A/N: This was meant to be posted a few weeks ago when Cassandra Clare said it was Magnus' birthday but life got in the way but here we are!

Disclaimer: I do not own Mortal Instruments.

Magnus Bane was curled up in bed, completely exhausted. The past few weeks had been absolute mayhem for both he and Alec. Between Magnus' duties as High Warlock of Brooklyn and Alec's responsibilities as Head of the New York Institute, it was impossible for them to catch a break. They hadn't been on an actual date in at least 3 weeks and only really saw each other at night, when both were worn out from their days of dealing with demons and annoying clients.

Groaning at his alarm, Magnus rolled over, pulling a pillow over his head expecting the other half of the bed to be empty but he was pleasantly surprised to be met with a warm body.

Alec wrapped an arm around Magnus and pulled him closer into his side. He rubbed circles into the warlock's back.

"Morning, Magnus," Alec said pressing a light kiss into Magnus' hair.

All Alec got in response was a mumbled morning earning a chuckle from the Shadowhunter.

Magnus picked his head up and glared at Alec, who seemed far too awake.

"How did I fall in love with a morning person?" his hair was uncharacteristically messy from sleep and his face was clean of make-up.

Alec kissed Magnus fully on the mouth, earning a satisfied moan from Magnus.

"Right, because you are absolutely the cutest," Magnus hummed and leaned forward to peck Alec's lips before sitting up and stretching his arms above his head letting out another yawn.

"Cutest? Really?" Alec asked with a raised eyebrow, "I kill demons for a living and you insist on calling me cute?"

Magnus shrugged and turned to face Alec fully, "Would you prefer sweetpea? Pumpkin? Cupcake? Muffin?"

Alec looked horrified, "Please no. And why are they all foods?"

Magnus laughed and leaned into Alec's side, "Fine, I'll add those to the list of adorable but rejected pet names for my dear Alexander." Magnus paused a moment, relishing in the rare quiet moment.

Alec sighed knowing he was going to have to break the moment, but he knew that what he had planned would definitely make up for all the time they've been spending apart. He only hoped that Magnus would be willing to go along with what he has planned for their night.

"I'm sorry Magnus but I have to get going. The Institute calls," Alec said tightening his grip around his boyfriend. He had missed getting to spend uninterrupted time with Magnus the past few weeks.

Magnus whined and latched onto Alec, wrapping his legs and arms completely around him like a koala bear would. He missed his boyfriend terribly the last few weeks and he "forgot" to mention to Alec that today was his birthday and it tended to make him a little more clingy and reluctant to work. He used to love celebrating his birthday, but now it only served as a reminder that he would one day lose Alec, unless they found a solution to their immortality issue.

"Do you have to go?" Magnus pouted.

"Unfortunately, yeah. But I promise I will be back as soon as possible, okay?" Alec asked leaning in close to Magnus.

Magnus sighed dramatically, "Okay. Whatever will I do without my love around?" He sighed again for good measure.

Alec fondly rolled his eyes, "I'm sure you'll find something. Don't you have clients?"

"Only one today, thankfully."

Alec kissed Magnus and then got out of bed walking towards their bathroom to get ready for the day. Magnus rolled over in bed, taking up all the space while Alec got ready. They kept a light conversation going as Alec was dressing himself and getting everything together. Once he had everything, he kissed Magnus once more and grabbed his bow and arrow.

"See you later, Mags. Love you!"

"Love you too, Alexander. Be careful, darling and come home in one piece." Magnus called as Alec stepped through the portal Magnus conjured up for him into his Institute room.

When Alec stepped through the portal into the Institute, he found Izzy waiting for him with a big smile on her face.

"Hello big brother!"

"Hi Iz," Alec said and hugged her briefly.

"Sooooo," Izzy said grinning at him.

Alec raised an unamused eyebrow, "What?"

"Are you ready for tonight? Have you told Magnus yet what you have planned for the following week?" she excitedly grabbing onto his arm as they walked to the control center.

"No, it's meant to be a surprise," Alec explained, grabbing a tablet as they walked to check for any demon activity that needed attending to.

"But how are you going to pull it off? Don't you need a portal?" Izzy pressed on, determined to get all of the answers on her brothers surprise for Magnus, "And also, why the surprise? Is it a special occasion?"

Alec debated whether or not he should mention it was Magnus' birthday. There had to be a reason no one knew about except for Magnus' immortal friends so Alec settled for shrugging.

"We haven't spent much time together, I thought it would be nice."

Izzy cooed, "Look at you big brother! You've turned into such a big softie."

Alec blushed and chose not to answer. Instead, he immediately got to work, delegating tasks and making sure everything was running smoothly at the Institute. After that was all settled, he went to find Jace in his room.

When he got to the door, Alec knocked knowing his parabatai was in there but not knowing if he was with Clary, "Jace?"

"You can come in Alec," Jace yelled through the door and Alec rolled his eyes as he walked in and saw his brother simply on his bed doing nothing.

"I need you to watch over the Institute this week," Alec said.

Jace sat up and regarded his brother, "Sure. Why?"

"Magnus and I are going on a vacation, it's a surprise for him, so please do this for me Jace?" Alec asked.

"Yeah, sure. You two deserve a break. I'll call if anything important or urgent comes up. The Institute is in good hands with me." Jace smirked arrogantly.

Alec regarded Jace skeptically, "On second thought, maybe I should've called Lydia in."

Jace threw a pillow at Alec's head, "That's not funny and you know it! I'm very capable of handling the Institute for a week. Now go, be gone!"

Alec turned to leave, shaking his head fondly at his parabatai.

"Don't do anything I wouldn't do!" Jace called out.

Alec raised an unamused eyebrow at Jace knowing full well all that Jace has done in his life.

Jace laughed and wink, "Enjoy the alone time, man. Be safe and use protection"

"You're ridiculous but thanks, Jace." Alec said and left, making his way back home to the loft.

When Alec got home, he found Magnus asleep on the couch with a book open in his hands. He smiled at the sight and quietly snuck into their bedroom to make a quick call to Catarina to make sure everything was set up. He then changed into something a little more comfortable, took his other gift for Magnus out of his dresser drawer and made his way back into the living room to wake up his boyfriend.

Alec crouched down besides Magnus and took the book out of his hands, he then smoothed back his hair and pressed a gentle kiss to his forehead.

"Magnus," Alec whispered, watching as Magnus' eyes fluttered open.

"Alexander!" Magnus said, suddenly wide awake. He surged forward and kissed him passionately.

Alec chuckled when they pulled apart, "How was your day?"

Magnus sighed, "Boring. My only client was a pain in the butt so I decided to relax by reading but I guess I dozed off. How was yours darling? Any demon injuries that need healing?"

"I didn't go hunting today. I told you it would be a quick day, I wanted to be home with you as soon as possible," Alec said blushing and looking nervous.

Magnus reached out a hand and caressed his cheek, "What's the matter darling? You look nervous?"

Alec sat besides Magnus and pulled the gift out from behind his back. Magnus eyed it suspiciously.

"What's that?" Magnus asked pointing at the box in Alec's hand that looked awfully like a ring box. Alec noticed that it probably looked like an engagement and immediately began to ramble.

"Oh my gosh, I didn't even think that this would look like a proposal. I promise it's not. I mean not that I don't want to marry, I do, but one day, we have been together only about a year, and of course I love you and know that you're it for me and no one else will ever come close to you in my eyes, but I,"

"Alexander, love, breath. I feel the exact same way. One day, but not today. Now relax and tell me what you got there," Magnus said wrapping an arm around Alec's waist.

Alec blushed and smiled sheepishly, "Right, sorry. Don't be mad, but I was talking to Raphael the other day and he may have let it slip that today is your real birthday."

Magnus immediately tensed but Alec pushed forward, "Magnus, he didn't mean to. Don't be mad at him, if anything be mad at me for getting it out of him. But, I just wanted to do something special for you Magnus because you're always doing for others and you deserve the world and to be taken care of and I'm going to try my damn best to make sure I give it to you and make sure that you feel so very loved because you are incredible. So, this is only part one of your gift. Here," Alec said and handed it to a watery eyed Magnus.

Looking down at the box, Magnus slowly opened it and gasped when he saw the beautiful ring sitting inside. It was an arrow with gold gems scattered throughout it and there was one that was shaped like cat eyes. It was a perfect combination of the two of them. He looked up at Alec with tears in his eyes as he slipped it onto his pointer finger, making sure to continue to leave his ring finger open for when their engagement finally came, though Magnus swore he would get down on a knee first.

"Alexander, it's beautiful. Thank you," Magnus leaned in and kissed him with a kiss full of love.

"You're welcome, Magnus. I asked Catarina to do some sort of spell on it so that it's like my arrows and you'll always have a piece of me with you to draw on my strength. Together, we shrunk down one of the arrows you made for me to make this." Alec said shyly.

"It's perfect, like you." Magnus smiled lovingly at Alec, who continued to surprise him everyday.

Alec grabbed Magnus' hands and pulled him into a standing positon, "Now, for part 2."

Magnus followed Alec as he led them into their bedroom.

"Alexander, you know I will never complain about you taking me to bed but,"

"Magnus!" Alec exclaimed extremely flustered and blushed.

"I'm teasing, darling. I love that you still get so flustered with my flirting." Magnus said with a grin as Alec rolled his eyes and grumbled about hating his blush.

"Right, well, here we are," Alec said and turned them so Magnus could see the glowing portal in their room.

"Is that a portal?"

"Yes."

"And you put it there?"

"Well, I had help obviously."

"Obviously."

They stood in a silence before Magnus turned to Alec, "Are we going somewhere?"

Alec looked down and scratched the back of his neck nervously, "Since it's been hectic lately and we haven't had time for us and it's your birthday I wanted us to, uh, go on a vacation for a week. I checked your calendar, sorry for snooping, but I knew the clients you had appointments with so I reached out, explained to them I wanted to surprise you, don't worry I didn't mention it was your birthday because I figured you didn't like people knowing, and I got them to reschedule. I left Jace in charge at the Institute and though I may regret that later, I knew this could work. Is that okay with you?"

Magnus stared at Alec with tears in his eyes again, except this time, he let them fall.

Alec mistook them for Magnus being upset and immediately wiped them away, "I'm sorry! You hate it, I shouldn't have snooped and done that without your permission. We don't have to go, I can call Cat to close the portal."

Magnus put a finger on Alec's lips, "I'm not upset or mad at all Alexander. I'm just emotional and happy because no one in all my years of living has ever cared so much for me to do stuff for me or to get me gifts simply because they loved me. You amaze me everyday and I will never stop wondering what I did to deserve you. I didn't tell you about my birthday because it reminds me of my immortality and that I always leave my loved ones and I can't bear to think of losing you, Alexander. I know we've talked about immortality and that we said we'd revisit in a couple years and I promise we will because you are my everything darling. I love you so much. Thank you for being you." Magnus completed his little speech with a searing kiss that left them breathless.

"I love you too, Magnus." Alec whispered.

Magnus then smiled brightly and turned to the portal, "So then, where are we disappearing to?"

Alec smiled and grabbed Magnus' hand pulling him towards the portal, grabbing a suitcase he left by it.

"I remember you talking about some island you own and figured that would be the perfect get away. We can be away from this cold New York December weather and we can enjoy time of just us."

"That sounds perfect! Come on, I can't wait to show around. There's so much we can do to relax. This island had to be my best investment."

Alec chuckled at Magnus' enthusiasm, "Alright, then. Let's go! Oh and remind me to send Cat a thank you for all her help with this."

Magnus flicked his wrist and blue sparks emitted from his hand, "Done! I sent her a beautiful gift basket filled with lots of goodies she loves." Magnus then pulled Alec through the portal and they were standing on the porch of a villa over looking the ocean. The sight was breathtaking.

Alec wrapped his arms around Magnus and kissed his cheek, "Happy birthday Magnus."

"Thank you my love. Best birthday ever, Alexander." Magnus smiled and the two let out a breath of relief knowing they had a week at this beautiful island with no interruptions.