Jealousy - Sherlock X Reader

       Rain was falling down from the roof of the flat John Watson and Sherlock Holmes shared. John, at the moment, was sipping a cup of tea and smiling at his laptop as he typed away. Sherlock, on the other hand, was bored. He had no cases to solve, and John had taken away the gun after he got three bullets in the wall where the yellow smiley face was painted. He looked around the room, trying to finding something to peak his interest, even if for a second. John let out a soft chuckle and continued typing, nodding at something.
       Sherlock sat up, looking at his face and body expressions. He was smiling, but it wasn't a smile as if something were funny. No, it was more of a smile as if he was conversing with an old pal. But the way his body was relaxed, and that he continued to type instead of taking a break, it was an important person in his life. A girlfriend, possibly. That probably wasn't it, though, because John would be more nervous than what he was. He was weak like that. Sherlock thought as he nibbled on his thumb, an old habit he had stopped when he was two, but he continued whenever he was concentrating. "Stop that." John commanded, not even glancing up from his work.
      The ebony haired man blinked, "Stop what?" John finally looked up from the laptop to give him a look that said, You know what. "Deducing you? I'm bored, and you seem to be doing something of some importance, giggling like a school girl over there."
      John's face flushed and he stammered, "I-I was not! And if you were concentrating so hard, tell me what I was doing!" Sherlock went to reply when his phone went off with the text message noise. He sighed and looked down at it half-heartedly.
       Needed at a crime scene. It's quite like no other. - GL
      Sherlock rolled his eyes, they say that about almost every case. Then another text shot into the phone.
       There's someone here. A freak, like you. - SD
     He stood up quickly, tying his scarf around his throat and tossing on his coat. He slipped his shoes on and jumped over to the door. "Come on, John! We can't stand still! Cases are to be solved!" Quickly exiting the building, Sherlock ran down the street with the promise of an interesting case. John glanced up from his laptop, only to see that Sherlock was gone. Of course, he should be used to this, but it still got quite frustrating. He closed his laptop and put on his own coat, walking out the door and down the steps, where Mrs. Hudson stopped him.
       "Oh hello dear! Did Sherlock find something to do finally?" She asked in a happy tone, and John nodded. The lady leaned in with a soft smile, "So, when's she coming over? And better yet, when are you telling Sherlock?"
       John shrugged, "I don't know. He'll probably be annoying about it anyway I say it. You know, now that I think about it, she did say something about being on a little detour." His phone rang out, and John picked it up, noticing Sherlock's name acrossed the top. It was a bit strange, because Sherlock prefered to text. Must be urgent. He thought, answering the phone with a cautious voice. "Hello?"
       There was a growl at the other end, and a cuss as well. "John, where are you?" Sherlock asked, his voice uneven from his anger.
       Looking at the phone in amazement, John replied, "Sherlock? What's wrong?" A shout was heard from the end of the phone, and from his position, it seemed to John like Sherlock was the one shouting.
       After a second, a second voice entered the phone, this one feminine. "Hey Johnny boy!" John's eyes widened, and a giggled echoed to his ear. "Your pal here, he seems to be quite angry. You might wanna get over here."
       John went to reply, but the line went dead. "Dammit." Mrs. Watson looked to him for an answer, and he gave a small smile. "She's here, and Sherlock had the good fortune to meet her already. And she probably just pissed him off. Now, I must go before he kills her, bye!" He waved as he exited the house, hailing a cab to the most recent crime.

*~* Time Skip of Sherlock getting angry *~*

       Flashing blue lights greeted the former war veteran when he approached the scene. Police tape covered a good area of the yard, and he could barely see black locks bouncing up and down in what could only be anger. Sherlock was shouting, and John heard the same giggle from the phone next to where Sherlock was. Running towards the group, the blond join a group of bystanders watching the duo in amusement. Among these were Greg Lestrade, Sally Donovan, and Philip Anderson. Sherlock continued to shout at the girl in front of him, stomping up and down as she smirked. "-Right. So..... whenever you're done pouting, I have a case to solve." The girl interupted, bending down to inspect the body. Sherlock's eye twitched as she ignored him, and as he went to say something, she held up a hand. "Shut up Donovan."
       Donovan looked confused and stammered, "B-but I didn't say anything."
     The girl nodded continuously, "Yes, but you were thinking. It was annoying." Anderson began snickering until she rolled her eyes and snapped, "Anderson, shut up. Your stupidity is effecting the whole street." He paled and walked away, Donovan in tow. "DON'T GIVE HIM A BLOW JOB BEHIND THE HOUSE, WE'LL HEAR THE GAGS!" She shouted after them, causing the rest of the crowd to start laughing.
       John smiled at her before giving a interrupting cough. "Y/n, you seem to be still as sarcastic and loud as ever." He said, kneeling to her current height. She looked to him and smiled, tackling him in a huge hug.
       "Oh my god! Johnny boy! It's you!" She hugged him tightly, causing a light squeak. Sherlock watched the duo with mild curiosity, until Y/n turned to him. "Hey Sherly! This is my big brother, Johnnycake. Have you met him?" She nuzzled into her brother's chest, cooing like a baby. Just as Sherlock was to answer, Y/n interrupted him. "Of course you have! How silly of me! You're our flatmate!"
        Sherlock looked down at John, "Our? As in, she's living with us?" John nodded and sat up, wrapping an arm around his sister. "No, not happening. I need a flatmate. Not two." Lestrade noticed where this whole conversation was going, and so he coughed and motioned for his team to leave. Soon it was just the three standing there, John holding onto his sister in a caring way.
             He looked up at Sherlock with a frown, "Oh come on! Just this once! She's my sister, Sherlock, my sister! How can you be so uncaring to not let her stay?" Y/n was giving a pleading look, and Sherlock sighed.
                  "Fine." Turning on his heel, he walked off the crime scene.
                Y/n, on the other hand, turned to her brother and smirked, "Well, considering what I did, that was quite simple." John nodded in annoyance before picking her up, much to her protest. "HEY! PUT ME DOWN YOU OAF!" She shouted, laughing as he carried her to the nearest cabby. Tossing her in the back seat, he told the man the address, and prepared himself for Sherlock's silent wrath.

*~* Time Skip brought to you by the Reader's snarky remarks *~*

       Back at the flat, Sherlock was pondering over what happened at the crime scene.
       "Hey Sherlock!" Lestrade had greeted, leading him over to the case. A girl was already kneeling by the body, her (s/c) hands wearing a pair of see-through gloves. She flitted around the body, looking at injuries and the amount of blood that was being drained. Her (h/l) (h/c) hair was bouncing slightly with every movement, when she finally stood up. She turned and looked at them, stunning Sherlock slightly. She had (e/c) eyes that seemed to shine, and her cheeks were a light red from the cold, along with her nose. She was wearing a long (f/c) trench coat that was opened slightly, allowing the duo to see her (2ndf/c) dress and heels.
       Waving to the boys, she skipped over to where they stood. "Hello again, Lestrade. Who's this? Sherlock Holmes?" The chief detective nodded and she turned back to the body, "Never mind that. Sherlock, give me a second opinion on this." The ebony haired male looked at her with awe, he was the one that usually asked John. He must of been staring at her for a while, because the girl turned back to him and raised an eyebrow, "Well? If you won't do it, I'll ask Anderson, but his idiocy would ruin the moment."
       He nodded and walked over to the body, looking at where the knife and multiple other weapons had been inserted. "Well, uh, they were stabbed. With a knife. And then shot, along with being hit by a blunt object."
       She rolled her eyes and nodded, "Yes, that's obvious. Any cop here could point that out to you. What else?" He continued to look, and that's when he noticed it. Stirred up mud, next to the body. Something white seemed to be poking out, and when he went to reach for it, the girl slapped his hand. "No. Don't move it, you idiot. You'll ruin the perfection. She shoved him out of the way, making him fall back into mud with a splash. She quickly yanked it out, not disturbing a single piece of mud around it. She opened the letter and nodded, discarding it into her pocket.
       Sherlock sat up, glaring at the girl with frustration. Who the hell did she think she was? She turned back to him and Lestrade, mainly Lestrade, and walked over. "So, what did the note say?" Sherlock asked, looking up at them from his position on the floor.
       The girl laughed and tapped his nose, making a dip of mud go on it. "Confidential information, Mr. Holmes." She turned back to Lestrade and watched as he muttered into a phone in an angry manner. "Another fight with the Mrs?" She asked, causing him to nod as he hung up.
       He bent down and held out a hand to Sherlock, who pushed it away and stood up. The mud dripped off, although some was obviously going to stick. "Sherlock, this is-"
       "Y/n, Y/n L/n." The (h/c) haired girl held out her hand to shake, and Sherlock took it hesitantly. "Pleasure to meet you, kind and messy sir." He huffed and stomped away, grabbing his phone out of his pocket to call John.
       John answered the call quite quickly, and Sherlock cussed as Y/n was still showing off to the others, practically telling them who the killer was. And it looks like she knows, too. He thought bitterly before turning back to the phone. "John, where are you?" John continued to question him, and as he was going to answer, Y/n snatched the phone out of his hand. "WHAT ARE YOU DOING!" Sherlock shouted at her, trying to grab the phone back. She held him at arms length before talking into the phone. The consulting detective was too angry to hear what she was saying, and before he knew it, she was handing the phone back to him.
       He went to check if John was still there, but the line was dead. He turned to Y/n, and shoved the phone into his pocket before shouting, "WHAT THE HELL DID YOU DO? THESE IDIOTS ARE MY IDIOTS! GET YOUR OWN PEOPLE TO INSULT!-" He continued a rant, with a few smart ass remarks from Y/n every once in a while, which just fueled the hatred more. A crowd gathered around them, and soon, John had joined it. Finally, Y/n ignored him and went back to the case at hand. Oh, but Sherlock wasn't done. He went to say more, but then Y/n held up a hand.
       "Shut up, Donovan." His eye twitched again and he went to strangle her, that was his line. She eventually insulted Anderson and Donovan enough to make them walk away, which was more than Sherlock could do. And he didn't like it.
       Sherlock huffed and crossed his robe sides before turning to the side, glaring at the cushion on the couch. He knew he was superior, so why was this inferior creature being able to mess with his mind and make him so angry? It was out of character for him, because he was usually so much more controlled around the police department. John and Y/n walked into the living room, or John did, because he was still holding his younger sister. Both were laughing and Y/n was poking her brother's nose. "Y/n, you'll have to meet Mrs. Hudson. She's a riot." John said with a smile as he sat her on his chair.
       Y/n nodded, "Why don't we walk down there now. Are you coming, Sherlock?" She asked, looking over to the male in question.
       "No." He snapped sourly, burying his head in a pillow.
       She shrugged, "Suit yourself. Oh, and by the way..." She leaned into his ear, "I know jealousy when I see it. Be careful, Mr. Holmes. It can cost you everything."