AN: I've been challenged to guess the kink of a friend of mine and she will only reveal it if I write it so you guys will get to read all my attempts in one easy place. Each one-shot will involve one kink involving the CS ship. Feel free to send me ideas (they are not classified as prompts so I'm not required to write all of them, please understand if I don't write yours, it's nothing personal). They can be a bit tame or a bit naughty. Be creative. This first one was a request from an anon on tumblr. I love masturbation and couldn't say no. It's my own personal kink and I think that's why it turned out the way it did… No regrets. Thank you Nick for your amazing beta'ing skills. Enjoy!

THE CHALLENGE

Masturbation Kink

Killian threw his body over hers as she writhed underneath him, his fingertips lightly smoothing the sensitive skin of her bare torso, making Emma shiver in response.

His touch was electric and addicting. Everything he did to her set her on edge, an edge she never wanted to back down from. He was constantly keeping her on her toes, the toes that were now curling in fervent anticipation.

"So responsive, Emma…" he murmured against her bare chest, his mouth attacking one of her straining nipples as she eagerly rocked her panty-clad clit against his rock-hard erection. Emma gasped in pleasure, her head thrashing from side to side, giving herself over to him completely.

Her legs quivered as Killian watched her intently with darkened and hooded bedroom eyes, his mouth laving over the sensitive bud.

Killian's good hand travelled forward from the taut skin of her abdomen, tracing across the valley of her breasts and up to her mouth, his fingers gliding against her soft pink lips to coax them open for him.

Emma accepted two of his fingers into her mouth, sucking them in time with the movements of his mouth against her breast. She moaned around his fingers, the long digits hitting the back of her mouth, the cold metal of his rings sending shivers of pleasure of her spine.

The sight was erotic and needy, their hips never ceasing their sensual dance.

"Are you ready for me, Emma?" He teased, tugging gently at the abused nipple in his mouth.

Emma nodded vigorously, her eyes watering at the never-ending lust that invaded her senses.

Killian tugged his fingers out of her mouth, trailing his wet fingers against her skin and journeying to the apex of her thighs. She let out a sharp gasp of surprise when his fingers made contact with the damp patch of her panties, rubbing methodically, her hips bucking wildly up against his touch.

"So wet for me, Emma…" he purred, tagging his fingers against her aching clit over her panties.

Emma's eyelids fluttered closed with the overwhelming sensation, her mind flickering back to a vision of him pleasuring himself for her. Her hand found her breast, kneading the flesh softly as she bit her lower lip, seemingly getting herself off to the thought of him touching himself as she brushed her clothed sex over his waiting fingers.

Killian lowered his mouth to her core, mouthing against the wet fabric. "What do you want me to do to you, Emma?"

She moaned in response, her hands falling into his dark locks and pulling him roughly back up to her mouth to connect their lips in a hungry kiss.

Killian growled into her mouth, the sound reverberating through her entire being. Her hand roved against his silky chest hair, her nails raking against the hard planes of his muscular chest. Killian nipped at her abused lower lip, his good hand hitching her leg across his lower back as he drove his hips wildly against hers.

Emma could feel every hard inch of him against her. Her finger tips brushed against his hardened length, making him gasp into her mouth.

"Gods, Emma," he whimpered huskily against her bruised lips, "what do you want me to do, sweetheart? Tell me." He pleaded with her, his forehead pressed up against hers, his breathing coming out in harsh pants, his quickening pulse singing her praises.

"Touch yourself! God Killian, I want you to touch yourself!" she cursed, her confession tumbling from her lips without control. She needed him to do this, her body practically begged him to do it. She couldn't stand it anymore, her body keening against him desperately.

Killian's eyes widened at her bold proposal, his savior far kinkier than he originally gave her credit for. "Are you sure, love?"

"Never been more sure of anything in my life. I want to watch your pleasure yourself, see the look on your face as you come for me…" She trembled in his arms, the visions assaulting her brain, "Fuck Killian!" She bit her lip, hard enough to draw blood, anything to keep herself from losing herself. What he must be thinking of her right now she had no idea.

"Anything for you, Emma," he caressed her cheek lightly, brushing a lingering kiss upon her lips before lowering his body further down, stopping to drag her panties over her legs and bearing her quivering sex to his gaze.

Killian's eyes dilated with lust as they darkened, boring into hers, burning her with just his look.

Emma swallowed, throwing her arms up over her head to watch him.

He situated himself on his knees in front of her, a leg on each side of her, his crotch hovering mere inches away from the apex of her thighs.

Killian, ever the exhibitionist, moved his hand up and down his cock, giving it a few teasing thrusts before dipping his fingers into her core, soaking his fingers with her juices.

Emma brought herself onto her elbows, rocking her cunt against his fingers. Killian pulled out his three middle fingers, dripping with her arousal and brought it to his shaft, coating it with her slick wetness.

Killian brought his fingers up to her mouth ordering her to suck. She complied happily, tasting herself on him.

Emma released him with a wet pop, taking in her shady grin and her debauched appearance, her hair messy and tangled with the proof of their activities spread over her mouth. Killian thumbed at the liquid in the corner of her mouth, gathering it up and licking the moisture off of the digit.

Killian gripped his rigid cock by the hilt, rocking back on his knees as he glided his hand over it slowly, torturously. Emma's mouth fell open at the sight, taking in his wild hair, sticking up at a verity of different angles as he pumped himself, his thumb swiping the weeping tip of him, tearing a strangled moan from his lips. His hips mimicked the same thrusting motion he would if he were inside of her, his hand jerking vigorously, his mouth opened wide in a silent cry of ecstasy as he threw his head back in pleasure.

He snapped his head back forward, bucking his hips against his hand, picking up his pace against himself, his tongue sweeping against his bottom lip in concentration.

Emma couldn't tear her eyes off of him, mesmerized by the sight of him pleasuring himself, her juices coating her inner thighs and running down her backside at the erotic vision in front of her.

"Emma…" he whined, his eyes clamping shut against the strain, the sound of her name breaking her reverie, "Emma, touch yourself for me, love." He instructed lowly, huskily.

Emma's fingers traveled down her body, reaching her dripping sex, her fingers brazenly stretching to stroke herself along with his thrusts.

"That's a good girl…" he roughly nodded his encouragement, pumping his fist relentlessly against his length, the pressure building inside of him, threatening to escape.

"Fuck, Emma!" he cried out, his movements becoming sloppier with the fast approach of his orgasm. "Touch your clit," he rasped, the pleasure so intense as it struggled to reach the surface.

Emma did as she was told, bringing her fingers to rub at her clit, a throaty moan tumbling from her lips as she began to pant.

"That's it," he breathed, throwing himself over her body, jerking himself right against her taut stomach, "gods, Emma, ride your fingers love, pretend it's me."

Emma shoved two fingers inside of herself, bouncing her cunt against her fingers.

"Tell me what I do to you, love," he whispered against the shell of her ear.

Emma threw her head back, arching her back at his words as she fucked herself in reckless abandon, choking for her words, "Fuck Killian! You feel so good… so so good!" she screamed, her head thrashing against the pillow behind her.

"Are you going to come for me, Emma?" He asked, his voice low and husky, his movements slowing down on his cock, giving her time to catch up.

Emma nodded, digging her teeth into her lower lip.

Killian had never regretted not having two hands as much as he did now, this time he missed it most. "Brush those lovely fingers against that spot, love, let me hear you scream for me." He told her, his voice dripping with sin.

Emma curved her fingers inside of herself, touching that spot inside of her that sent her crying out her release as white hot heat exploded against her closed eyelids. "Killian!" she screamed her climax, riding out her fingers as she writhed underneath him.

Killian sped his thrusts back up, drawing his hand quickly over his length as his balls clenched with his impending release. Killian's grip slackened, hitting the skin of her stomach with every messy thrust of his hand against himself. Killian reared his head back, emptying himself on her stomach with a shout, his fist carrying out its work until he had milked every last drop of himself from the tip.

Emma moaned as she felt his warm cum spurt against her stomach.

Killian's chest heaved with the force of his long, languid breaths as he rolled off of her onto his back to recover. Killian looked in her direction, his beautiful savior utterly wrecked, drenched in his cum.

He cupped his mouth with his hand, sliding it down the scruff of his chin to wipe away his smug grin.

His princess was down-right naughty—and he loved it.

AN: So that may be one of the dirtiest things I've ever written in my life. Like, that was straight-up porn, for real. It was also a little lengthier than what I had originally planned but oh well. What did you think?