Disclaimer: Don't Own, Don't Sue.

A/N: This is based on this prompt from fyesemmaandhook: When Hook and Emma get back to Storybrooke, they are secretly having an affair (think Graham/Regina style)…only every time they hook up, someone almost catches them. This first chapter will be deviating slightly from the prompt, but the later chapters will not. A huge thanks to The Flying Poppy for betaing this. This is my first attempt at writing anything smut-ish, so I hope you enjoy it!

The Forest

Killian stood across from Emma with a self-satisfied grin on his face. His hook was looped securely around her wrist, preventing her from fleeing. The Swan girl glared back at him defiantly. They both knew that he wasn't about to let her go, not again. Not after it had taken him so much effort to get back to her in the first place...

xxx

After ten hours of captivity and a long climb back down the beanstalk, the last thing Hook wanted to find was Cora waiting for him. He tried to use his skills as a liar to deceive her, but it was useless. She saw straight through his attempts to charm and trick her. They both knew that he'd chosen the Swan girl. Cora left him - his heart thankfully still in his chest - with the promise that his thirst for revenge would go unquenched.

In that moment, he decided that he would once again choose Emma. Despite the fact that she'd left him chained in a giant's lair, Emma was still far safer company than a woman who habitually ripped out the hearts of anyone who crossed her in the slightest.

All Killian had to do was find a way to get back into her good graces. To make her trust him. Or, at the very least, agree to not leave him behind again. It seemed to be an entirely hopeless situation, but Killian Jones loved a good challenge, and the Swan girl was nothing if not a challenge.

When he discovered that Cora's gaggle of animated corpses had successfully snagged a princess, Killian saw the perfect opportunity to gain the favour of the group of lovely ladies. It took Hook longer than he had hoped to infiltrate Cora's prison, and wake the sleeping princess. It took even longer to convince her that he was telling the truth when he told her of his plans, but she eventually accepted his plan, and escaped into the forest. He followed her from a safe distance as she led him back to the rest of her group like a good little girl.

From his hiding place, he'd had the perfect view of Emma's shocked face as the sleepy one told her who'd saved her, and why. His grin only widened when he heard the lovelies arguing about whether they should let him rejoin them or not. It wasn't the first time that Killian had women fighting over him, and it certainly wouldn't be the last.

He finally managed to secure his return to their merry band when he leapt to their aid against another zombie attack. As he fought the oncoming horde, he had found himself back to back with Swan, as three attackers slowly circled them. In spite of the danger they faced, Killian couldn't resist reminding Emma what a fabulous team they made.

"When are you going to admit, darling, that you just couldn't cope without me?" He gave her a flirtatious wink, before he lunged forward and decapitated the closest corpse.

When the fighting was over, Emma quickly encouraged everyone to start moving again. She'd only taken a few steps before she looked back over her shoulder at him.

"Well? Are you coming or not?" She demanded with annoyance. She continued walking before he'd had a chance to reply.

"Don't worry, love. I'm not letting you out of my sight again," He promised, as he smiled broadly at her retreating form. He swept his eyes up and down her back, enjoying the view as she strode on ahead of him, before he jogged to catch up. As they made their way through the forest, Killian took great care to ignore her mother's warning glares and huffing noises.

When they'd found a place to make camp for the night, Emma quickly volunteered to take first watch. As he lay on the ground and feigned sleep, Killian waited patiently for the opportune moment to get her alone. When he was sure that the others would neither awaken nor would disturb them, he silently crept towards her.

As she surveyed the forest, Emma took the time to consider her options when it came to certain maybe-not-entirely-untrustworthy pirate. She was so wrapped up in her own thoughts that she didn't realize the scoundrel was sneaking up on her, until she caught a glimpse of something moving out of the corner of her eye. She spun around swiftly, sword raised and heart pounding, only to find herself face to face with a jovial pirate. Said pirate was currently laughing at her expense. He'd smartly caught her blade in his hook as she'd swung it wildly; not bothering in her startled state to assess whom her attacker was.

"Careful darling," He warned with a playful chuckle, "Otherwise I'm might start thinking that your constant aggression towards me is just as way to deal with your obvious pent-up desire."

She rolled her eyes as he gave her a filthy wink, and pushed his hook away with a little more force than necessary. When her sword was once again safely sheathed, she looked back at him and tried to hide the fact that his nearness bothered her. Emma was convinced that her disdain for his company was a natural reaction to him being a smug bastard, and a pirate. She refused to acknowledge that it might be caused by something else entirely.

"What do you want, Hook?" She asked him, carefully modulating her tone to sound as bored as possible. She spotted a slight twinge of annoyance on his face, as she had used his more "colourful" moniker, as he liked to call it. Emma would rather think of him as Hook; it was a much safer option than Killian.

Any trace that she'd irked him was quickly smothered with a mischievous smirk. He took a step closer, and his smirk widened when she retreated a step.

"What I want, Swan, is for you to swear that you're not going to betray me again," He stated as he slowly encroached into her personal space. His smugness only grew when she stopped retreating, and instead stood her ground. "I want you to swear that you're going to take me back to the charming, little town of Storybrooke with you."

"We already-" She began quickly, as her resolve gave way and the instinct to flee kicked in. Her words and her movements were cut short when he caught her wrist with his hook and pulled her closer to him… and further away from the safety of the other women.

"Tsk tsk," Hook reprimanded Emma as if she were a misbehaving child. "Not we, darling. You." He was standing dangerously close to her, and she could see his eyes glowering in the dark. "We did not leave me at the top of the beanstalk. We did not chain me up in the same room as a giant. I don't need reassurances from we, only you, darling"

As Killian emphasized each 'we', he took a step backwards, and pulled her against him roughly. She couldn't break free of his hold without hurting herself. Emma felt the sharpness of steel against her wrist, but not the sting of broken skin. Memories of the last time he held her like this suddenly danced unbidden through her mind. The cool metal against her flesh, the unexpected bite of the rum, the soft scarf wrapping around her palm, the ghost of his lips against her skin as he gently tightened the scarf with his teeth. He'd gazed up at her with smouldering eyes as he'd attentively tended to her wound. That look was back on his face again, alongside his mounting frustration towards her. The fingers of her healing hand curled against her palm, as if trying to catch the previous memories and keep them within the safety of her grip. A smirk slowly crept across his face, and he looked at her like he knew exactly what she was thinking of.

"I," She began; desperate to break the silence, although she stopped when her heard how husky her voice sounded. The damn pirate's smirk only widened further. Emma quickly cleared her throat. "I swear that if you help us to open the portal, then you can come with us-"

"With me," He corrected.

"Fine. You can come back with me to Storybrooke."

Killian eased her wrist closer until her palm was pressed against his chest. His triumphant smile emphasised the small victory he'd won by her admission. Emma hated him for that. Hated that he'd gotten what he wanted, and still refused to let her go. Hated that he had bested her. She especially hated how much pleasure he got from invading her personal space.

"Now, darling, I think that this would be the appropriate time for us to seal our bargain with a little ki-"

But his words died as her lips crashed against his. Emma didn't know what possessed her to do it. The back of her mind desperately searched for a suitable excuse, but the best it could come up with was the adrenaline caused by the last zombie attack. Which had happen over five hours ago, but she wouldn't admit that it was something else. Something… more. All these thoughts were promptly obliterated when Killian recovered from his initial shock, and kissed her back with equal fervour. Just as abruptly as he'd started, Killian pulled back, leaving her lips swollen and red. Being who he is, he opened his mouth to make a smart quip.

"God, don't ruin this by talking," Emma snapped, as the hand on his chest tightly grabbed his shirt, whilst her free hand tangled in his hair and pressed against the back of his skull. She roughly pulled him back into a kiss.

Killian answered her with bruising force; the pleasure of their contact stirred in him an equally strong desire to punish her for her earlier abandonment. This desire soon left him, as Emma moaned softly when he bit down on her bottom lip. Killian took the opportunity to sweep his tongue into her mouth, and the only desire he was left with was to hear her moan again. His hook was still around her wrist and, along with the arm he'd wrapped around her waist; he used the leverage he had to spin them around and press her against the nearest tree.

He freed his hand and smoothed it across her abdomen, then slid it under her top. His lips slowly trailed from her mouth as he gently peppered kisses along her jaw line before he bit down on the sensitive flesh where her shoulder and neck met. Emma barely managed to suppress a groan as she moved her head to one side to give him better access. She shivered as he ran his fingertips along her ribcage until they met the edge of her bra.

Killian inspected the odd garment with his hand, and she could almost feel the confusion on his face against the skin of her neck. Emma began to laugh when the pirate let out a muffled curse of frustration as he continued to battle with her bra. Her laughter was immediately silenced when Hook deftly pulled the cup down and Emma felt the cool metal of his hook running roughly across her nipple. He greedily swallowed her moans as his weathered finger pinched the sensitive bud, and gave it an experimental twist. His hook leisurely traced down her side until it rested against her hip.

Before Emma realized what was happening, Hook caught the edge of her shirt with his hook before he began to inch the material towards her head at a torturously slow pace. As Killian's lips journeyed down her neck, leaving Emma's skin ablaze, Killian wedged his leg between her own. Emma happily obliged him by widening her stance and she let out a heady groan as the weight of his thigh was pressed tightly against her aching core.

A twig snapped behind them in the dark.

In a flash, they'd untangled themselves from each other and grabbed their discarded weapons. Side by side, they pointed their swords in the direction that the sound had come from. The bush in front of them shuffled a minute before threat emerged.

For a split second, the rabbit remained frozen, staring at the two sword-wielding humans in terror. Then it quickly retreated back into the safety of the under grove before it became dinner. An uncertain moment passed between the pair, before they both broke out in laughter. As their laughter subsided, Killian took a moment to appreciate his handiwork; Emma's face was flushed, her lips swollen from the force of his kisses. Her hair and clothes had a distinctive rumpled look left by lustful hands. But her eyes are what really caught his attention. They were wide and dark, filled with both mirth and passion. He gave her a salacious smile, knowing that his eyes were just as dark with desire as hers.

"Now where were we, darling?" He asked with an enticing glint in his eyes, as his tried to close his arms back around her.

Emma put both hands on his chest, and gently pushed him away.

"I'm going back to watching, and you're going back to bed," she stated firmly, but began to blush as he waggled his eyebrows at her suggestively. "You know what I mean. Go."

Killian sighed dramatically, and paused to whisper, "Until next time, Swan".

With immense satisfaction, he noticed her slight shiver at his words and impulsively planted a hot, wet kiss beside her ear. Killian sauntered away with smug contentment; he'd always known that the Swan girl wanted him. It had taken her longer than he'd expected to admit it, by now that he'd had proof, there would be no stopping the inevitable. He would have her.

Killian strolled past the sleeping women, and into the bushes on the other side of their camp. There wasn't a chance of sleep, unless he relieved the tension of his arousal first. As he unlaced his trousers with a well-practised hand, he wondered for a moment if Emma was doing the same thing. He grinned at this most alluring thought, and let it aid him with his task.