Hello there! So basically what this fanfiction is going to be about is Izzy's and Simon's relationship 'sprouting' in between COG and COFA (in like a drabble/one shot form), you never really know how they start dating exclusively so I wanted to do my own version of it!

I want to tell you I sort of got this idea from a picture I saw on devianart. It was Simon and Isabelle and they were sitting on a bed and Simon had his arms around her and they were both holding the controller. It was so cute! So I just had too!

I know Simon is more into World of Warcraft/ Dungeons and Dragons, but I decided to try some other form of videogame because I thought it might be funnier.

….

Isabelle waited wearily at the door of Simon's house. She really had no idea what she was doing, he had invited her to come over and she had nothing better to do. Izzy was trying to get over the fact that there was one missing person in the Institute, there was no pitter-patter early in the morning that once pissed Isabelle off. No more glossy colored manga covered the dark floor of the Institute that made Isabelle trip. Max was gone. It was all her fault.

She blinked tears of her eyes furiously, no damn it! She wouldn't cry, especially not here. Isabelle Lightwood didn't cry, not even after the painful scalds of demon ichor, and the throbbing burns of the black runes on her skin. Isabelle didn't cry, not for anything.

Isabelle raised a fist to knock on the door, just as she extended her arm it swung open revealing Simon. He was certainly was different, the reason could be that he was now a vampire. Before he was the sort of cute but incredibly nerdy mundane boy who sort of had a thing for her and she sort of had a thing for him, she liked teasing mundane. They were so unaware of the world around them, they were so carefree. But now Simon seemed just so damn more… sexy. All vampires to her seemed to ooze some sort of sexiness, danger and charm. He no longer needed glasses, showing his large coffee colored eyes and his hair fell over his face, hiding the Mark of Cain. Courtesy of Clary.

Simon stood and the door and grinned "You checking me out?" he joked.

Isabelle smiled and stepped into the house. It was different being in a mundane one. All her life she had lived at the Institute, Shadowhunters would come and go as they pleased. She realised with a jolt that Simon was barefoot. In his house. Oh, that's what mundanes do Isabelle thought. She bent down and unzipped her brown boots that went up her calf. She decided to go for a relaxed look for that day, tight pair of jeans, a red V-neck t-shirt and a faux leather jacket. All Simon said was that they would be staying at his house, which slightly excited her.

Once she got them off Simon lead her around the house "The living room… kitchen… basement… and my room."

Isabelle came to a halt. She had been in so many bedrooms before, but never Simon's. He was sort of a mystery. She didn't know what to expect when she walked in.

She expected it to be more… dirty. It wasn't like Jace's room, which was unnaturally clean. Simon's room had a cluttered small desk at the corner of his room, with an old computer balanced on it. Isabelle could see the dark carpet of his room, there was nothing gross hanging around like dirty socks or empty pizza boxes but there was the occasional sweater and paperback manga hanging around.

"Sorry for the mess." Simon muttered rubbing his hand on the back of his neck.

Isabelle smiled "I was expecting it to be worse."

"What?! You think I'm a slob? You think I leave my dishes piled up in my room? That I have a little collection of dead ants in the corner of the room?" Simon dramatically said.

"So what are we doing today. You know, in your room?" she asked.

"Well…" Simon shoved his hands into his pockets. "I thought I'd teach you how to play video games. Since you're a Shadowhunter I have a feeling you'll do awesome at this."

Isabelle had heard of videogames, she didn't live in a box nobody could ever contain her, but she never attempted to actually play them. She watched slightly nervous as Simon strolled to the small dark couch that took up half of his room. He looked up at her with his big brown eyes. "Uh… are you coming?"

She swallowed hard and walked over to the couch confidently. The couch squeaked loudly as she sat on it and pulled her long legs under her. Izzy looked over at Simon "Okay. Let's do this."

.

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"Izzy, you use 'X' to shoot, not 'A', your jumping right now. I don't think in battle you jump around like some sort of ballerina princess."

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"No! Isabelle! You don't shoot me! I'm on your team!"

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"Ugh! By the Angel!" Isabelle threw the Xbox controller on the ground "I give up!"

Simon tried to keep himself from laughing and ruin everything. "You were doing okay…"

Isabelle gave him the shut-up-before-I-slice-you-with-my-whip face. Simon put his hands up in surrender. "You did better than Clary. And by that I mean it took you a longer time to throw the remote across my room." Simon snickered.

"Why don't they just use swords? Or whips!" Isabelle demanded, and shook her hair out of her face. "Guns are okay weapons. But they're too loud, and too hard to conceal. I mean seraph blades are hard to hide, but every mundane knows what a gun looks-,"

"Izzy," Simon broke her off from her rant. He was sort of frightened he'd get hit by her, but when the fist didn't come he continued "It's just a game! It's Call of Duty not some sort of Shadowhunter game. I'm sure you could try to contact people to make a more realistic game in your mind. That would be a pretty awesome game…" He broke off and his eyes widened "You mean to tell me you've used a gun?!" He asked, completely changing the subject.

Isabelle nodded, unsure where this was going.

Simon gave a low whistle "I'm impressed. Plus that's sort of hot."

Izzy didn't know what to say about that compliment so she just sort of sat there with her legs in a new position: crossed over, her knees hit Simon's thigh. She stubbornly set her jaw "Can we try one last time?"

"Okay." Simon stood up and retrieved the remote "I'll show you how to do it in detail this time." He gingerly sat down next to her and offered her the remote. When she took it he tentatively wrapped his arm around her and pulled her close to him so she practically sat on his lap. Simon could hear her heart flutter at his closeness. He put each one of his hands over her scarred but beautiful ones and guided her hands to click the 'Start' button.

Izzy looked fiercely at the television screen like she was actually preparing to battle, Simon half expected her to pull out her stele and mark her skin, she didn't. Before the games started she turned her head slightly up at Si and took in his position and his hands "You sly dog." She winked and turned back to the screen and squinted. The games started and Simon's thumbs guided her where to go.

…..

I hope they sound like themselves! And I hope you like it! Also to be honest, I don't really play Call of Duty so I probably am wrong about some of the things haha!