Alec thought he was going to scream at what Jace said next. "Wait…I just have one question. I swear it's serious for once."

Magnus collected himself first, his voice drowning in amusement. "What's that, Herondale?"

"I'm just honestly curious here, but who is going to take whose name?" Alec was speechless, that was something he hadn't really thought of yet. He had been so focused on the immortality part that he hadn't really been thinking of the details of the wedding itself yet.

He was only slightly surprised when Magnus cleared his throat and took over the conversation. "I think I can probably go ahead and clear that question up pretty quickly," he turned to Alec. "If that's okay with you?" Alec was too shocked at the turn in the conversation to do anything other than nod.

"I've actually thought about this a lot," Magnus began, his face lit up by his smile. "And I've decided that I, without a doubt, want to become a Lightwood." He paused momentarily to let his words sink in. "That is, I would like to, if you will have me."

Alec quickly spoke him mind on the matter. "Magnus, don't be insane. Of course we would love to have you. But I'm just curious as to what made you decide you want to."

Magnus looked smug, as though he knew so much more than any of them did, which in this case he did. "Well, Alexander. I started thinking about exactly what this marriage meant to me, about what you mean to me. Then it hit me, that you had said you wanted to give me a family. It hit me that you had been so right about what I wanted. A family has always been all I've ever dreamed of. So it was then that I decided that I wanted nothing more than for everyone I ever meet to know that I am part of this family. I want everyone to know that I am yours. Forever."

Everyone in the room was speechless. They all seemed too touched to say anything at all. Isabelle was the first to find her voice. "Oh Magnus, you don't need our permission to become a Lightwood. I think I speak for us all when I say that we would be overcome with joy if you were one of us. Plus, we are already your family. We would love to be able to show you off."

Alec didn't think that Magnus's smile could get any bigger, and his heart swelled with joy at that. What surprised him the most was the crushing family hug that ensued next.

Magnus and Alec had decided that the rune ceremony would happen at the Institute after their wedding. Alec had explained that it needed to be private, family only, because if anyone found out there was an immortality rune, chaos would ensue as people tried to lay their hands on it.

So now they were all crowded into the dining room at the Institute, watching on as Clary prepared to add her rune to the collection on Alec's skin.

As Clary began drawing the rune directly above his parabatai rune, Alec could see the utmost joy in Magnus's eyes. And he knew that the same feelings were mirrored on his own face. Sure, the thought of immortality scared him, and even as Clary was drawing, he was slightly terrified of what it might bring. But the thought of leaving Magnus terrified him even more. The thought of causing Magnus any pain threw a wrench in his own heart.

Standing here now, waiting for Clary to finish, Alec couldn't stop thinking about why he could have possibly been sent the rune. What was he supposed to do that the angels though he should be immortal for? He silently scolded himself for worrying about that at a time like this. He had never been as happy as the moment he had finally been married to Magnus, and here he was worrying about what was going to happen years down the road.

When Clary was finished, he looked down to see the rune quickly fading from his skin, just as the angel's instructions had said it would. He threw his arms around Clary, unable to speak but wanting to thank her nonetheless.

"Well," Magnus began, the joy clear in his voice. "Now that we have that cleared up, what do you say we head off to our honeymoon?" He laughed when he saw the confusion on Alec's face. "I know, I know," he continued. "We didn't exactly plan this, but I wanted to surprise you with where we are going. I knew that if you were aware of our trip you would bother me for weeks trying to figure out where I was taking you."

Alec had to admit that Magnus had a valid point. "That does make sense. But only because now I'm so curious about where you're taking me that I cannot do anything other than wish you would stop talking so we can leave." Magnus's laugh was full of life, and Alec was simply thrilled to be the cause of it.

Isabelle touched Alec on the shoulder and he turned to see her holding a suitcase. "I was the only one who knew you were having a honeymoon," she explained. "I snuck in before the wedding and packed for you. Everything will be weather appropriate for where you're headed."

He leaned over and gave her a kiss on the forehead while reaching for his suitcase. "Thanks, sis," was all he could find to say. He turned back to Magnus, curiosity filling his eyes. "So, when does our plane leave?"

Magnus snorted, "Plane? Oh Alexander, you seem to forget how I work. We aren't taking a plane."

Alec was confused. How else would they get there? "Wh- Magnus. What are we doing if we aren't flying?"

Magnus's answer was full of love. "Taking a plane would give you far too much time to figure out where we are going. I'm going to portal us there. You'll be guessing until the very last second." He reached over to give Alec one last kiss before the preparations for the portal began.