A/N: I know I know I'm a terrible person. I've got so many unfinished stories and I keep writing new ones. This idea came to me when I woke up to early for work and was trying to go back to sleep. I hope you like it tell me what you think, and if I should keep it going also.
Disclaimer: I don't own mortal instruments or Jordan's. I only own JJ.
The vampire wondered over to the little boy he just stood there looking around the park. The vampire was young turned at just eighteen years old. His skin was pale and it offset his black hair and brown eyes. He finally made his way through the park and tapped the little boy on the shoulder. The little boy turned with such speed that the vampire took a full step back. The little boy looked up at him puzzled by the older boy moving away from him.
The vampire looked down and noticed the little boy's skinned knee it was bleeding slightly. Fighting of the urge to drink his blood he got a good look at the younger boy. He wore black denim shorts that stopped just above the bottom of his knee, just above that bleeding scratch. The vampire shook his head and glanced at the boy's shoes. They were black and white Jordan's made for a child. His gaze traveled up to the boy's shirt a white tank top again made for a child.
The vampire took in the boy's face and this time nearly lost his balance. The little boy's eyes were the color of gold. His head was framed in a mess of golden curls. This little boy was the spitting image of that arrogant blond shadowhunter. The vampire leaned forward and allowed himself a small sniff. The little boy narrowed his eyes and took an easy step back. The vampire realized that the child had shadowhunter blood.
"What's your name?" The vampire asked speaking for the first time.
"JJ" answered the boy, his golden eyes still watching the vampire.
"Where is your parents?" The vampire asked now curious.
The little boy shrugged and turned back around searching the park for something. The vampire shook his head and took JJ's hand and tugged him along. JJ stumbled a step at the sudden movement but easily righted himself and allowed the vampire to pull him along.
"I'll take you to the institute." The vampire said glancing down at JJ
"Kay" was JJ's short reply. He didn't know what an institute was but he figured it had to be more fun than searching the park for his mother.
JJ let the vampire lead him through the streets of New York. JJ soon got tired he never walked this long before. Mostly mama carried him unless it was a short walk. He stopped walking pulling his hand away from the vampire. The vampire glanced down at JJ who held his arms up to be carried.
"Come on it's not that much farther." The vampire said really not wanting to carry the child he didn't even know how to carry a toddler.
"Me up." JJ said in response shaking his head and making his golden curls move.
The vampire sighed and lifted the toddler holding him at arms length the way one might hold a wet dog. The little boy squirmed in the uncomfortable hold as they walked. The vampire smiled finally seeing the institute in front of them. He kicked the gate open and walked to the sanctuary and kicked at the heavy door.
"Coming!" A voice called through the halls.
The door opened to reveal the arrogant blonde himself. The vampire quickly shoved the child into the shadowhunter's arms and took off pausing to look over his shoulder he called back to the two blonde boys.
"Keep a better eye on your fledgelings shadowhunter." The vampire was out the door before The shadowhunter could form his snarky reply.
JACE'S POV
"Me down!" Came the voice squirming in Jace's arms. Startled Jace sat the child down who immediately took of at a toddling run.
"Hey!" Jace called following the boy only to find him stopped at the end of the hall looking up at his sister Isabelle.
Isabelle stood at the end of the hall staring down at the little boy. Her hand flew to her mouth to cover her gasp.
"JACE! He looks like you!" Isabelle called to her brother.
"So what? He has the same hair. We have more important things to do like find his parents!" Jace called back to his sister.
Isabelle reached down and picked the child up and placed him on her hip before walking carefully back down the hallway to her brother. When she reached Jace she angled her body so that Jace could see that little boy's face. Jace's mouth dropped open in the perfect "o" shape. Isabelle nodded her head knowing Jace was looking into his own eyes.
"What the f-" Jace stopped cut off by Isabelle's hand slapping over his mouth.
"Don't you dare finish that sentence Jace Lightwood." Isabelle said. Jace nodded his head in both shock and confusion.
Isabelle moved her hand off of his mouth and turned walking into the kitchen with the little boy. She sat him down on the first chair she came to and took a seat next to him. Jace enter the kitchen and leaned against the counter his mind reeling.
"What's your name?" Isabelle asked watching the child with a weary look.
"JJ." came the short and instant reply. Isabelle glanced at her brother before turning her attention back to the little boy.
"I got ow." Said JJ. Isabelle shot her brother a confused look.
"Where?" Jace asked moving away from the counter and taking slow steps towards his look alike.
JJ pulled up his shorts and held out his leg pointing at his knee.
"Watch him" Jace called back leaving the room.
"I'm Isabelle but you can call me Iz if it's easier"
"Iz" the little boy repeated brushing his hair out of his eyes.
Isabelle gave him a small frown. JJ reminded her a lot of Jace. Jace came back into the kitchen with a first aid kit. He kneeled on the floor and put JJ's foot on his knee and quickly put the disinfectant and band-aide on the scrape. JJ frowned at the brown thing wondering where the cars were. Mama always used ones with cars.
Jace picked JJ up holding him the way he saw Isabelle do earlier and walked down the hall to his room. Isabelle followed quickly behind them her heels clapping on the floors. Jace opened his door and set JJ down on the floor.
"Stay here." He ordered JJ before shutting the door leaving a small crack so they could hear JJ.
"Do you think he's yours?" Isabelle asked Jace. He shook his head.
"How could he be? I haven't been with anyone since Clary and that was like four years ago." Jace answered tensing at his own use of her name.
"How old are you JJ?" Isabelle called in the direction of Jace's room.
"I fwee!" Came the yelled reply.
"See he's three." Jace said pulling his sister farther down the hallway.
"Boy's" She said laughing at her brother.
"What?" Jace Asked confused.
"It takes nine months to have a baby Jace" She waited while he did the math.
"That's almost a year" Jace said soft as a whisper. Isabelle raised an eyebrow at Jace still waiting.
"you're saying it's possible?" Jace asked his mind working in overdrive.
"He's the spitting image of you Jace I'm saying it's not just possible it's likely!" Isabelle replied Jace took a deep breath.
"Oh and I'd watch him in your room I hear little kids make huge messes." Isabelle said with a smile as Jace ran back towards his room.
He threw open the door and glanced around the room nothing was out of place. JJ walked around the room putting anything he touched back where he found it.
"Izzy you liar!" He yelled to his sister.
Isabelle walked over to stand next to Jace and watched JJ in disbelief.
"And you thought he wasn't yours." Isabelle said with a laugh gesturing to JJ as he picked up Jace's watch looked at it then placed it back on the little table where he found it.
"I wan foo" said JJ tugging on Jace's jeans.
"What?" Isabelle asked giving Jace a puzzled look.
"He's hungry." Jace clarified as JJ held his arms up and Jace picked him up and placed him on his hip.
"Oh! I can make something!" Isabelle announced clapping.
"Oh no, no way." Jace said entering the kitchen with Isabelle right behind him. Jace placed JJ in the seat JJ frowned up at him.
"Is it a crime to cook for my nephew?" Isabelle asked glaring at Jace.
"One: were not sure he's mine and Two: yes it is when said cooking is likely to poison him" Jace answered.
"He's too short." Isabelle huffed pointing at JJ who was barely able to see over the table.
Jace rubbed his neck then grinned before pulling a large pot from the Cabinet and settling JJ back down on the pot on the chair.
"All better." Jace declared grinning about his quick idea.
"Fix him some cereal, even you can't mess that up" Jace said smirking at his sister.
Isabelle smacked Jace but did as he asked and fixed JJ some fruit loops.
"ALEC!" Jace yelled causing Isabelle and JJ to jump at his sudden yell.
"What's going on?!" Alec asked racing into the kitchen
"Can you call Magnus." Jace said more as a statement than a question.
"Why?" Alec asked
Jace pointed at JJ who looked up at the dark haired boy. Alec stumbled back his mouth dropped open.
"Okay, Okay. I'll call Magnus." Alec decided and left the room in a daze.
JJ finished the cereal and Jace washed up the bowl and put it away. Isabelle helped JJ down off of the pot and took his hand.
"Where are you going?" Jace asked startled to realize that he felt the need to know exactly where JJ would be.
"To get him something to play with." Isabelle called back barely turning to look at Jace.
Jace followed behind them. They were met in the hallway by Alec.
"Magnus is with a client he will be here as soon as possible." Alec told Jace. Jace nodded in response.
A feeling of dread rose in him as they came to Clary's old room.
"Why are we were?" Jace asked eying Isabelle.
"To get crayons or something for him to color with three year olds color I think." Isabelle answered before pushing the door open and leading JJ into the room.
Jace flipped the light on with a sigh and followed them into the room closing his eyes as if that action alone could stop the memories.
FLASHBACK
"do you want children Jace?" Clary asked leaning forward so that her hair covered her face.
"No way I'm a shadowhunter I want to hunt demons not chase some little brat through a park." Jace answered with a laugh placing a kiss on Clary's shoulder.
"Were way to young to even think about a kid I mean come on what would we do with it?" Jace asked slightly nervous when Clary didn't respond to his kiss.
"I need to go Jace" Clary said her voice emotionless as she pulled herself out of his hold and left her room.
"Clary! Wait" Jace called running down the hall
"Good-bye Jace" Clary said softly swiping her eyes as the elevator closed in front of him.
"Mama? Were mama?" JJ's puzzled voice asked as he stared at a picture of Clary pulled Jace into the present.
"I don't know sweetie." Isabelle answered grabbing an old sketchbook and markers before pulling JJ out of the room. Jace followed behind them his head lowered until they came to a sitting room.
JJ sat on the floor and opened the sketchbook and started coloring with his markers.
"Do you think this means Clary is back in New York?" Isabelle asked softly.
"I don't know." Jace answered sadly dropping his face into his hands.
"If she was don't you think she would be with JJ?" Jace asked lifting his head just enough to look at his sister.
"Yes, but if she's not here then how did he get to New York?" Isabelle asked.
"I don't know." Jace said again dropping his face back into his hands. Isabelle's laugh made Jace look up.
JJ was holding up a picture, a really good picture for a three year old. Jace smiled as he realized what Izzy was laughing at. JJ had marker all over himself.
"I'll give him a bath." Isabelle said giving Jace a small smile before picking JJ up and heading down the hall.
Jace picked up the sketchbook and carefully tore out the picture of what looks like a beach and folded it up and put it in his back pocket. He picked up all of the markers and put them on the coffee table. Isabelle came back down the hall and smiled at Jace.
"Where's JJ?" Jace asked
"Taking a bath" She answered with a smile.
"Iz you can't leave a toddler in a bathtub alone." Jace said his voice rising.
"NO!" JJ screamed from the bathroom.
"See!" Jace yelled running to the bathroom with Isabelle right behind him.
They made it to the bathroom and found Magnus and Alec coming in right behind them. Jace looked at JJ and his mouth dropped open in shock. JJ was standing in the far side of the tub holding onto the shower curtain screaming NO at the rubber duck floating in the far side of the tub.
"Oh he is definitely your son." Magnus said taking in the scene with a grin.
"I knew it!" Isabelle said clapping her hands.
"Get it!" JJ screamed at them pointing a small finger at the floating rubber duck.
"Alec get the duck" Jace said shoving Alec towards the tub.
Alec grinned at Jace who was leaning away from the scene and picked up the duck and threw it in the trash. JJ sat back in the tub and Isabelle sat next to the tub and helped him scrub the marker off of himself. The older boys left the bathroom.
"After he goes to sleep. I will see if I can look at his memories and find out where he last saw Clary maybe we can find her from that, if not it will at least give us a start." Magnus said patting Jace on the shoulder and following Alec down the hallway.
A few minutes later Isabelle came out of the bathroom with a clean and yawning JJ. Jace shook his head with a sigh as he took in the sight of his son dressed in sparkling pajamas. Jace held out his arms and took JJ from Isabelle and went down the hall. Jace tucked JJ in to his perfectly made bed and placed a few pillows around the toddler just as a precaution, he didn't know if toddlers still slept in a crib.
Jace leaned down and placed a kiss on JJ's damp curls and left the room leaving the door open a crack. Jace headed down the hallway to find Magnus.