Quite a few of you asked if Jamie has a power. Well, this should answer your question :)

I don't own the MI characters. Just J/C crazy kids :)

Jace POV

"Too slow!" I yelled, leaning to the right when the wooden pole swung at me. My 10 year old daughter Arriane growled and whipped the staff to the right, attempting to knock my legs out from under me. With a laugh I jumped, the wood slicing the air beneath my feet.

Ari let the wooden tip rest on the floor, fist clenching the wood as she panted. "Your cheating Daddy!" She accused, pouting her lips out.

Walking over to her I took the training stick. "Don't worry, it'll be easier once you start getting marks." I said, balancing the pole across the knuckles of my left hand.

"When can I get Marks?" She asked, looking earnest. I kept a easy expression on my face, though my insides were twisting at the thought of my child having the rune lines burned into her skin. It's never pleasant the first time, and if she's too young…

"I'm not a baby anymore Daddy." Ari stated, placing her hands on her hips. God, we need to keep her away from Isabelle.

"Ari, what did we say about mind reading." I repeated for about the, I don't know, thousandth time in the past 8 months.

Green eyes gazed at the floor. "To not to…" She whispered. "But you where being too quiet."

I suppressed the smart remark I could feel bubbling in my mind. "It takes more than 30 seconds to think." I said instead, turning and placing the wooden staff back in it's holder.

"HAHAHA!" A loud childish laugh rang through the training room and I whirled around. Out of nowhere I caught a glimpse of Jamie streaking into the room. His strawberry blonde hair was blowing out around him and he had a manic smile on his face.

"Hey buddy, where are you going?" I asked, thinking he was running toward me. Instead he dove under my legs and behind a weapons holder. I was about to go see what he was doing when my frazzled wife ran into the room, along with Isabelle.

"Did Jamie come in here?" Clary asked, walking up to me. Ari was staring at her mother when Clary stuck her pointer finger in her direction, a signal that meant 'don't read my mind'. Ari pressed her lips together and sat Indian style on the floor, looking disgruntled.

"Yeah, he just came barreling through here. He's hiding behind the weapon holders. What about it?" I informed them, feeling confused.

Izzy walked to the holders and looked behind them. "Darn it! He did it again Clary!" She announced, coming back over.

"He did what again?" I questioned. Clary sighed.

"Our son has a new 'power'" She said, looking sourly at me.

"Well it's not like I gave it to him." I defended. She glared at me and was about to say something when said child appeared.

Half sticking out of the wall.

"What the hell…" I muttered, staring. Jamie laughed and ran toward us. He reached out and tapped Izzy on the hip.

"TAG! Your it!" He yelled. Izzy frowned and grabbed him up, lifting him into her arms. He growled playfully and wiggled around before just falling through Izzy's arms and onto the floor.

"James Maxwell Lightwood! You come here this instant!" Clary called, looking frustrated.

He grinned. "You have to catch me!" He countered, lifting his orange t-shirt up to expose his pale stomach. He pulled the shirt up over his nose, covering this face, but from the way his eyes crinkled up I could tell he was smiling.

Clary frowned. "No Jamie, no more games. Now come here." She said, using her disciplinary tone.

"No." He said, dropping his shirt.

Smirking as an idea came to me, I walked over and picked Jamie up. He thrashed around but before he could do anything else I shifted his shirt up some and blew a raspberry on his belly. He shrieked and laughed, arching away from me. Jamie had the same pet peeve as Clary, because she had the same reaction when I did it to her once.

He looked as if he was about to try and drop out of my arms but I blew another raspberry, causing another round of laughter. While he was distracted I told him, "Enough phasing through things."

Jamie calmed down some and just sat in my arms. "Why?" He asked, "It fun!"

I smirked and leaned my face down toward his tummy again. "Want me to do this again?" I said, raising an eyebrow.

His gold eyes widened and he shook his head, tugging his shirt down. "No!"

I laughed and set him down, keeping my hand on the top of his head.

"When did he start doing this?" I asked. Clary sighed.

"A little while ago. He fell through a chair trying to hide from Izzy. Unfortunately in the course of 20 minutes your son has learned how to phase through things at will." Clary explained, emphasizing the 'your son' part.

"Because he's like you." Ari piped up, before slapping her hand over her mouth.

Clary turned to her. "Arriane! What did we tell you about invading people's minds!"

"To not to.." She said more routinely than sincerely. We're gonna have to come up with better line than 'what did we tell you'. Cause it's not working worth crap.

Izzy sighed dramatically. "By the Angel my head hurts. How are you going to ever handle three with a mind reading daughter and a son who can walk through walls."

"And chairs." Ari added. Jamie pulled away from me and drifted toward the weapons, grabbing the wooden staff. His favorite thing to break the Institute with.

Clary was glaring harshly in my adoptive sister's direction. It took a moment to figure out why when it suddenly clicked.

"Did you say three?" I asked, feeling lightheaded. Clary looked over at me with a small smile, her hand pressed tenderly against her abdomen.

Then everything went dark.

The last thing I heard was Ari saying. "Daddy fainted."

So? A few suprises and fun in this one. How'd I do? And good lord think of the trouble Ari and Jamie could create as teenagers :O