Hey! This is my first Criminal Minds story. I got the idea while watching CM yesterday, and ended up writing till 3am. Please excuse the extreme grammatical errors, I was sleepy. I'm not sure if I like the idea, and I want to hear your opinion. I know Derek's family history is a little off, but I had to change it to make the story work. I tried to keep it as true to the show as possible. If you don't get anything, ask me. My writing style can be kind of odd at times. I wrote a ton of chapters, so there's a lot more to this story. If you guys like it, let me know and I'll post the other parts. The pairings that happen in the future of this story are Morgan/Garcia, Reid/JJ, and Hotch/Prentiss. There's also some Isabella/OC stuff, too. I'll now shut up and let you read.

"Happy Birthday, Bells!" Derek, his mom and his two sisters yelled in unison. Bells smiled softly, her eyes still trained on the 15 tiny flames. After staring for a couple more seconds, she squeezed her eyes shut and blew with all her might, getting all the candles out in one blow. Everyone cheered and his mom began to pluck the candles from the cake, dropping them with a plop onto a tiny dish.

Derek looked down on his newly 15-year-old niece, Isabella, who smiled back up at him. She looked genuinely happy for the first time since her mom, Lucy, passed away six months ago after a four-year long battle with cancer. After Lucy died, Bells had moved in with Derek's mother, for Bell's father (Derek's older brother), had skipped town soon after finding out Lucy was pregnant and hadn't been heard of since. Ashamed of his brother's cowardly actions, Derek had jumped in as the father figure in Isabella's life. He had flown in for almost all of Isabella's recitals, games and birthdays. By the time she could walk, she and Derek were joined at the hip and it had remained constant throughout her life.

Truthfully, she could've passed for Derek's own child. People told her everyday, if not more than that. Everything from her looks to her personality mirrored his, much to his enjoyment. She had his dark skin and big, almost black eyes. She was short and small built, but when she was stuck on her way, you could see her determination burn in her eyes so clearly that it would give you goosebumps. She had a tough, I-can-take-care-of-anything-myself exterior, but deep she was down extremely tender and would do anything to help another person, especially one she cared for. She loved to tease, yet could convince anyone she was innocent and sweet with a bat of her lashes and a toss of her long black hair. She was a flirt, maybe even a bigger flirt than Derek himself. She was his smaller, feistier, female clone. And she loved it. Every since she was a child she had copied him and now that she understood what he did for a living, she became fascinated with it and wanted to learn more. Throughout the years, she had flown out to see the BAU team over the holidays. Immediately the team fell in love with her and she returned the affection to them and the job. So much, in fact, that after just a couple of weeks, she wanted to join the BAU the minute she was old enough, much to Derek's dismay. He didn't like the thought of his sweet, little niece seeing the dark, disturbing images that he faced everyday. He figured it was just a temporary interest and figured it would pass. Overall, Derek was a big part of her life, so when anyone told her she was just like him, which was often, she couldn't help but crack a smile.

However, since the death of her mother, she had lost a bit of her personality and spunk, and Derek felt that it was his responsibility to bring it back. She was like a little sister or a daughter to him and he missed her not acting the real Isabelle. Derek hadn't got to see her much and it bothered him. Her only immediate family was gone and he wasn't even there to help her through the rough aftermath. He always tried to fly in as often as possible, but with his job being so time consuming, his visits had been scarce. He tried to keep an eye on her through emails to both Bells and his mother. The emails from Bells seemed normal, but according to his mother, Bells had been going through a struggle. She was quiet and kept to herself. She hadn't made any friends at her new school and spent all of her free time listening to her iPod, filling up multiple journals with her constant writings and wandering around the house. She kept perfect grades, a little too perfect from a girl her age, and just given up and staying in contact with her old friends. The only person she ever cared to communicate with willingly was Derek's mom, Fran, his sisters, Desiree and Sarah, and above all, Derek himself. His mother said Bells constantly talked about Derek, quoting his emails and retelling his adventures to everyone in the house. He wanted to be able to see her, so he came down for her 15th birthday.

It had been fun two weeks, full of family memories. They had played cards, watched movies and stayed up until dawn together every night laughing until their abs hurt. Derek could already see the sparks in her eyes returning. In fact, by her actual birthday, Isabella was back to her old, post-incident self. Unfortunately, with his departure back to Quantico being tomorrow night, he feared that the sparks would fade without his presence. And it worried him beyond belief. For now, he decided, he was going to focus on the present, as it was much easier.

He grabbed a knife off the counter, then made his way to the cake, cutting it into slices and placing the pieces onto five little plates. He handed one to Isabella.

"Here you go, little lady. It's red velvet, your favorite. It's guaranteed to be delicious as it's made by yours truly, the master chef." He bragged, flashing a cocky smiled in her direction.

She giggled, picking up a fork. "I think I'll be the judge of that, thank you very much. And I'm not a "little" lady anymore, mister. So stop calling me that!" She faux-scolded.

"I'll stop calling you little when you make it over five feet, Sassypants!" He teased.

She jabbed her fork in his direction. "Hey, I'm five foot four, for your info!" She yelled.

"Quit fighting and eat your cake, you guys!" His sister, Desiree, scolded.

"Okay, okay. But Derek, I give you credit, you were right." Bells said with a mouthful of cake.

"About what?" Derek questioned, genuinely wondering what she was talking about.

"This cake is awesome." She stated, smiling.

Not much so far. The next chap give you more info. But, what did you think? Let me know! I don't care if it's positive or negative, as long as it's helpful! Thanks.