Obsession

Chapter 1

"So did you two have a good time?" Mrs Hudson asked excitedly as soon as Sherlock and John entered the flat, causing them to roll their eyes.

Mrs Hudson had been ecstatic when they told her they were actually dating, though she had been confused at first as she thought that they had been dating, and constantly questioned them about their relationship. John had found this very irritating at first, but found he actually liked her interrogations it showed Mrs Hudson truly cared about them and wanted them to be happy.

"Yes, we had a wonderful time", Sherlock said irritably and stalked up the stairs. John fondly shook his head. Sherlock pretended to hate Mrs Hudson's constant questioning, but John knew he liked it just as much as he did and was genuinely touched by her happiness for them, as her opinion meant a lot to him. Though Sherlock would never tell her that.

"Don't mind him. We had a great time, the food was-"

"What are you doing here?" John heard Sherlock shout furiously, John shared an anxious look with Mrs Hudson and ran upstairs.

He was pretty sure that Mycroft was at the apartment, judging by Sherlock's reaction. Though his and Sherlock's relationship wasn't a secret, they didn't want to broadcast it as Sherlock was afraid that his enemies would try to use John against him and he didn't want John to be hurt. Mycroft of course knew about their relationship, John thought he probably knew of their mutual attraction before Sherlock even asked him out. Mycroft wasn't happy about their relationship, he said he was worried it would cloud Sherlock's judgment on cases.

But John knew that Mycroft was very protective of Sherlock, as much as Sherlock was protective of John, and didn't like the idea of anyone dating Sherlock. He kept trying to sabotage their relationship, which instead of bringing the brothers closer just tore them further apart. Sherlock was angrier with Mycroft than usual, and John was worried that they might get into a physical fight. They had had plenty of verbal fights, but they had yet to actually physically hurt each other. John always intervened before it could get to that level.

When John went into the flat he stopped in his tracks, he was right about Mycroft being there. But someone else was there, someone he had hoped he would never have to see again. Jim Moriarty. Sherlock was pointing his gun at Moriarty, and as soon as John stepped into their apartment Sherlock moved so he was standing in front of John.

Moriarty was grinning at them, "Aww, you really think you can protect Johnny boy from me". Moriarty said in a sing song voice.

This caused John and Sherlock to tense, and Sherlock tightened his grip on his gun. "What are you playing at Mycroft? What is he doing here?" Sherlock asked angrily.

Mycroft stood up, "I didn't want to bring him here I had to. And I did bring back up". He said gesturing to the agents around the room.

"You know that's not enough to stop him, from trying something", Sherlock countered.

"Nothing is enough to stop him", Mycroft said.

"Exactly, so why would you bring him here?"

Moriarty laughed, "This is so much better than going to the theatre. Seriously, why do people spend so much money going to a play, when there is free entertainment right here? Why do you think that is John?" Jim said staring at John lustfully which freaked John out though he tried not to let Moriarty see that, though judging by his grin he was unsuccessful.

"Don't you dare talk to him!" Sherlock said angrily.

"Come on, don't be like that. I'm going to have to talk to John, considering we're all going to be working together", Moriarty said.