Summary: Now that it's time for Derek and Casey to get over each other, it's a perfect time to bring a new brother and sister into school. But will it bring more complications to their already complicated relationship?

Disclaimer: Don't own Life with Derek, or the characters in it. I just own the brother and sister, who haven't been named in the story yet.

A/N: Hey guys, well, this is my first Life with Derek fic, but I hope you guys like it. The summary may change over time, not sure yet. Your reviews and comments are extremely needed, so please, leave those very helpful reviews.

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Derek Venturi took a quick step back, balancing on his foot, ruffling up his hair a bit more. Cocking his head to the side and giving himself a nod, he jumped to the door, opening it, to a Casey, who took a step back in surprise. "Uh," Derek muttered awkwardly, as she did too. "Here," He stepped to the side, letting her in, as he walked away. Casey replied thanks before closing the door.

It had been a weeks of awkward tensions between the two, ever since they yelled in aggravation that they had a slight attraction to each other. Maybe it was more a slight attraction, and more of an, 'I really like you' confession. The only problem? They live in the same house, and their parents were married. It was too much weird for them to handle, and they found it to be a situation they just wanted to stay away from. So bickering made the house pretty quiet, with only Marti's yells of attention to be heard. It was even worse because the whole house was inquiring why Casey and Derek haven't been down each other's throats in annoyance.

Derek's run down the stairs, rumbled the house with vibrations, as he took big leaps into the kitchen, where Edwin held a spoon in his hand, "Edwin." Derek said, messing up Edwin's hair.

Edwin dropped the spoon, fixing his tousled hair a little, "When are you and Casey going to be fighting in the morning again? I really think you guys fighting made this household unique."

Derek stared at Edwin, expressionless, "Very funny."

"There's nothing funny about it. I'm totally serious, the one week me and Lizzie decide to not spy on you guys, something big happens. It's big enough to have you guys be nice to each other," Edwin said, and then stuffed the spoonful of cereal into his mouth, the milk dripping from the creases of his mouth.

"We're not nice to each other," Derek said, his mouth still full. "We're just not fighting."

"That's why I mean you guys are so nice to each other," Edwin said, as Marti skipped into the kitchen.

"Smerek! Edwin!" Marti yelled, and the two boys cringed from the glass shattering scream. But it did fulfill the absence of noise in the house, "I want cereal!"

Derek looked at Edwin, who tried to ignore Derek's stare. Edwin finally gave in, looked up, rolled his eyes, and got a bowl for Marti. Marti smiled in triumph, and grabbed a seat to stand on next to Derek. She smiled at him, and he just stared at her, "Smerek." She grabbed his head, giving him a kiss on his forehead, as he smiled in return.

Derek looked up once Casey entered the room, as Marti and Edwin took glances between Derek and Casey, checking to see who would leave first.

"I gotta get to school," Derek mumbled as George and Nora walked up behind Casey.

Casey sighed, walking the fridge, getting some milk for herself. She turned around to Marti, who kept her gaze fixed on her, "Marti, what's wrong?"

Marti scrunched her nose, "You and Derek are weird."

"Agreed," Edwin said, putting the bowl of cereal, milk, and bits of banana in front of Marti, who licked her lips.

"Derek and I just haven't had…" Casey thought, shrugging. "We haven't had anything to fight about."

"Right," Edwin gave a laugh, and Casey walked out of the room, in a huff, walking right past Lizzie.

"Still no Derek Casey fights?" Lizzie asked, sitting next to Edwin, who stared at her. "What?"

Edwin, surprised by her question shook his head furiously, "Nothing. Did you change your hair?"

Lizzie raised an eyebrow, "No."

"Oh, right," Edwin said, practically putting his face in his bowl, from embarrassment. It was a weird feeling to him. He wasn't quite sure what it was.

"I wonder if they got into a big fight, the one that has them not fighting at all. Or talking at all," Nora questioned, worried about Casey.

"They talk, though," George said, drinking his coffee.

"Well then, I have no clue what is wrong with them," Nora shook her head, giving up. "Let's just hope they're both okay."

- - - - - - - -

Casey turned right into the hallway her locker was located to see a very joyful looking Emily, excited for God knows what reason.

"Casey! There's this new guy in school!" Emily squeaked, with a big smile. 'To have Em this riled up, he must be hot,' Casey thought, opening her locker. But lately, she wasn't interested in new hot guys; she just wanted to get over one guy. She wanted to get over the weird feelings, because they both agreed it was not the way to go. "There he is," Emily whispered, and Casey looked to her left. It was as if time was in slow motion, and he was looking directly at Casey and Emily. With his spiked hair, chiseled jaw, and irresistible smirk, Casey actually felt her knees weaken a little. Maybe this was exactly what she needed.

- - - -

"Hey man," Derek said, taking his headphones off, to lean against the locker next to Sam's.

"Hey, did you hear yet?" Sam asked a smile across his face.

"Hear what?" Derek asked, intrigued.

"There's a new girl in school. I heard she's hot," Sam said, as well as nodded.

Derek smiled, but noticed Casey and Emily staring at the guy striding down the hall, "Who is that guy?"

Sam turned around to take a look, and then looked back at Derek, "Hot girl's brother, who the girls obviously think is hot."

Derek stared at him, glaring slightly, "Right, right."