Full Summary-

Jace and Clary have five kids: Two seventeen year old boys (Russel and Christophe)r. A sixteen year old girl (Violet). Two bratty ten year old twin boys (Chase and Caleb.)

Sebastian/ Jonathon has two kids (twins also) a boy and a girl. The boy lives with Sebastian and the girl (Alex) was adopted by Jace and Clary at a very young age.

Isabelle and Simon were able to have kids a seventeen year old boy (Jake), a sixteen year old girl (Liz), a fourteen year old boy (Fred), and a three year old girl (Jasmine).

Magnus cast a spell so him and Alec can have a kid, they have a sixteen year old shadowhunter/warlock girl (Abby).

So this story is obviously about their kids. So, this is my first fanfiction. So, Yah.

Proglue

Alex's POV

The first thing I heard as I was interrupted from my sleep was TNT AC/DC ,blasting on the speakers! Violet and I both looked up startled. It just took one look between us and we were both up chasing her two bratty brothers.

We ran through hallway after hallway after hallway, until somehow we ended up in the library. Both of us looked around wildly for Chase and Caleb. That was when we heard the library doors slam shut and lock, we both ran towards them.

Beating on the door repeatly and shouting, well I'm not even sure what we were shouting at them considering it was three in the morning. When I finally ran out of energy and from the looks of it Violet did to. We both sank to the ground, exhaustion washing over me hard.

We looked at each other once again, having the same mind and being parbati's in all, thinking the same thing. I reached into my back pocket and handed her my phone. She took it without a second glance, and dialed an all to familiar number. She slid my phone side ways putting it on speaker.

"Hello." ,a very, very sleepy male voice said with a sigh.

"Me and Alex were sleeping and the boy's woke us up, telling us to hurry it was important, and they locked us in the library." Violet said, in a clearly annoyed voice. Sigh.

"Ok, I'll be over in a few minutes." He said groaning. "Why do your parent's and Iz have to be in Idris?" We heard him mumble into the phone.

"Um…Uncle Alec..you're still on the phone." I said.

"Oops…umm…sorry..by." He hung up. We looked at each other and burst out laughing, uncontrollably. Then stopped when we heard a outraged scream. Uh-oh. Probally Liz.

Then was followed by another one, which was probably Abby. Well if the two evil little brats are gonna wake us four up, why not wake the boy's up to? Well their probably awake now ,considering I can here a lot of screaming and braking glass. Violet and I looked at each other and said, "Uhhhh."