A/N: Thanks again for all of the reviews. So here I am with another chapter. I'm going to do a little bit of a Mentalist crossover in this chapter.

Sandy didn't come back home until the small hours of Sunday morning. She came crashing through Cameron's front door with a tall man on her arm. She was giggling rather loudly which was irritating Cameron. Cameron was sitting in the living room in the dark.

"Shh! She'll hear us." Sandy said rather loudly to her latest conquest. She giggled and her accomplice laughed deeply. Cameron reached over and switched on the little lamp. The room lit up which showed Cameron scowling at her sister.

"Get rid of him." She said darkly. Sandy pulled up rather quickly as the smile slid off her face. She turned towards the man and said,

"Well Michael it looks like you're leaving."

"My name is Chris." He replied.

"I don't care. You'd better go." Cameron raised an eyebrow as Sandy showed Chris the door. How many people has she been with tonight? She wondered. Then she shook her head, I don't care. She heard the door shut and watched as Sandy staggered towards Cameron's bedroom.

"I don't think so." Cameron called from the living room. "You're having the couch tonight and you're not going out tomorrow night either. Apparently you've got work on Monday morning." Cameron pushed past her sister and slammed the bedroom door in her face. Cameron was lying on her bed unable to sleep.

This isn't going to end well. In fact it's going to end in tears.

Of course it won't.

Yes it will. Everything turns to crap whenever she's around.

Give her a chance.

Not in this lifetime or the next! Cameron sighed and rolled over onto her side trying to cut out the voices in her head. She battered her pillow and flipped it over to the cold side. She didn't know what time it was but she eventually fell into a fitful sleep.

Later that morning:

Cameron woke up in a foul mood. She threw the covers off herself and stalked towards her bathroom. Once she was done in there she opened her bedroom door and slammed it shut and smiled when she saw Sandy moan and look startled. Ha! She thought wickedly. She walked into the kitchen and started to grind coffee beans…loudly. She didn't even want coffee but she wasn't about to let Sandy to lie on the couch all day. Then she pulled out a pan and slammed it onto her cooker top and turned on the cold water. She heard Sandy muttering to herself.

"What was that?" she shouted. She smiled when Sandy said something but she couldn't quite catch it over roar of the water. As she was making a loud breakfast she didn't hear Sandy get up and go change. She was serving her breakfast when Sandy came back out.

"Where's mine?" Cameron looked up from her plate.

"I didn't do you any."

"You woke me up for nothing?" Sandy demanded. Cameron shook her head her face was a mask of innocence but on the inside she was grinning like a madman.

"Besides I thought you were on a liquid diet?" Cameron asked innocently. Sandy scowled at her but didn't say anything. Payback's a bitch Cameron thought smugly.

"So what time do I have to be up tomorrow?"

"5am."

"What! I don't even know what that looks like!" Sandy complained. Cameron just groaned. She had just finished her breakfast and put her dishes in the sink and then walked past Sandy. When she got near the door she beckoned to Sandy. Her sister just stared at her blankly.

"That means follow me you stupid idiot." Cameron said. Sandy followed Cameron out of the apartment and then down the stairs. Cameron stopped at a door and started to bang on it. Sandy winced at the noise, as she was more than a little hangover. Cameron stood in front of the door with her arms crossed and she tapped her foot as she waited. After a couple of minutes she banged on the door again then she started calling,

"Callen! I know you're in there. Open the door!" then she started banging on the door. Within a couple of minutes of her banging Callen opened the door in a pair of sweat pants and he looked like he had just woken up. Cameron and Sandy couldn't help but look at his chest as he ran a hand through his short hair. Hm. Nice. Cameron thought to herself then she shook her head to clear the image when she remembered she was still angry with him. She raised an eyebrow,

"I'm sorry I didn't mean to wake you." She said sweetly and this time Callen raised an eyebrow,

"Yes you did. What is it?" he asked sleepily.

"You're right I did." She stepped back and pushed Sandy towards him, "She's your problem now. Good luck trying to keep her in tonight and getting her up in the morning." She walked away before either of them could complain, mind you I wouldn't complain if Callen looked like that! She thought to herself again. She went back up to her apartment feeling very happy with herself.

Monday morning:

When Cameron arrived at NCIS in the morning she was in a bit of a hurry. She had inadvertently slept in since she hadn't gotten much sleep over the weekend. When she pulled up on her bike she saw that Callen was already in as was everyone else. There was also a car she didn't recognise. She pulled off her helmet, I don't want to go in there, she suddenly thought to herself. Shaking herself mentally she climbed off her bike and went inside. She was immediately suspicious when she saw four people she didn't recognise. She slowed her hurried walk as she neared the bullpen. Hetty was standing next to the four newcomers.

"Ah Miss Mitchell. You're late." Hetty stated.

"Yeah sorry Hetty. I've had a bit of restless weekend." Cameron answered as she briefly looked into the bullpen. Her sister was standing in the middle of all of her new friends. Probably talking a good game but talking crap. She turned to Hetty again and said,

"So who are these people?" she asked.

"These good people are from the CBI. These are agents Cho, Rigsby and Lisbon and this is Patrick Jane. He works with them as a consultant. They are tracking a serial killer by the name of Red John. This man has murdered a Navy Commander. You are to assist them in the investigation while the rest of the team help catch your sister up on the other case." Hetty walked away before Cameron could say anything. Sighing she walked up to the woman with long brown hair,

"Hi I'm Cameron. You must be agent Lisbon?" the dark haired woman nodded.

"Teresa Lisbon. This is Kimball Cho." Cameron shook the small man's hand and then Lisbon walked in front of a really tall man, "Wayne Rigsby." Cameron shook his hand and then Lisbon stopped in front of a tallish man with curly blonde hair and blue eyes. Lisbon looked him up and down and shook her head slightly, "And this is Patrick Jane our consultant." Cameron shook his hand.

"Call me Patrick. I like you." He stated matter of factly, "Although you clearly have sister issues." Cameron opened her mouth to speak but decided against. Patrick stared at her and she stared right back. He still had a hold of her hand and he was looking at her with such intensity she wanted to back away and run like Hell. After a couple of minutes he stopped staring, dropped her hand and smiled,

"Oh your good. I look forward to working with you. I should explain that when I catch Red John I'm going to kill him. How do you feel about that?" Cameron raised an eyebrow.

"Do you feel like making it a double?" she asked him only half being serious. Patrick briefly glanced at Sandy but didn't say anything. Before he could say anything Hetty called her over,

"Miss Mitchell. I have your weapon for you."

"Finally!" she muttered and left the foursome to stare into the bullpen. She walked over to Hetty's office. On her desk was a standard issue Sig Sauer with the paperwork that she would have to sign. Cameron picked up her gun, loaded it and clicked on the safety and then placed it in the small of her back. She quickly scribbled her signature and went back to the CBI agents.

"So are you going to show me the crime scene?" she asked them with a smile.

A/N: Let me know what you think. I'm going to do Monday morning from Sandy and Callen's point of view in the next chapter and also the Red John crime scene.