Answer: First off Clalec shouldn't even have to be said and not just because Alec's gay, but because Clary isn't even a bleep on his radar except for mild annoyance. He doesn't even think about her enough to hate her. With that said, I pick Camille and Magnus. I mean how did that even happen?! 

"Magnus, I need you right now!" Alec called from the bathroom. He sounded like he was in serious pain.

"Did you fall in the shower again?" Magnus asked as he ran to his boyfriend.

"I wasn't taking a shower!" Alec yelled back just as Magnus got to the bathroom but the door was locked.

"You weren't the last time." Magnus teased and tried the door again. "You do realize that I can't come inside if you have the door locked, right?"

"But you can't see me. I look hideous!" Alec cried and Magnus was worried that he might actually be crying.

"That's my line. Now let me in." Magnus pulled out a boppy pin from his hair and picked the lock. "By the angel, you look magnificent!"

"I can't get the eyeliner like you do it." Alec pouted and turned to look at his boyfriend who was wearing a flowered suit with a black shirt that was the perfect inverse to what he was wearing. (see pic. Thanks for the idea lovely)

"Come here, darling." Magnus grabbed his face with one hand and the eyeliner with the other. "Perfect!"

"You think so?" Alec asked with a smile.

"I know it. Now let's get this video over with so I can get you out of your incredibly binding clothes." Magnus kissed Alec on the lips.

"Or, you know, we could do that now and not do the video." Alec wiggled his eyebrows and leaned into whisper into Magnus's ear. "I'll even let you put that tie to use."

"I'm not wearing a tie." Magnus felt a shiver run down his spine at Alec nibbled on his ear.

"I have one on the bed." Alec kissed his throat.

"Ah," Magnus shoved him away. "No! We're doing this damn video and you're going to enjoy it!"

"Fine." Alec muttered and followed Magnus into the study. 

"Hello lovely lovelies!" Magnus sang out as Alec took his seat in the chair next to him. 

"Hi people." Alec pouted then laughed. "So, what do you think of the matching outfits? Magnus was so excited!" Then Alec mouths "Kill me now."

"You think I don't see that mister!" Magnus swatted him. "Now the first question!"

"Here we go.  Incase you're lucky enough to not know what's going on Magnus and I are answering questions about our relationship and other sh-stuff you want to know about."

"Yes! Now, @Summer_OnTheInternet asks How long have you been together?."  Magnus glanced at Alec. "In my head?"

Alec smiled. "They clearly mean for real.

Magnus gave the camera a dreamy look. "Dreams are real." Then he pouted at Alec.

"Cute, but no. Two years and I already regret this descsion." Alec grumbled.

"The decision to be with me or the video?"

"Both?"

"We know that's a lie." Magnus leaned over and kissed him. "Next."

"Fine. @htrub123 What do you like most about one another?"

They looked at each other and spoke as one. "Nothing. Next!" They both started to laugh.

"Honestly," Alec takes Magnus's hand as a blush appears across his cheeks, "that this beautiful man lets me be me. I mean for our anniversary he had planned a whole day out full of things to do but when I told him that I didn't feel like going out he made a fort out of pillows and sheets and made me nachos."

"That was a fun day." Magnus smiled. "I love how low maintenance you are. Seriously, I have to do more to keep my cactus alive."

"Your cactus died 5 months ago." Alec pointed out.

"Exactly." Magnus smiled.

"You terrify me." Alec gave the camera a scared look.

"Next!" Magnus grabbed another paper. "@severusouatpll Who would be the one to attack-"

"You!" Alec burst out cutting off Magnus.

"I wasn't finished." Magnus whined.

"Yeah, but you're always atttacking people, things, ideas. You're just so dramatic!"

"Let me finish please." Magnus cocked an eyebrow at him.

"Fine, but you know I'm right." Alec crossed his arms and had a proud smile on his face.

"Screw it." Magnus kisses Alec's smirk away. "I attack him with kisses way more if we're talking about before going to sleep, but Alec is always the first to do it in the morning."

"That's because you'd sleep all day if I didn't."

"Hey, I need my beauty sleep!"

"We all know you're beautiful whether you sleep 14 hours or 14 minutes."

"And maybe I just pretend to be asleep because I like to wake up to your lips on mine."

"You sound so gay!" Alec laughed.

"I'm a freewheeling bisexual thank you very much."

"But you're gay for me and that's all that matters."

"How could I resist those pretty blue eyes." Magnus rubbed his nose against Alec's then pulled away. "Next question: Who is the one to start ticklin-"

"You, you bastard!" Alec shouted and poked Magnus in the chest with his finger.

"By the angel, let me finish a fucking question for once!" Magnus tried to sound angry but the laughter made it impossible.

"But, you're not even tickilish." Alec looks from Magnus to the camera. "He isn't! It's terrible!" 

Magnus reaches over and tickles Alec. "Shit! Stop!" Alec cries out through peels of laughter.

"Language darling." Magnus teases with a smirk.

"Next question for the love of all things holy! Next Question!"

A/N sorry this one's going to be so long! You all have such great questions! I'll post the next part later today and just prepare yourself for a long one! Like probably double this one!

Love you all and thanks for reading, voting, commenting, and sharing!

Question: Who do you think honestly would propose first between Magnus and Alec?