Title: Mistaken Identity Parts: 4/4 Ratings: Pg/Pg-13. Violence: Nope, only in Kerry's mind.

Pairings: Kerry/Carter, Kerry/Dave, Kerry/Luka, Kerry/Elizabeth...I think you get the idea. The pairings are mostly in jest, and most of them should be taken lightly.

Summary: Kerry's identical twin sister, Karen, is in town and believes that Kerry should have a more active love life. In an attempt to help her sister, Karen starts a chain of events that lead to a series misunderstands, mix ups, and blunders...

Notes: Everything is pretty tame, a lot of stuff is left off screen, to you imagination, or insinuated. Also this isn't the first fanfic I've written, but it is the first ER fanfic I've ever tried. This is mostly dry humor, so don't freak too badly over the pairings.

Disclaimer: ER and all characters belong to NBC, Crighton, and the studios. I am only borrowing them for entertainment purposes.

John stared at his friend and boss, unable or unwilling to comprehend what she meant. If Karen was the one in the kitchen, then that meant that Kerry wasn't in love with him. But Kerry hadn't exactly pushed him away last night either.

Kerry glanced away, unsure what else there was to say to him. She could feel the boyish eyes on her, but she didn't look at them. Didn't want to see the hurt or the pity.

Gentle hands wrapped around her waist as John spoke into her neck. "It may have been your sister who was in your kitchen, but it was you that woke up in my arms, and it's you that I want."

Kerry let the tension slip from her body. "Are you sure?"

John turned the self-conscious woman to him and tenderly kissed her. "So now what?"

Kerry leaned into his arms, letting her eyes drift closed. "Now we teach my annoying sister a lesson."

John chuckled, softly glad that he wasn't on the receiving end of her anger. "Don't you think you're being a little hard on her? If it wasn't for her we'd never have gotten together."

"And she also has Malucci and half the ER believing that I'm interested in them."

Suddenly John didn't find this so funny. "You're right, let's get her."

Karen drove Kerry's car into the driveway parking next to her motorcycle. She knew her sister would be ticked over her taking the car without telling her, but she would let it go in the end. Not that she wouldn't pay for her behavior, it was just that Kerry never really held a grudge against her.

Walking into the house she froze, the loud drifts of heavy blues filled the darkened house. The only light came from the crackling fireplace.

Kerry was curled up on the sofa with a bottle of vodka, another empty bottle lay on the floor in front of her. Entering the living room, Karen got a good look at her face. It was white and drawn, her eyes puffy from crying. Karen felt her heart sink, she hadn't seen Kerry like this since the accident that cost Kerry her leg. Clenching her fist she vowed to kill whoever did this to her sister. "What's wrong?"

Kerry never took her eyes from the raging fire, numbly holding up the letter in her hand.

Karen took it, her eyes not believing what she read. "Fired?!!...Sexual Harassment... Take away your license...They can't do this."

"Apparently they can."

Karen collapsed next to Kerry. She was supposed to be protect her sister, keep her safe from the world, and instead her pranks were costing her sister everything she had.

"...and that's not all..." Kerry paused, her raw voice painful to listen to. "...John caught Malucci kissing me in the supply room and broke up with me."

Karen took her sister into her arms protectively, the way she used to when they were children in the African orphanage. The way she had on so many occasions over the years. "Kerry, it's all my fault."

Kerry's body began to shake.

"I've been impersonating you...I...I'll go over there right now and clear all this up..." The muffled sobbing in her shoulder brought tears to her eyes. "Gods, Ker, don't cry, please, I'm sorry. I swear I won't ever do this again. Just...don't cry."

Kerry sobbed louder, her entire body convulsing as she sat up.

Karen stared at her laughing sister, not sure what had just happened. "Ker...?" She heard a soft snicker from the kitchen and glared over at the doorway as John entered. "This isn't funny."

Kerry leaned back against the arm of the sofa, sobering. "No it isn't."

Karen winced inwardly, knowing that her pranks could have caused some serious trouble for her sister. "All right, I get the point and I'm sorry, okay?"

"No, it's not okay, and tomorrow you're going to county with me. Where you will explain and apologize for your behavior." The stony expression on Kerry's face left no doubt in Karen's mind that she had a choice in the matter.

"Fine."

Kerry relaxed, then stood up. "In that case, I'll see you in the morning."

Karen eyed John and her sister with sudden suspicion. "Hot date?"

Kerry winked at her. "Not exactly."

Karen laughed as they left together, glad that at least one thing had gone right.

Karen trailed off, scanning the lounge for everybody's reactions. Malucci, Lucy, and a few others seemed to find the whole thing funny. Luka was keeping a neutral face, not really letting her know how he felt, and Elizabeth...

Karen unconsciously took a step away from the surgeon. Kerry cracked a small smile at the deadly look Elizabeth was giving her sister.

The others began to slowly shuffle back out into the ER, leaving only a few of the main victims of her pranks.

Dave walked over grinning at her. "You want to have dinner with me tonight?"

"So you're not mad?"

Dave smirked moving closer to her. "No, but I'm still in pain from being beat up."

Karen pouted softly sliding her hands into his hair, "You poor baby, I suppose I should nurse you back to health, then."

Dave nodded, zeroing in on her lips, pausing as Kerry cleared her throat. "Malucci, if you're not with a patient in the next thirty seconds, I'll have you working night shifts for the next week."

Dave glanced from the Chief to Karen, and back to the Chief. Working the night shift would make it impossible for him to get to know Karen. Spinning around, Dave ran from the lounge in record time.

"Luka, you okay?"

The dark man smiled cheerfully. "Great. I've got a date with Anita from surgery." Luka eyed Karen and Kerry. "I can't believe you two are related."

"Amazing, isn't it?" Kerry said dryly, ignoring the glare her other half threw at her. Luka turned back to the chart review he was doing.

Kerry grinned at John. "Well, that's over."

John leaned over, whispering softly. "She is the only sister you have, isn't she?"

"Yes..."

John nodded, relaxing. He could handle one mischievous sister.

"...biological, that is."

John felt his blood turn cold at the looks Karen and Kerry exchanged. Deciding some things were better left unknown, he held his hands up, leaving the lounge.

"You think he'd survive meeting our adoptive family?"

Kerry chuckled softly. "I doubt it."

Karen bumped into her playfully. "Too bad...'cause something tells me this one's a keeper."

Kerry shook her head and walked out into the familiar bustle of the ER. The day was shaping out just fine, and for once she wouldn't be going home alone.