trick. Mh, now that was a nice idea. Puppies. Magnus had always wanted pets and the way Alec and Jace were playing around on the ground right now did remind Magnus of a Border Collie and a Golden Retriever playing. Very cute.

"Someone's enjoying the show."

Magnus hummed in agreement, not sparing the other Lightwood a proper look because his eyes were needed on the scene in front of him. Isabelle laughed as she sat down on the armrest of the chair. Magnus liked Isabelle alright; she was the most fashionable of the Shadowhunters and her attitude was very appreciated too. She clapped loudly and cheered Alec on for a moment, gaining both boys' attention. They turned to look at at them and both flushed a nice red. Alec, amusingly enough, often did when he noticed he had Magnus' undivided attention on him. It was endearing. With Jace, it was most likely the embarrassment of being caught by others while indulging in his omega-nature. To Magnus, with the knowledge of what Alec had shared with him, knowing what to look for and intruding on them unnoticed, it was quite clear to recognize the sparring between parabatai for what it was. It was most likely one the few times that Jace embraced his omeganess.

"Iz, I already lost", sighed Alec and leveled a glare at his sister.

Isabelle just grinned broadly at him. If Magnus had to bet, he would say that she had only cheered to get their attention and make them notice their audience. Jace scrambled off of Alec and went for his shirt. What a shame. What was it with the delicious Shadowhunters and covering themselves up while Magnus was quite clearly still in the middle of appreciating the sight? Alec too put his shirt on before walking over to his alpha and sitting down on Magnus' lap to steal a kiss.

"Mh... Is there a sequel to this? It was quite enjoyable", hummed Magnus softly.

He caught Alec's lower lip between his teeth, tugging a little and making Alec gasp. Out of the corner of his eyes did Magnus see Jace nearly fleeing from the room. How adorable. Magnus was going to have so much fun flustering that one. Grinning pleased, he wrapped his arms around Alec's waist and pulled him some closer, lips trailing to kiss Alec's earlobe.

"I think I approve of your choice in omega", whispered Magnus gently.

Alec made a more than delighted sound at that, nuzzling into the warlock. Now all they needed to do was convince Jace of this being a good idea. Surely Magnus could think of something.

/break\

The biggest obstacle in obtaining Jace Wayland were his newest little add-ons. The by now former human Simon Lewis and the annoying little newbie Shadowhunter Clary Fairchild. There was a reason Alec had always been annoyed by Clary, right from the start. She took up way too much of Jace's time, she also caused too many problems and cared far too little about the rules. She had also been the cause for the first outfalls between Jace and Alec. Simon, he hadn't minded as much. He was more like a nuisance that could be ignored. But now that Simon Lewis was not a mundane anymore, he had somehow become a regular of their team too. And since Simon was practically attached to Clary and Clary was practically attached to Jace, Simon by default also spent a lot of time with Jace. And while Alec had the larger problem with Clary – who annoyed the living underworld out of Alec by merely breathing these days – Magnus was starting to develop a big dislike for Simon. It was a bit of a surprise for Alec to see Magnus jealous. But then again, Magnus was an alpha and Simon had become an alpha by becoming a vampire. Alphas while prone for jealousy in general, were overly territorial about omegas. So for Magnus, who had now decided that Jace was going to be his, it did not sit right to see Clary and especially Simon all over Jace.

Clary hadn't presented yet and it was hard to tell such things, but they were pretty sure there was no way in the underworld for that girl to be an alpha. Still, Alec's horrifying horror-scenario was that the redhead would present as a beta and those two would snatch Jace up. Magnus disapproved.

"Darling, how do we get rid of them?", hummed Magnus thoughtful.

"Getting rid of them has become essentially impossible at this point", stated Alec from where he was leaning against Magnus' chair, arms crossed as he watched Simon and Jace bicker while Clary stood beside them and laughed. "They're part of our team. Besides, I thought you liked Clary."

"I'm fond of her", drawled Magnus. "Though I was more fond of her when she was a child and before she was all over our omega, darling. But this is going to be a problem on the longer run."

Alec sighed in agreement. The six of them had become a team – as unlikely as a team of four Shadowhunters, a vampire and a warlock was. The best team the Institute had to offer, in fact. So internal conflicts were a problem. They had been a problem right from the start; Jace and Simon had edged on, Clary and Alec had not gotten along at all. But it was growing more intense now that Alec and Magnus were mates and now that they, together, had decided to court Jace.

"You two...", drawled Isabelle accusingly as she came up behind them. "You're up to something. I just can't figure out what. And I hope it's nothing too bad."

Magnus feigned innocence as he turned to look at her. "Me? Up to something? I would never."

Even Alec snorted at that. Traitorous mate. Isabelle rolled her eyes at him as she leaned against Magnus' chair from the other side, looking critically at her brother. She had been happy when he had decided to become Magnus' mate. She had thought he had moved on from his years-long obsession with Jace. But for the past week, Isabelle had found Magnus lounging around the Institute a lot. Still with Alec or watching Alec, but when with Alec, the two of them were mostly focused on Jace. The glaring-matches between Alec and Clary had increased, while curiously enough there seemed to be a kind of tension between Magnus and Simon these days. Oh, Isabelle wasn't dumb, she had quite the suspicion what exactly was going on here. Isabelle squinted at Alec accusingly and her brother just shrugged innocently. There was nothing innocent about this.

"Don't mess this up, Bane", hissed Isabelle instead, eyes focused on the trio they were observing. "Alec is my brother, but Jace is like my brother. There's a reason he does what he does and if you hurt him, I will scratch your eyes out with my perfectly manicured nails."

Magnus chuckled a little amused. "I wouldn't have it any other way, Isabelle. Those nails are terrific, by the way. You have to tell me who does them for you."

"Oh, there is this amazing little spa. I'm dragging Clary there next weekend. You should come."

Magnus narrowed his eyes. This was not a question, it sounded more like an order. His inner alpha did not appreciate being ordered around by a beta that was not his beta. But if there was one thing about Isabelle Lightwood that he had learned in the past months of working with this team, it was that Isabelle had a reason for everything she was doing and it generally was beneficial for all.

"That sounds like a wonderful idea", replied Magnus curiously.

/break\

Magnus and Isabelle were sitting in the sauna together. One thing they had in common – aside from their natural grace and impeccable taste – was their confidence in their bodies and aware of their looks. Clary had opted out of the sauna, because out of some unfathomable reason, the girl was flustered and embarrassed about an all-gender-sauna. Even though, really, between two primary genders and three secondary genders, it was the most practical thing for a spa to just have unisex saunas. Contrary to his initial thoughts, Magnus was actually enjoying the weekend so far. The past months of fighting Valentine with the team had been very exhausting. This was nicely refreshing.

"You know having Jace as your omega is never going to be the way... it would be with other omegas", stated Isabelle casually, eyes closed and head tilted back as she soaked in the heat.

Magnus hummed in acknowledgment. "I expected no less. Easy is boring, my dear Isabelle."

"I'm not just talking about not easy", corrected Isabelle, unusually stern. "There is a story that Jace likes to tell. About himself and his pet-falcon. You ever heard it?"

"It sounds intriguing", chuckled Magnus, picturing a young Jace with a pet-falcon.

"When he was six, his father bought him a falcon and told him to tame it. He did. He tamed it, gained its trust through claws and nibs and bleeding cuts. He cared for it, like omegas are known to. The falcon became his friend. Then, when it was tame, he showed it to his father and... his father broke the bird's neck. Do you know why?", asked Isabelle, staring up at the ceiling.

"Because he was a sociopath?", offered Magnus in a slightly high-pitched voice.

"Because the task had been to tame it, not to love it. Because loving makes you weak. Because he didn't want an omega son. He didn't want a weak, caring omega as his son. This man... broke Jace in a way that I'm not sure can ever be put together again fully", replied Isabelle gently. "Alec and I, we worked very hard for many years to crack the walls of facade that Jace had built up since then, but even we rarely get to reach his omega-nature. He has buried it so deep, I wonder if he's even capable of listening to his own instincts anymore, Magnus."

"Let that be my worry then", stated Magnus simply. "I am centuries old. If there is one thing I have, aside from my good looks, charming personality, impressive magical abilities and amazing taste, it's patience. I'm not backing off from this challenge. And neither is Alec."

Isabelle hummed noncommittally. "Then when are you going to actually make a move? You are so busy starting one-sided cock-fights with Clary and Simon that you're neglecting Jace."

"Well, before you can start anything, you need to eliminate the competition", drawled Magnus.

"...What in the world are you talking about, Bane?", asked Isabelle incredulously, looking at him.

"Oh please, the young Fairchild? She's been hanging off Jace's arm from day one and now that her little pet mundane turned into an alpha vampire...?", huffed Magnus displeased.

Isabelle had the audacity to laugh at Magnus, prompting the warlock to turn and glare at her. "You think Clary and Jace spending so much time together is because they want to court...? Oh boy."

"Oh boy?", echoed Magnus and sat up straighter. "What is it you know and I don't?"

Isabelle offered him a mischievous grin. "There is a rune that Jace and Clary share. Clary has been a Shadowhunter for months now; do you truly believe she hasn't presented yet?"

It took a moment for that to sink in and Magnus' golden cat-eyes widened. "She is an omega."

"She's the first omega in Jace's life. That's why they're getting along. Somewhere, very deep down, Jace does still have some omega-instincts and one of the strongest instincts for omegas is to bond with each other and tend to the pack together. Clary doesn't know; she also doesn't know the instincts enough to realize it. I think Jace doesn't really know either. Perhaps he even is telling himself that he has romantic feelings for Clary, I don't know. But Clary sure as hell doesn't."

"And what makes you so sure? Jace poses rather convincingly as an alpha", argued Magnus.

Isabelle offered him a smirk as she ran a well-manicured nail up her own thigh. "Because she has known her perfect alpha even before he was an alpha or she was an omega. Clary and Simon were always meant to be. They're just still too new to all of this; Simon is still adjusting to being a vampire. Clary is taking it all rather well, but she has no idea what it all means in the end."

"How do you know so much, Isabelle Lightwood?", asked Magnus inquisitively.

The beta's smirk just turned more mischievous and Magnus did the math. His eyes widened in surprise. Oh, those Lightwoods were feisty. So she had chosen her own mates and was, just like Magnus and Alec, watching from the sidelines. Observing, for now. Biding her time. He had wondered why she had broken it off with her long-time companion the elvish beta. What an interesting twist of events. He couldn't wait to tell his mate about this.

"Now, I think we're late for our massage-appointment", stated Isabelle.

Magnus couldn't wait to tell his mate – after this weekend. He smiled at her and stood up, stretching leisurely before offering her his arm. She returned his smile in a similarly wicked way as the two of them left the sauna. They still had a hot stone massage appointment in approximately half an hour and dinner was waiting for them too. If Isabelle was going to have her way, they would also drag Clary to a manicure and facial, though so far the redhead had not exactly been in favor of that.

"And you truly do not mind if I were to keep both Alec and Jace?", asked Magnus curiously.

"I've spent the past years living with them and I know the puppy love my brother has always held for Jace. Not to mention... Jace could use a stubborn enough alpha to show him that love does not have to be a bad thing", replied Isabelle mischievously. "You prove to be quite stubborn, Magnus."

Author's note: Sooo, new fandom! I really liked the movie back when it came out, but kinda forgot about the whole thing when there wasn't a follow-up movie. Then the show came around - and well, I really enjoy that. Been in love with Jalec since the movie... but... Magnus... magnificent bastard. So I did the math. Threesome! ^o^v

This story is going to have 10 chapters and if you wanna know when it'll be updated - you can find my updating schedule on my profile!

Next chapter is going to feature Magnus sharing his new intel with Alec and our warlock will be treated to see a rather omega-y side of Jace ;)