The Mortal Instruments One Shots

The Demon's Party

~Okay first this is a challenge I'm doing... Cause fun. Lady_Artemis_ here is my one shot! (And I used all lines!!!!!! The shot is mostly based on number 4, but every line is in there!!!! Hope you find them 😜) Second, for this one shot I decided Jonathan/Sebastian is born in November and he turns 17 during CoLS, so it's during CoLS... I'm not English or anything, so if there are mistakes in grammar or something, note them to me nicely and I will change it... I'm trying to make no mistakes, though... One last thing, I do NOT ship Clabastian and this isn't a Clabastian one shot, it's just a scene in CoLS. And a little bit of Clace here and there, cause I'm in a good mood...~

The days with Sebastian and Jace in this magical house of runaways made Clary feel useless. They would go out to the angel knows where doing the angel knows what, while she was forced to stay inside. So when Clary came downstairs to get ready for another boring day, she hadn't expected to see the table being set of breakfast. Jace was nowhere to be seen, but Sebastian stood by the stove, wearing a black shirt and dark jeans. When he heard her coming he suddenly turned around. And he smiled at her. He smiled. A real smile. All Clary could do was frown, even though she didn't want to. "Good Morning?" she mumbled, half asking.
"Good Morning to you, little sis." He took the pan and turned the pancake inside it around like a pro. "Coffee's on the counter." By the thought of black coffee clearing her morning head, Clary jumped up.
"I thought, we need to wait for some stuff anyway, so why don't we have a day inside? Just the three of us, playing a game or something." Clary nearly dropped the cup in her hand, spitting her first sip out.
"Wha...?"
Sebastian raised an eyebrow at her actions while he repeated: "Stay inside and play a game."
"Like what kind of game? Killing the neighbor's cat?" She regretted it the moment it left her mouth. How was he going to trust her if she talked like that? He turned back to the stove and refused to look at her again.
"Well, if that's what you want... I was thinking about Monopoly, but everybody has the right to choose their own thing..."
"Monopoly?" Clary brought out. Was she hearing this correctly? What happened to the Sebastian of yesterday?
"Yes. You know, the Mundie game? With the money?" She nodded, unsure how to react to this sudden change of character.
"Of course I know."
"Good." He picked up a plate and placed the pancakes on it, then shoved it Clary's way. "Here, eat. I'm going to wake Jace."

About an hour later, Clary figured out Sebastian was an master in Monopoly, even though he claimed to never have played before. In the end he beat team Jace and Clary by buying literally all the streets. Clary, sitting on Jace's lap, leaned against him and he wrapped his arms around her, while Sebastian collected the play money that was spread all around the table. He glared at them, but said nothing. When he was finished cleaning up he looked at Jace and then his eyes met Clary's. There seemed to be something different in them, some break in the eternal darkness. Some glimpses of something not evil, not demonic. "So, what's next?"
Clary shrugged. "What do you mean?" Sebastian looked down, at his hands, they were her mother's, slim and long fingered, not meant for battle, but for art, drawing or maybe painting. She wondered if he ever did anything with art in his life. She knew Jace did, but with Sebastian it was hard to tell.
"I just want to know what normal people do... You know..." Okay, this is clearly not the same guy...
"What have you done to Sebastian?" It slipped out. He looked up, surprised. Then he signaled Jace to go away, who did it without asking anything. Not her Jace...

Sebastian turned his attention to her, and even something in his glare was different, less painful, less hard. Less like you're suppose to look down.
"Once," he started. "There was a spaceship in the distance, far away from every other life source." Clary frowned.
"You're going to tell me a story?" He looked at her like he wanted her to understand him, without him saying anything. But she couldn't.
"Just listen, okay? Anyways, on the ship lived a boy, with his father. Only his father wasn't a nice man and he forbade the little boy to ever meet someone, that why he was on the spaceship. Nobody could get in there." This is about him... This is his idea of an explanation for his behavior. "And all he could do was train all day, because he was cursed with the blood of his enemy flowing through his own veins. So his did as his father asked him, became the person he wanted him to be, but the boy didn't want to. Not inside. And he never noticed, but one day each year, he did. He would understand the harm he had done and the loss he had caused." He paused, like he did not know how to go on. "But he couldn't help himself. One day wasn't enough to make this up. One day wasn't enough to feel what he wanted, to change himself. I'm sorry, Clary. For everything that happened. But this is my day, the one day. I want to spend it peacefully. Please, give me a chance in this one." He sounded nearly desperate. She didn't know what to say. Sebastian didn't beg. But this day he was acting weird, it all started with the game of Monopoly and the breakfast and now the story. Something was up, and it was good. At least, it looked good.
"Why today?" She asked. He looked down again, his hands were formed into fists and he spread them again, like it helped him control himself.
Without looking at her, he mumbled: "It's my birthday." She took a deep breath. She didn't even think about that. His birthday.
"You're turning seventeen?" He nodded.
"If I had a normal life, the life I dream about every birthday, I would celebrate it, but I never did." He never celebrated his birthday? Everyone should, evil or not. Somehow she felt for him, raised so hard and without love. Actually it's no wonder he didn't understand... He grew up all alone... Normally, Clary would hate Sebastian for saying stuff like this. She hated him deep inside. But this person wasn't him, he looked like him and spoke like him, but he wasn't. Just like with Jace.
"We could celebrate," she said. He looked up from his hands and his eyes held a deep buried sadness, but also hope when he looked at her.
"Really?" She nodded.
"Of course, if it's true and you're kind of normal today, I want to see that." He smiled at her again.
"Well, that's settled. Go and get Jace, we're going out and be normal. I'm going to change, get ready okay?" She nodded, happy she didn't have to be home all day and ran upstairs to Jace. He opened the door for her and she dropped on his bed.
"Had a good talk?" he asked her, smiling. She nodded.
"Yes, but we're going out. The three of us, we need to get dressed. Like Mundanes."
Jace pouted. "You want me to dress up like Simon? I wouldn't want to be found dead in those clothes." As answer he got a slap on his arm.
"Hey, Simon dresses perfectly fine, don't be mean to him." Jace just grinned.
"Okay okay... What do I wear?" he asked her.
She turned around to his closet at the moment she heard Sebastian yell: "Cllaaaarryyyy!!! What do Mundies wear?" Spoiled Shadowhunters...
"Be right there!" she yelled back. Then she opened Jace's closet, pulled out a shirt and jeans and threw them at Jace's face.
"Wear this." He huffed, but went with it. Meanwhile Clary already went to Sebastian's room. She knocked before going inside. Sebastian stood before his closet, shirtless, jeans hanging low on his hips. He turned towards her what felt for the thousandth time today and she only caught a glimpse of the ragged scars on his back, reminding her of the secrets her brother held, the bitter stories about his past.
"I don't know what to wear," he said. Again she saw how much Jace's and his body where alike. Both muscular and the skin filled with runes and scars, but still not the same.
"You two are such a prima donnas. I thought only girls were hard with clothes..." He just grinned. She walked to his closet and felt him looking over her shoulder. She took a breath, it's her brother, he's different now, he's not going to do anything, and focused on the piles of clothes. It was a mess, everything was disordered and there were clothes all over his room. For a moment she wished he was as neat as Jace. It would have made things easier.
"I know what you're thinking... I need to clean up, but I don't have time for that." Clary's hands went through the clothing, searching for something with a little color. Something that wouldn't make him look so pale.
"Have any colors?" Sebastian frowned, before turning around and walking towards a pile. He went through it and came up with a dark red shirt. He sniffed and dropped it again, disgust written on his face.
"I'm afraid not."