Hey, guys! I was watching Big Time Rush earlier, and the adorable relationship between Katie and Kendall inspired me to write this fluffy one shot. I am not abandoning my other fan fiction, "Old Friends", but I am taking a short break from it to pursue different genres of fan fiction for BTR. Please review!

Disclaimer: I do not own anything!

It was beautiful day in the Palm Woods (actually below 90° for once!) and Katie Knight was happily playing her Nintendo DS. Mrs. Knight was at the store, Kendall was still asleep, and the other three boys were thankfully already at the pool. Sure, Katie enjoyed harassing her brother's friends, but they could be really annoying at times…and Carlos always ate all of their food. Carlos was fun to play with and all, but he needed to stop eating so much…. besides, he hogged the swirly slide all of the time! Logan was smart, but a little crazy. She loved Kendall, but she knew he overworked himself sometimes by trying to be the leader of the group. Last but not least, James. Katie was pretty sure that James owned more beauty products than her mother did. If you combined the four of them…they were nuts, but they were a lot fun. She'd rather hang out with those crazy boys (or pull pranks on them) than hustle Palm Woods residents out of their money.

Katie glanced up at the clock and noted that it was far past her brother's usual time to wake up. Knowing that he would freak out if he slept in past rehearsal time, or some important shenanigan with his friends, she paused her game, hopped off of the bar stool, and headed towards her brother's bedroom. Turning the doorknob to Kendall's room Katie was met by the strong smell of Downy fabric softener (she knew he used more than the recommended amount when he washed his bed sheets). She padded over to the big lump of blankets and gently shook what she figured was his shoulder, eliciting a soft groan coming from the comforter.

"Time to wake up, Kendall. You're burnin' daylight, dude!" she said. No response. Katie sighed and shook him a little harder. He brought his head up and out from underneath the blankets, and blinked rapidly at the bright light coming from the window. Katie went to ruffle his hair but she was caught off guard by the warmth of his forehead. She knew from plenty of experience that a warm forehead usually meant a fever. Naturally, her concern for her brother diminished all traces of her previous irritation with his lack of cooperation.

"Are you feeling okay, big brother?" she asked. Katie was trying not to sound too concerned (for the sake of her reputation) but she was failing miserably as she noticed the sheen of sweat covering Kendall's face. He closed his eyes and shook his head. Katie frowned, "Be right back" she said. She went into her bedroom and called her mom, who was luckily still at the grocery store and was available to talk to her daughter . Katie listened very carefully as her Mom told her what she would need to do. As for Mrs. Knight…she was going to have to turn her shopping cart around and grab some more items for her sick son. Katie hung up the phone, grabbed her cell phone (her mom wanted updates on Kendall while she was still at the store) and then grabbed the thermometer from the medicine closet in the hallway. When she got back into Kendall's bedroom…he wasn't in his bed. Confused, Katie walked into the main room only to see the bathroom door slightly ajar. As she approached the door, she heard the familiar sound of the agonizing act…the act of violently expelling one's stomach contents. Wincing in sympathy, she texted her mom.

Kendall's puking. Katie sent the text and waited for her brother to come out of the bathroom.

A pale and shaking Kendall came out about ten minutes later and he looked helplessly at his sister, green eyes bright with fever. Katie did not want to look at him pitifully but she couldn't help it. She always felt really bad when her brother became ill. Because when Kendall got sick…he got REALLY sick. Katie took her brothers hand and gave it a gentle squeeze before leading him back to his bed.

Once Kendall was settled underneath the thick layers of his blankets, Katie popped the thermometer into his mouth and waited patiently for it to beep. She could not help but grimace at the 101.9° that was blinking up at her. With help through text messages from Mrs. Knight, Katie managed to get Kendall to take some Ibuprofen for the fever and she found a bottle of 7-Up to set next to his bed.

After getting Kendall everything Katie thought he would need, Katie got up and closed the room-darkening curtains and then climbed into her brother's bed. She would sit with him until her mom got home… just in case he needed anything. Honestly, she was not expecting Kendall to turn onto his side, slip his arm underneath her, and pull her close against him as if she were a teddy bear. Katie could not help but smile to herself as she snuggled up against her brother, returning the embrace. He kept his arms around her though and she heard him sigh softly, his breathing deepening as he fell asleep. To be squished up against a very warm, sweaty, sick and unconscious Kendall had not been on her list of things to do today, but she stayed with him. Katie knew that if roles had been reversed, Kendall would have stayed with her. She knew that he would have, because he had done it plenty of times before. Kendall had done everything for her - took care of her while she was sick, let her sleep in his bed when she was upset about Dad leaving, and sang to her on those sleepless nights. Proud to have the chance to return the favor, Katie made herself comfortable and stayed with Kendall while he slept.

-Thirty minutes later-

"Katie?" Kendall whispered tiredly.

"Yeah?" she replied, her voice slightly muffled by his shirt.

"Thanks." he said.

"Anytime, big brother." she said, smiling. Sighing, Katie closed her eyes and let herself fall into a light sleep.

Katie started awake when she heard her mom arrive home and she quickly glanced up at the clock. Had she really gone to sleep for twenty minutes? She looked over at Kendall, who was still in a deep sleep… but he looked a tad better than he had earlier. Trying not to jostle the bed too much, Katie gently squiggled out of both Kendall's arms and the ten pound weight of blankets. Hoping he really was asleep, she placed a soft kiss on his forehead before leaving to help with the groceries.

Ten minutes later, the apartment door flew open and the other three boys came running in. Mrs. Knight and Katie both put their fingers to their lips, signaling them to be quiet and the boys looked confusedly at them…well, at least two of them. James' attention had been quickly grabbed by the fresh pie that Mrs. Knight had picked up from the grocery store bakery. Grabbing the entire pie and a fork, James made himself comfortable on the couch to eat his food. Mrs. Knight explained Kendall's situation to the other two and their expressions quickly turned to worry. Katie could almost see Logan's doctor-like brain diagnosing her brother. Carlos looked worried, but was seemingly more interested in the giant package of fruit smackers that was sitting on the counter. Katie smiled as she watched James devour the pie, and Carlos and Logan head towards Kendall's bedroom to check on him. That was when Katie realized that she thought of those three boys like big brothers. Of course, she was never EVER going to admit it, but she loved Logan, Kendall, Carlos, and James very, very much.

End