A/N: This is not my work, I'm posting this for my friend, Reaper, who doesn't have a account yet; we share a tumblr actually.

Summary: Sherlock and John work a new case together only to find a young detective has taken a liking to John.

Johnlock Envious

It was another glum morning, the cases had slowed to a sluggish halt leaving Sherlock extra irritable. Even his precious violin couldn't calm him that day. All of that stopped when Lestrade walked into the flat.

Shooting up from his place in the armchair Sherlock marched to the door and stopped far too close to the detective.

"Jesus Sherlock," Lestrade cursed stepping back "Look we need your help with a case in the suburbs, it's an odd one."

It was as if someone had lit a fire beneath the man as he shot up and ran into the center of the room to grab his things.

"Brief me on the way there," he muttered, sorting through a particularly large pile of junk, before pulling out his phone.

"So, you'll take it?" the gray haired man tilted his head curiously to the side at the sheer excitement Sherlock was presenting.

"Yes, obviously," he spat angrily in response, "John is on his way, I'll meet the two of you there."

Sherlock set down his phone before grabbing his scarf, not missing the eye roll Lestrade sent his way before the detective left the room.

In only a matter of minutes Sherlock had burst out of the flat and hailed a cab. Brushing slender fingers through dark locks, it was obvious the anticipation was getting to him. Even John had noticed how the lack of activity was affecting the hyperactive man. This was exactly the fix Sherlock had been looking for.

Passing under the yellow caution tape, and flattening the front of his trench coat, Sherlock made his way to the body laying in the middle of the street. John was already talking to some of the local police.

Rushing to his side Sherlock started to evaluate the situation, eyes shooting over the body with practiced precision, not missing a single detail. Unfortunately his sharp focus on the situation caused him to miss the new intern at the agency that had made her way over to John.

While Sherlock scoured the crime scene, the young woman had started lightly flirting with John. Getting far too close for John's liking, she rested a manicured hand on his shoulder and leaned in close enough for him to get a nose full of her perfume.

"Look it was nice to meet you…."

"Katie."

"It was nice to meet you Katie, but I better get going I think my friend needs me." John was stiff as a bored as he tried to scoot away from the woman who was clearly not getting the message.

"But we just met," leaning in closer so almost her whole body pushed up against his, Katie shot him a sharp smile.

Across the street Sherlock poked at a dismembered hand with a pen. Sitting back, he officially decided he had collected all of the information he could, Sherlock made his way back to John. Once his eyes locked onto the sight before him the tall man froze. Clenching his hands into fists, it took almost all of his self control to keep himself from straight out lunging at the woman.

"Sherlock are you okay?" Lestrade watching the tense man from his place next to a local police officer.

"Absolutely fine." Sherlock forced out of clenched teeth, swiftly moving forward through the crowd.

Weaving in and out of the swarm of people, Sherlock seemed to be nothing more than a streak of black as he almost sprinted to John's aid. Once clear of the maze Sherlock made his way over to the two.

"John I need to talk to you for a moment." Sherlock commanded, not even giving so much as a glance to the woman who had attached herself to his arm.

Shooting Sherlock a thankful look, John made to move forward only to be stopped by Katie.

"We're in the middle of a conversation, it would be rather rude of you to interrupt, don't you think?" Sarcasm was dripping off her tongue as she spoke.

Sherlock's eyes seemed to sharpen at the obstacle placed before him. Every muscle in his body tensed at this, but he knew he had to keep his temper under control, "Listen I don't know who the hell you think you are but it you don't wrench your idiotic hands off of John I will make it so you never work in this city again," he hissed under his breath.

John's eyes bulged and his mouth fell slightly agape. The woman next to him seemed to mirror his expression.

Arching a plucked eyebrow, "Excuse…"

"Oh you heard me, you work for Lestrade correct?" Sherlock began moving forward, stopping mere inches from the interns face.

Paling slightly, Katie took a precautionary step back, releasing her grip on John's arm.

"That's what I thought." Sherlock all but spat at her, grabbing John's hand he led them away from the commotion and to a quieter street.

"What the hell was that?" John asked him, smoothing over his ruffled sleeve, before turning to fully face Sherlock, "I knew you were crazy but Jesus, I think you might have made her cry."

"Good." Sherlock said sharply pacing back and forth, still internally fuming, clenching his hands behind his back as he moved.
"Oh my God, are you...jealous?" John snorted at the sudden realization, "The great Sherlock Holmes is jealous!"

"She was rubbing on you John!" he snapped angrily, throwing his hands in the air and wildly gesturing in an attempt to further his point.

"I could have handled it Sherlock!" John yelled back.

"Oh please," he leaned back, looking up to the sky, "You couldn't handle an aggressive kitten if you had too."

"How old are you again?" John crossed his arms.
"You two argue like an old married couple." Lestrade's distinct voice came from behind the two.

Whipping around in tandem, the pair stared wide eyed at the detective.

"How long have you been standing there?" John all but whispered.

"Long enough." Lestrade sighed before turning and making his way back to the crime scene, "We need you two."

"This conversation isn't over." Sherlock muttered before striding ahead to catch up.

"It never is." John laughed to himself, even though no one was around to see, a light pink blush dusted his cheeks, and an unshakable smile tugged at his lips.

By REAPER