I do not own life with Derek.

Kay people there are two authors here. So don't get confused if there are diff writing techniques. On with the story.

Casey stared at the mirror and sighed. 'Too much eye shadow. Grrrrr. Why does everything go smoothly until the eye shadow. Someone must hate me.' Casey wiped the color off her lids and redid her makeup. Finally she was done. Going to the long mirror she looked herself up and down and smiled. She wore and short black skirt with a white tank top. Her eyes were split with two diff colors. White on the whole lid then black on the last half. Smiling she put on some strappy heels and curled her hair. When she was done she ran down the stairs and I into her boyfriends car.

Derek groaned and Sam laughed. "Dude it' your own fault. Did you think you could party last night then come to the next party without a hangover?"

"Shut up before I make you." Sam laughed and dragged him into the house the club. Derek was laughing and just having fun. He was about to go get a drink when a girl with black and white walked in. his mouth dropped open. "Derek stop gaping." Sam laughed and put his friends jaw back in place.

Sam knew who she was. She was Casey McDonald. Party girl extraordinaire, she was known by everyone in his hometown. They had even dated a while back, before they realized their relationship was more brother and sisterly. Then when his dad married her mom they really had become siblings. He didn't see her as much as he had wanted to since he lived with mom, but when Casey's dad married Sam's mom (shocking both Casey and Sam) they saw each other more. Casey was scanning the area looking for faces she knew, when she saw Sam. Squealing she yelled his name and ran towards him. "Saaaaaaaammmm!" laughing Sam caught his step-sister in his arms and swung her around. Laughing he set her down. "What's up sis." "Nothing."

"Hey Sam. I need to talk to you." He was then drug off by Derek.

"You know her?"

"Yeah. She's my step sister. Her dad and my mom are married. And her mom and my dad are married." Derek looked at him in shock. "Yeah we looked the same way too. Want me to introduce you guys? She's a party babe though." "Please and thank you."

Sam laughed and they went out back to Casey. " Casey this is Derek. Derek this is my sister Casey." Casey smiled and shook Derek's hand. "Nice to meet you Derek. OHMIGOD. I love this song. Dance with me Sam. "

"I don't dance that way anymore." "GASP. I'm ashamed."

"Dance with her Derek." Casey looked at Derek then grabbed his hand. When they got to the middle, Casey left Derek and went to the DJ. When she got back the DJ\started it over again. Casey started dancing. Derek smiled and followed her. Sam looked at the two grinding and winding and smiled. Derek had his hands on Casey's hips and lower back.

Casey's hands were on his neck as she leaned back and started grinding. Derek smiled and lifted her up. That's the way the rest of the night went.

The next morning Derek went to Sam's house to learn Casey had returned home. Sighing Derek realized it was going to be a boring summer. Days went by slowly until it was a week before school. Then the next thing he knew….it was the first day of school. He had honors classes this year. He decided he wanted to have a reason to go to college besides hockey. He was sitting in homeroom when the principals secretary came in. he rolled his eyes as she started talking to the teacher. Putting his head down he groaned. "Class. We have a new student." 'great more nerds' Derek thought. The teacher introduced the new kid. "Class I'd like to introduce Cassandra McDonald. She has moved here from the a different part of our state. Please introduce yourself dear." "Hello everyone. As you know my name is Cassandra." Derek knew that voice. He looked up and saw Casey. "Casey!." Casey looked around and saw Derek. "Derek! Omg." Derek got up and pulled Casey into a hug. "hey there girl." "hehe. Hi." Hearing the door open they saw Sam. "sorry I'm late teach., but my sister turned my alarm off." "Oh really well 'd like to give your sister a talking to.

"You can when Derek lets go of her." The class looked at her in shock. She smiled and re introduced herself. "Ok my names Cassandra McDonald White (A/N: sry idk his last name. If you know tell me and I'll edit) I'm Sam's stepsister.

A/N: what did you think? Read and review plz.