Morning came and Simon carefully opened his eyes. Ugh, worst headache ever, he thought to himself. He turned his head to the side and almost had a heart attack.

"Oh my god Izzy you scared me"He said, looking into her sleepy eyes.

"Well I am about to faint at your morning breath so I think we're even" She replied, earning a shameful look from Simon. He got up, walked to the bathroom and grabbed a toothbrush. It was still in its package; Magnus sure seemed to be prepared for guests.

"My mouth tastes like socks!" Simon exclaimed from the bathroom, before squeezing some toothpaste onto the brush and starting to brush his teeth. Isabelle got up and joined him, picking the pink toothbrush from the gift basket beside the bathroom sink. She leaned over Simon to get the toothpaste, her body shivering with the contact. It's because I'm wearing this tiny nightgown, she reasoned.

With their teeth brushed Simon and Isabelle walked over to the bed, both flopping down on their own sides, Simon trying not to look up Izzy's nightie. Simon closed his eyes and tried to remember the previous night. It took some time, probing through the memories filled with smoke and lights. Finally he reached the last point that he remembered.

"Oh my god Izzy? Did we? How? What?" Simon blurted out, frantically sitting up on the bed. He was starting to panic just a little bit. If he and Izzy had done something and he had forgotten it he would never be able to forgive himself.

"Oh Simon, as much as I wish we had, we didn't do anything too shocking" Isabelle laughed, remembering the previous night and her desperate attempts to seduce Simon. What got into me last night? She thought. She wasn't usually this forward with guys. She had only just met Simon, and tried to sleep with him on their second date.

"Oh good" Simon sighed. "I mean, not good in a way that we didn't do anything but like good in the way that I want to remember if we do do something or like" He babbled on, fearing that Isabelle had gotten the wrong idea.

"Hey, we're cool okay" Izzy replied, lying back down on the bed. Simon followed her example, laying his hands to his sides and closing his eyes. Moments passed and Simon was pretty sure Izzy was asleep. Then he felt a hand brush his arm and realized she was still awake. He let her lace her fingers with his and kept his eyes closed. Isabelle soon broke the silence.

"Your arms are really skinny" She remarked, drawing circles around his forearm with her finger.

"Hey! If I wanted to be made fun of I'd go back to grade 4 gym class." Simon exclaimed.

"No. I mean it's nice. With Alec and Jace around it's nice to hang out with a guy who's not all muscles and protein shakes" Isabelle replied, noticing how Simon instantly relaxed.

"So, we're hanging out. On a bed, hung over." Simon said, as nonchalantly as possible.

"Yeah"

"Okay cool"

Simon was getting way too excited and sighed from relief when Clary opened the door and burst in.

Breakfast had been interesting, cups of coffee and sandwiches being produced from thin air, and after, Clary insisted her and Simon go back home.

"I called my mom yesterday and told her that we were staying at Eric's house, but she's bound to call him soon, and she'll call your mother too Simon." Clary reasoned. And so the two of them started on their journey back home. Isabelle promised to call Simon, and with that they were going. Not before Jace practically licked Clary's face off though.

The journey back was quiet, though Simon could feel the tension in the air. Clary hadn't asked him about what had happened with Isabelle, but clearly wanted to. Finally she broke down and asked.

"We were making out and apparently I passed out, so we didn't do anything" Simon replied, as the hopeful smile was wiped from Clary's face.

"As for what you and Jace did, I don't even want to know." He added, shutting Clary up for the rest of the journey.

It was only a few hours later when Simon heard the doorbell ring. He waited for someone to go open it, but it kept ringing. He got up, ran down the stairs and opened the door.

"What are you doing here?" Simon asked, heart almost leaping out of his chest. Izzy was standing in front of him at his door, wearing the cutest t-shirt and jeans.

"I was wondering if I could come over?" She asked, her mouth curving into a mischievous smile.

"Yeah..Um…sure" Simon replied, ushering Isabelle in and checking that no one saw her come in.

"So…" Simon started, Isabelle sitting on his bed and looking around. He was really not sure what to do, the only girl who had been in his room was Clary, and they were never romantically involved. Oh god, he thought, I should've taken the Star Wars posters down.

Suddenly Simon was awakened from his nervousness, Isabelle was in front of him and roping her arms around his waist. She pulled him closer so their foreheads touched.

"Hi." Simon whispered, looking deep into her eyes.

"Hi." Isabelle replied with a weak smile as her eyelids fluttered closed. She reached out and closed the space between her and Simon's lips. His breath hitched at the surprise but he reciprocated and wrapped his arms around Izzy's waist in the process. She traced the edge of his lower lip with her tongue, bravely asking for entry that was granted as Simon lifted his hands to run through Izzy's hair. The kiss deepened as Isabelle tugged Simon's hair, earning a small moan from his mouth. They fell back onto his bed, Simon balancing on top of Izzy as she let their tongues explore. Izzy pushed Simons shirt up enough for her to run her hands along his stomach, feeling every inch of his skin as he nibbled along her ear.

Simon separated their lips and breathed heavily.

"Wow." He said, looking into Izzy's eyes and running his thumb along her jaw.

"Yeah." She replied weakly, softly stroking his back.

Isabelle flipped the two of them over with surprising strength and started at kissing along his stomach again. Simon took a moment to thank the universe for this moment and resumed watching Isabelle trace kisses down his abdomen, stopping at the edge of his jeans. She looked up at him innocently and opened the top button. Slowly she pulled the zipper down and was about to kiss the edge of his boxers as a loud voice boomed from downstairs.

"SIMON LEWIS DID YOU EAT MY CHOCOLATE CAKE" his sister Rebecca screamed and stomped up the stairs.

"Oh no, it's my sister, do I look like I just made out with a hot girl for 10 minutes?" Simon asked Izzy, concern visible in his voice as they got up and sat on the edge of the bed.

"Well, if we wipe the lipstick off your face then you might seem a little more innocent" she said and smoothed down his shirt. She patted her own hair down and made sure Simon's face wasn't covered in lipstick stains. Suddenly the door to Simon's room burst open.

"SIMON HOW DARE YOU EAT THAT CAKE oh hello!" Rebecca started and stopped to look at Isabelle. She looked Izzy over, and then looked to Simon, then back to Izzy.

"Rebecca, this is Isabelle, my uh…"

"His girlfriend. Hi Rebecca, I'm Isabelle" Izzy finished and smiled. Then she reached her hand out to shake Simon's sisters hand.

"Well, never mind then, I'll leave you two alone since it seems like Simon finally found a girl that stands to be around him longer than 5 minutes" Rebecca said and backed out, closing the door behind her.

"Well, she seemed nice enough" Izzy said, trying to shake Simon out of his daze. He was still wondering how Isabelle had come to the conclusion that she was his girlfriend.

"What? Yeah she's cool," He said, reddening from the thought that his sister knew what they were about to do. He was about to ask Izzy if they could maybe do this another time when she beat him to it.

"It feels kind of awkward to continue, now that your sister is fully aware that we are up here making out like teenagers" Isabelle said, straightening the collar of the hipster shirt Simon was still wearing from the party.

"I totally agree" Simon replied clearly relieved, his body relaxing.

After wiping all of the lipstick of Simon's face they went downstairs and looked for food. The couple ended up ordering pizza and watching Star Wars with Simon's sister. Though her presence forced them to be less physical than they wanted to, Simon still felt dizzyingly happy as he closed the door after Isabelle left. Giddily he climbed up the stairs to his room and started to call Clary. I wonder if she and Jace met up today too? He thought and dialled her number.