I'm jumping right into the 'hot water' here, but don't expect them to be loving or affectionate right from the start. They don't really like the fact that they're attracted to each other, so their encounters are a little rough around the edges at the beginning. :-)

Special thanks to my beta reader mearcats. This story wouldn't be as good as I hope it is without her.

Part 1 - Instant Attraction

Chapter 1

She shouldn't be here. She knew she should just turn around and walk away. Her mind was telling her over and over again that she had to forget him, that she should find someone else to hook up with, that she could find good sex just around the corner.

Her mind was telling her not to see him again, but her body wanted him. And only him.

She'd tried to break this unwelcome addiction by using all her toys whenever the urge to go to him arose. Having a vampire roommate was definitely helping with that matter, since it gave her access to all those kinky vampire sex shops. You could get everything imaginable there, and a few things you'd never even dreamed of in your wildest fantasies.

But no matter how often she made use of those special toys it was never enough. It always ended right where she was standing now. In front of the portal that would lead her into his world.

She hated the world she was about to enter. Tried to avoid it at any costs. Everything about it gave her the creeps. But it had been another hard day at the office, so to speak, and she needed the release she knew only he could give her. She didn't really have a choice here.

Deep breath. And another one.

Closing her eyes, she held her breath and concentrated. Lifting her hand, she pressed it against the door in front of her, feeling the slight vibrations tickling her skin as she shifted her body from one world to the other.

The sensation was always uncomfortable, as if her body was squeezed through a small gap. The sounds around her changed, the air. The clean smell of her world was replaced by the stale air of the other world. The odor of ash and rotten grass lingered around her and she took a deep breath, adjusting herself to this side before she opened her eyes.

The way to his apartment from the portal wasn't far, but walking in this world was a whole lot more difficult than in hers. It was like trudging through mud, every step more exhausting than the one before. She was panting heavily by the time she reached his door, but nonetheless she lifted her hand and knocked, knowing that what was waiting for her behind the door would wear her down even more.

"Who's there?" his voice drifted out to her, the lilt in his tone shooting the first shivers down her spine, her stomach clenching painfully.

"It's me," Emma said softly, not having to wait long before the door swung open a second later, and she entered through it.

For a moment she caught a glimpse of his real body, a fluttering of a wing as he disappeared around the corner but when she stepped into the room, he was in his usual attire. All in black leather with a hook as a hand, black eyeliner around his startling blue eyes, and a cocky smirk on his face.

The perfect illusion.

"Wouldn't have expected you back so soon, love."

She just shrugged her shoulders and walked over to him, wrapping her hands around his neck and pulling him down to her. He didn't need an explanation. He knew why she was here. Knew why she came back to him over and over again.

Her fingers reached for the zipper of his pants, a moan escaping her as she wrapped her hand around his still human-sized cock, feeling it pulsating hot under her fingers. Her body already ached with the need to feel him inside her, knowing that his cock would enlarge even more later. She shivered in his arms, his kiss turning hungry and possessive, her fear of pain and need colliding. It was always like this. She knew it would hurt immensely, that she wouldn't be able to walk without feeling pain for at least a week afterwards, but she still couldn't stay away.

A moment later her clothes were ripped off her, the fabric hanging down in shreds from her body as he closed his mouth around her nipple and bit down, shooting the first wave of pain through her while two fingers slammed into her, taking her breath away.

"Have you recovered from the last time?" he rasped, his hot breath brushing over the damp peak, his tongue lashing out and flicking over it, making her shiver. "Are you really ready for another round?"

"Yes," she moaned as he added a third finger, sliding them harshly in and out of her. "God, yes."

He was naked a few moments later, pushing her back until she hit the table and she climbed up, his hands pressing her legs apart before he stepped between them.

"Ready?"

Emma just nodded, biting her tongue in anticipation of the pain he always let her feel when he plunged into her. He didn't disappoint her, and she screamed as his scorching hot cock pushed into her, her nails digging into the wood as he immediately enlarged his cock inside her, stretching her wider and wider, the pain rushing in waves through her body. Gritting her teeth, she tried to get through the pain but then his finger brushed over one nipple and the pain subsided to a bearable level almost instantly as he pumped pheromones into her through his hand.

Every inch of her body he touched was burning despite the chemical soothers he was shooting through her body, and then he plunged into her again and she cried out, another gust of pheromones pushing through her as he balanced out the pain he caused her.

He was taking her hard, shoving his enormous cock roughly into her and it hurt, but she just wrapped her legs tighter around his waist and bucked her hips into his.

God, she was insane. But she needed more. Wanted more.

"God, Killian," she breathed, her head lolling back as his hard thrusts almost made her cross the line between pain and pleasure. "More. Give me more."

The stream of pheromones suddenly stopped and she screamed again as his hot cock burned inside her, the pain almost unbearable. Her breath was coming out in harsh gasps as she struggled to keep conscious and he swelled even more inside of her, stretching her to her limits, still pumping in and out of her in a frantic pace.

"Gods, Emma. You're so beautiful."

Dark spots appeared at the corner of her eyes, her heart racing in her chest, the pain so intense that she was close to blacking out and then his fingers pressed against her sensitive bundle of nerves, shooting another gust of pheromones into her system while rubbing her clit frantically. She gasped, stars exploding behind her closed eyelids, her body shaking with the jolts of her climax rushing through her and she almost blacked out as his cum burst into her. Hot liquid fire, burning and healing her at the same time, causing another orgasm to rock through her.

Her whole body was still throbbing and her heart galloped in her chest as he pulled out of her, and she couldn't suppress a whimper when his still hot cock slid along her sore walls.

"Need a hand, love?"

She knew what he meant but she could take care of it herself. A few deep breaths and some concentration, and the piercing pain subsided as she sent a stream of healing magic through her body. She couldn't heal herself completely, though; a dull pain always remained, especially between her thighs. It would feel as though his cock was still inside of her for another hour, making it almost impossible to walk, but she gritted her teeth and hopped off the table, swirling her hand to set her clothes back together and slipping into them with clumsy movements.

"You should probably wait a little longer the next time, Emma. Your magic can never heal you completely. You shouldn't exhaust your body like that."

The tenderness in his tone made her throat close up and she looked up at him, her fingers itching to brush over his scruff, her sore body longing to just slip into his embrace and relax. But that wasn't possible. Not with him.

"As if you didn't enjoy it," Emma huffed, shrugging her jacket on.

"Oh, I love to fuck you, witch," he snarled, all tenderness gone from his voice. "But I'm a demon. I don't feel pain."

Right. He was a demon and she shouldn't be here with him. Every time she came to him she told herself it would be the last time. But they both knew she would come back. She always came back.

She walked quietly through the hallway, hoping her roommate wasn't up yet, but the sound of a door opening told her that she wasn't that lucky.

"You were with him again."

"None of your business, Graham," she said as she walked past him.

"For God's sake, Emma. He is a demon."

"Half demon."

"You can't even walk properly," he huffed as he followed her into the kitchen. "You will be sore for at least a week. But I guess he has pumped you full of pheromones so you didn't feel it when he was fucking you."

"You are one to judge. Don't tell me you and Ruby aren't doing the same. Last time I stumbled over you two in the kitchen you'd gorged on her blood and brought her close to death, and it was a few hours before full moon," Emma replied harshly. "Don't tell me with whom I'm allowed to have sex, vampire."

"He'll kill you one day."

"We have everything under control."

"Have you?"

Emma didn't answer and just turned towards the coffee machine, needing the caffeine desperately. She ignored the unsettling feeling in the pit of her stomach that was telling her that Graham's concern wasn't without reason. They were getting more reckless every time they met, but what frightened her most was the fact that she actually enjoyed the thrill of danger. There were worse ways to die, if you ask her, then breathing your last breath while a demon was fucking the living daylights out of you.

"I'm just worried about you, Emma."

"I know," she said softly, turning around to face her roommate. "But there is nothing you need to worry about. I'm a grown woman. I know what I'm doing."

Graham's skeptical look was echoed by her mind, making her wonder if she really knew what she was doing. She was fucking a demon on a regular basis, and one day he might lose his control and burn her alive, or the demon or witch council found out about them. She didn't even want to imagine the hell that would break loose if that ever happened. The demon and witch worlds hated each other with a passion, and any liaison between those two worlds would be condemned. Not to mention that the witch council would blow a gasket about the fact that a witch was being intimate with a demon. Killian only being a half demon wouldn't help in the slightest.

"I gotta go," Graham's voice yanked her out of her thoughts, and she gave him a shaky smile as he leaned forward and brushed his lips over her cheek. "How about you try getting some sleep?"

"Will do," she replied, every single bone in her body aching with exhaustion. "Bye."

Wrapping her hands around the hot mug, she slipped on a stool, groaning softly when her sore muscles protested. Closing her eyes, she took a sip of the much needed coffee, letting her mind drift back to the first time she met the demon in question.