A/N – this is my first attempt at any Sherlock fanfiction as well as my first attempt at a Molliarty fic. Hopefully you guys don't hate it too much or anything. It was going to be a little oneshot story, but I ended up getting all kinds of ideas for it. So chances are it'll be getting added to more if anyone likes it. Thanks for reading it.

"Did you miss me?" The familiar Irish accent pierced through the darkness of Molly Hooper's apartment and sent a chill through her. She froze and her phone slipped out of her hand and clattered to the floor with a loud crash. She took a deep breath and flipped on the light switch, stepping so her back was flattened against the door in an attempt to distance herself from the man sitting in her armchair.

"What are you doing here?" her voice was shaky even to her own ears. She knew better than to ask how he got into her apartment. Jim Moriarty would consider breaking into her apartment child's play. He had certainly broken into higher security places in the past. His eyes looked her up and down as if sizing her up and he smiled as he rose from the arm chair with an easy grace.

Her hands clenched into two fists at her side as he slowly crossed the room to where she was standing without a word. Her heart was hammering in her chest and she was trying her hardest to keep from showing how frightened she was. She'd been worried this day would come ever since Jim Moriarty broadcast his face on every television in England nearly four months ago now.

"I asked you a question first, don't be rude." He countered, his face didn't betray a single emotion. He slid his hands into his suit's pants pockets and shrugged. "Oh come on Molly." He made a face at her and clicked his tongue like he was scolding a child. "I know it's been a while, but don't tell me you've forgotten about me already."

"It'd be awfully hard to forget about you after that stunt you pulled on the telly a few months back wouldn't it?" She instantly regretted her sarcastic comment as his eyebrows raised in surprise. She had to remember she was talking to Jim Moriarty, the genius criminal, not the Jim who had worked in IT at the hospital and who she had fallen for years ago.

His lips curled into a wide smile and he looked her over as if regarding her all over again. Almost as quickly as the grin had appeared it was gone and it was replaced instead with a pout. "You're mad." It wasn't a question.

She knew better than to fall for the puppy dog eyes he was making and the sad voice, but she felt her heartbeat speed up regardless. "Mad? I haven't seen or talked to you in years, and now you broke into my house. I don't think mad begins to cover what I am with you." she folded her arms over her chest and resigned herself to stand her ground. If he's going to kill me I won't be giving him the pleasure of seeing me beg, she thought morbidly.

"Why'd you do it Jim? You saw me and said "oh she's nice and pathetic, I'll use her to spy on Sherlock." I'm sure it was great fun for you."

His face was emotionless as he seemed to ponder what to say to her question. "I didn't need you to spy on Sherlock." He chided, "Back then you weren't even important to him."

"You know what? I may be thirty three and still single, but that doesn't mean I'm just some pathetic girl you can toy with for your own sick amusement."

"Ooh" his lips tightened into a small 'o' of surprise before he smiled again. There was something about his smile that was unsettling. The phrase 'wolf in sheep's clothing' popped into her head. "You've changed since the last time we talked. You have some fire in you now! I like it!" his dark eyes fixed on hers, burning with intensity.

Molly knew it was stupid but he still had the power to turn her legs into jelly when he looked at her like that. "Look, if you're going to kill me then do it. I'm not going to beg you to let me go." He looked startled and his eyebrows furrowed in what looked like shock. Of course, if he was genuinely surprised he managed to compose himself almost immediately and laughed instead.

"Kill you? Darling, I don't like to get my hands dirty. And I surely wouldn't be doing any dirty work like that in this suit." He motioned to his suit and shook his head, "If I had wanted to kill you I would have placed one of my men on the building opposite yours and had them do it." He walked to the window and dramatically pushed her curtain aside. "Come here." He motioned for her to come to the window and she begrudgingly obeyed. As she knelt to try to grab her phone from the ground Jim's voice thundered loudly, scaring her back up and away from it again.

"LEAVE IT!" his voice was cold as ice and his face was a mask of veiled fury. "I'm not going to let you text your buddy Sherlock, am I?" An instant later he was the picture of cool perfection again. She assumed that was his idea of an apology. "Come." He motioned for Molly to come even closer. "You see, if I wanted you dead I could have one of my many snipers right there on that roof." He pointed to the apartment building across from hers and a cold chill swept through her body as he nonchalantly explained how he would have had her killed. "You would have been dead before you even knew what was happening."

Her heart was racing in her chest, equal parts terrified and just plain nervous to be so close to him again. I'm sick, she thought in her panic, why was it that even when I'm in this situation I find myself attracted to men like him? "I've had my eye on you Molly Hooper." He seemed to linger on her name as if he was savoring it. "I must say I've been rather disappointed in you."

"You were disappointed in me?" she shot back with an incredulous look.

"Helping Sherlock foil my excellently laid out plans like his loyal lapdog. Getting engaged to that doofus who was basically a Sherlock knockoff. That hurt." He placed a hand over his heart for emphasis.

"Tom was not a... a Sherlock knockoff." Molly defended angrily, "He looked nothing like Sherlock!"

"I was hoping you'd at least pretend to fall in love with someone who looked more like me. We know I'm the attractive one after all." He taunted with a smirk.

"It's not enough for you to hurt me the one time by lying to me and using me is it? You're sick. You know, I liked you a lot. I'm sure you don't feel emotions like rejection or pain, but I'm not a psychopath so I do. And it hurts to be used like a sick joke."

"You're not listening" he appeared calm at first, "You're not listening!" fire seemed to flare across his face and he pinched the bridge of his nose in frustration. "You're smarter than that Molly. I already told you I didn't need you to get to Sherlock. I thought about it, but then I saw how utterly unimportant you were to him." His words cut into her, hitting every insecurity she constantly felt.

"Sherlock is blind to you. He was blind to the ways you looked at him, blind to how smart you are, and blind to how cute you were as well!" he slammed his hand against the wall, making Molly jump. "Sherlock only focuses on the negatives with you. He never even noticed how adorable your nose was." Her head snapped up at the mention of her nose and she was immediately brought back to when she first talked to him, when he had told her she had a cute nose before asking her to meet him for coffee. She was positive he was bringing that up to manipulate her, but it still felt nice to be reminded of how he had been.

"I didn't have to talk to you at all, I just decided I wanted to. I'm not one to deny myself what I want."

"Then why use me and play gay just to toy with Sherlock?"

"That was just too good to resist. I can't help myself when it comes to having a little fun at Sherlock's expense. It's just too easy sometimes."

Molly shook her head and sighed, "Jim, why are you here?" She repeated the question she had first asked him, hoping she'd actually get an answer this time. "He still doesn't see your importance you know? Not fully, you're just a pawn he saves until he decides he needs your help. I bet he didn't even think to check on you when I broadcast my little special." He waited for a response and clicked his tongue in disappointment as he clearly read her easily. "Just like I thought. You know, for a genius Sherlock really is a big dummy sometimes isn't he?"

"Why would he have checked on me? I'm not important to you. You talk about pawns, but that's exactly what I was to you."

"Unimportant." He laughed and that same smile was back, "You're anything but unimportant to me. I didn't continually spend time with you because you were unimportant to me." He traced a finger lightly along her jaw and it felt like he left a trail of electricity in his wake. "I kept an eye on you these years I was gone, because I missed you."

Molly felt like she was frozen to the floor, the words I missed you thundering through her head like she was losing her mind. She reached up and slapped him across the face, hard, surprising even herself. "Ooh, good!" Jim cheered and sounded excited. "Not the reaction I would have expected!"

"What are you even talking about, saying you missed me? You've never done anything but lie to me. Pretending to be Jim from IT, pretending to be gay for Sherlock and embarrassing me, and then just leaving after I asked if it was true and not talking to me again. You tried to kill my friend, someone I care about a lot. And you expect me to believe I'm so important to you that you missed me?!" He was unbelievable, except that Molly know he wasn't. He was both slightly insane and probably completely psychopathic. Nothing was fully unbelievable with Jim Moriarty.

"Well I didn't expect to like you after we got coffee the first time. I figured if Sherlock thought you were dull I couldn't possibly find you interesting." He was still smirking at her and it was beginning to really get on her nerves. "And you are dull. You lead an ordinary life. Working in the morgue, and then coming home to your cat Toby at night, it's a life of total routine."

"Wow, thanks." She tried not to take offense to his words and to not care what he said, but it stung nonetheless.

"But dull as you were, I liked you. Your innocence radiates off of you like a perfume, the way you care about people. That's something I certainly lack, it's fascinating. I found I genuinely enjoyed being with you. Even when we just got coffee on our breaks at work, or when I would come over here at night and distract you from that show with the singing morons."

Molly's face turned scarlet at the mere mention of the way he would distract her from her television shows and she could tell that pleased him. "I regretted you having to find out who I really was, and that was truly the most shocking part of it all."

"You expect me to believe that?"

"Oh, don't play coy, it's pointless. I can already tell that you do." He snapped, "Genius here, I can see through any lie you try to tell me as easily as if you broadcast them over your head in neon." He tapped his temple for emphasis, "Don't lie to a professional liar. So now we've circled right back to my original question." He spun his finger in a circle and stepped into her. She instinctively took a few steps back again and crossed her arms over her chest. "So did you miss me?"

"I missed the Jim I thought I knew. I don't know the real Jim Moriarty, I only know an act."

"Well I'm no angel like your dear Sherlock, and I'm not dumb as a rock like your ex-fiancé. But I'd be willing to bet I treated you the best." He sing-songed the last sentence.

"You stopped talking to me entirely when I asked if you were gay and we got into an argument. I even tried posting an apology on my blog so you would see it and talk to me."

"And you found the truth out from Sherlock shortly after did you not? I highly doubt you were worried or missed me much longer after that."

"I tried not to."

That caught him off guard again and he studied her more carefully. "But you did anyways. My, my, my. You do have a weak spot for us sociopaths don't you?"

"Maybe it's just my type." His eyes bore into her like he could see straight through her. When they had been together, however short it had been, he had always seemed so sweet and gentle. There was none of that in the Jim she was seeing now. His eyes burned with intensity like fire, but she knew that in less than a second he could be giving her big puppy dog eyes. Or they could be blank and emotionless again. He was fluid and changeable at the drop of a hat. This was the real Jim Moriarty, the one Sherlock and John knew. But she also saw flashes of the Jim she knew, and she had a feeling very few people saw that, even fleetingly.

He looked out the window and Molly took the opportunity to truly look him over. It was impossible to ignore how great he looked in a suit, she had never seen him in anything but jeans and t-shirts. He turned and caught her looking at him and she didn't even bother looking away. Jim crossed the few steps to her and moved a strand of her long brown hair behind her ear. When he tucked his hand back into his suit pocket he found his hand was uncharacteristically shaky. "I almost came here after my little discussion with your friends on the day you and I argued."

"Why?" Molly's voice was shaky and her whole body felt like it was overflowing with nervous energy. Being near Jim was like being near the edge of a cliff, scary but somehow exciting.

"I was going to tell you the truth about who I really was. I tried to lie to myself and say I wanted to come here to brag about who I was, and about how easily I had fooled you. I'm good at lying to myself. But I knew it was just because I wanted to see you one last time. I wanted the chance to explain it myself."

"You should have, maybe I would have resented you less."

"You wouldn't have forgiven me. You were too hung up on precious Sherlock anyways. You expect me to believe that sweet Molly Hooper would be okay knowing the guy she'd been dating was really a criminal mastermind?"

"No, I wouldn't have been okay with it. But it would have been better than being told the guy I had developed real feelings for had been using me and was a criminal mastermind."

"Well, I couldn't come here regardless. I'm not one to form attachments to people Molly. No one has ever gotten close to me, you posed a threat."

"Then why are you here now?" This was the third time she had asked him that question now and she wanted an answer. He could see that, and gave in, finally spelling it out for her. "Because I'm not one to get attached. But I missed you the whole two years I was supposedly dead. I couldn't stop thinking about you, I couldn't stop wondering if you were sad when you found out I had killed myself."

"You didn't kill yourself."

"You didn't know that."

"Yes Jim, I was sad. I felt horrible about being sad too, because you were ruining someone who I cared about's life. I felt guilty for being sad because you've killed innocent people and done horrible things. But I was still sad, because I still cared about you."

"You may care about Sherlock, but he only cares about you when he needs you." Jim's words were harsh, something she was learning he was very good at.

"Stop- just stop!" Molly finally snapped, "Sherlock does care about me, he's my friend."

"He doesn't care about you like I do!" Molly flinched at the anger in his voice, and pulled away from him. She shook her head and found she was at a loss for words. "I'm sorry Molly." He seemed to surprise himself with the apology. "I don't want you to be afraid of me. I won't hurt you. You see, you're my pressure point." When she stared at him blankly he continued. "I didn't see that three years ago and it lead to you helping Sherlock to foil my plan. I had an assassin watching every person I thought would be important to Sherlock Holmes, but not you. I told myself it's because you were still unimportant, but really it was that I couldn't bear to hurt you even then."

"Why? Why do you care about me when you don't care about anyone else?" Molly found herself reverting to being more timid as a different kind of nerves took over her body. She wasn't scared of him any more, not right now. She was scared of herself and what she would do.

"Because I'm not just Jim Moriarty the brilliant consulting criminal to you. I can be someone else too." She was shocked by his openness and knew this was a side of him he never showed to anyone. He was allowing himself to be vulnerable to her. "You mean you can drop your mask when you're with me."

"Molly don't confuse yourself into thinking I'm a good guy at heart. I'm not on the side of the angels like you. I'm good at what I do, and I love what I do." She knew he meant what he was saying. She also knew that was his way of giving her the chance to ask him to leave, but she didn't. Instead she let him close the gap between them, pulling her to him and pushing his lips hungrily against her own. She melted into him, her hands nervously clutching the back of his suit as he deepened the kiss. This was wrong, she was making out with her friend's enemy. And more than that she was making out with someone who she knew was genuinely dangerous, but he didn't scare her.

Jim easily lifted her and laid her on the couch, climbing on top of her. Her mind flashed back to when he had come over to her apartment for the first time almost three years ago and they had ended up in a similar position. But this time it was different. By all technicalities she was kissing the same person, but in reality it was as if she was with an entirely different person. His hands roamed over her body, slowly taking in her curves and exploring her in a way her ex-fiancé tom never had. He pulled away and moved so he was kneeling on the couch, one leg on either side of her, leaving her gasping for breath beneath him. He unbuttoned his suit jacket and folded it, carefully setting it on her coffee table. When he saw her expression he gave her a wicked smile and shrugged. "Westwood." Was his only explanation before he sunk back into her, bringing his lips now to her neck and relishing the way she arched her back into him as he gently bit down.

He trailed his lips down her neck and collarbone leaving a trail on soft kisses in his wake as he made his way to her blouse. He unbuttoned the first button and continued to trail kisses down her torso as he undid the rest of her shirt and threw it to the ground. Molly felt her face heat up with embarrassment as she remembered she was wearing a boring white bra. She hadn't expected to need anything sexier today when she thought she'd just be going to work. She brought her hands up to her face and attempted to hide how mortified she was.

"Crap, I'm sorry." She apologized as Jim peeled her hands away. He pinned her hands easily above her head in a way Molly could only describe as hot. "What's wrong?" he raised an eyebrow as he waited for her to answer. "It's just- ah- I'm wearing a mom bra, it's embarrassing."

"Molly Hooper if you think I'm concerned about what bra you're wearing you have no idea how men think." He scolded her gently and then his face instantly reverted into smoldering bedroom eyes again. "The only thing I'm thinking about is what's underneath it." Her heart raced and her stomach twisted nervously at his words and she instantly felt better again. He kissed her again, keeping her hands pinned above her head as he pushed his hips into hers. He heard her tiny intake of breath as she did it, so innocent and shy and kissed her harder. He needed her, he needed her touch, and he needed to hear her moan again.

He freed her hands in order to use his own, "Now let's get rid of this since it offends you so much." He slowly slid his hands underneath her and undid her bra, tossing it far away from them over the couch. Molly felt completely exposed like she hadn't been in a while, especially since he was still fully dressed in his white button up, tie and suit pants. She grabbed his tie and pulled him down to her roughly. It was clear on Jim's face he enjoyed it and he genuinely grinned as he looked at her. "I'm more offended by how much clothing you're still wearing." She teased, trying hard to channel her inner vixen.

"These clothes cost more than some people's cars love, I'd hope you weren't offended by them."

"Just get them off." She laughed pulling the tie free and purposely tossing it to the ground to see his reaction. He widened his eyes and made a dramatic appalled face. "I'll smack you again." she warned, a giggle escaping as she did.

"Please do." He smirked and unbuttoned his shirt, throwing it to the floor with dramatic gusto. "Come on, let's go to your bed." He stood up and took her hand in his, leading her to her room. He closed the door behind them and instantly kicked his shoes off into the corner of her room. He removed his suit pants and folded them nicely before resting them on her dresser. "Are you always this OCD about your clothing?" Molly couldn't help but roll her eyes. He ignored her and moved to where she was standing, picking her up in his arms and tossing her over his shoulder easily. She hated how she laughed, she knew it wasn't sexy, but he didn't seem to care. He playfully tossed her onto her bed and went to work ripping her pants off. He made a big show of folding her pants and setting them next to his own and frowned when he saw she had climbed underneath her thin bed sheet.

He shook his head at her and pulled the sheet away, his eyes raking over her body and taking her in as he climbed on top of her gracefully. He looked at her in a way she had never been looked at before, he looked at her like she was something to be devoured. Everyone else always looked at her like she was a delicate flower or something, but the way Jim looked at her made her feel like her whole body was on fire. He kissed her, using his hands to wrap her legs around him as he did. His hands made their way to her waist, holding her firmly as he thrust into her, delighting in the moan that escaped her lips as he did.

They moved together easily, her nails scraping down his back and drawing a thin line of blood as he bit her neck again. As they came together Jim collapsed on top of her, both of them breathing hard. "Oh my god." Molly muttered breathlessly. He traced his lips along her jaw and then kissed her softly before he rolled off of her. He reached for a tissue from her nightstand and discarded the used condom into a small pink garbage can she had next to her bed. Once that was taken care of he pulled her into his arms again, craving her touch. She fit into his arms perfectly and he kissed the back of her shoulders, working his way to her neck again. As he did he could feel her body relaxing into her arms, and her breathing grew steadier.

"Tired?"

"Very. It was a long day at work."

"Let's get some sleep then." He rolled off of her bed and found his boxers on the floor, slipping them back on before he made his way to the light switch. "Can you grab my underwear too and maybe a t-shirt from my top drawer?" she asked him from the bed, the sheet pulled up again to cover her. He switched off the lights and handed her clothes to her. He climbed back in bed next to her and could sense that something was bothering her again.

"Jim, what are we going to do? It's not like this - us - can work. What if Sherlock or John found out?"

"The last thing I want to discuss right now is Sherlock Holmes and John Watson." He made a face, hoping to make her laugh, "Everything's fine. I'll take you to a nice lunch tomorrow and we can talk about whatever you want then." He genuinely didn't sound worried at all, so Molly decided to trust him and listen. "Okay" she nodded slowly and laid back down next to him. "We're an odd pair aren't we?" he mused with a smile, "The angel and the devil." He kissed her softly and she smiled as he did. "Goodnight my dear."