Meredith couldn't help but stare at her boyfriend as he stood at the front of the room, his guitar strapped over his shoulder as he quietly tuned the strings. She'd watched him play before, but mostly just for her students and messing around with his dad in Michael's music shop. But now, he stood in front of her wearing jeans that fit him amazingly well and a light blue button down that was only button halfway, allowing her to sneak a peak at the strong chest she loved to be crushed up against.

Derek Shepherd was hot, and there was still apart of her that couldn't believe that he was actually hers, that she knew without a doubt that she would be going home with him tonight, after the celebration of the new year.

Mark's house had apparently been abandoned by his parents in favor of a Mediterranean vacation, and he'd taken the opportunity to invite practically everyone he'd ever met over for New Year's. Derek had been good about staying close to Meredith, introducing her to several people that he'd gone to both college and high school with before Mark had shoved him to the front of the living room where the band equipment had been set up. Now, Meredith stood alone against the far wall of the room, sipping a beer as Derek's eyes met hers and he held her gaze for a long moment, causing her skin to heat and her knees to go weak.

After a long moment of intense eye sex, their trance was broken as Derek was pulled into the group huddle of the band. He smiled widely at her as he strummed the guitar slowly a couple times, ensuring that it was in tune before the band began to play.

"Hi," Meredith heard a voice say from her left, and she turned to smile politely at the man approaching her, a beer in his hands.

"Hi," she said distractedly, turning to look at Derek as he leaned into the microphone. Damn, he was hot.

"I'm Ian," he said, offering her his hand.

Meredith stared at his hand for a moment before she smiled slightly. "Meredith," she said without offering her hand.

"This is a pretty great party, isn't it?" Ian asked, leaning against the wall beside Meredith.

"I guess," Meredith shrugged, her eyes moving back towards Derek.

"How do you know Mark?"

"I'm actually dating his best friend," Meredith said without taking her eyes off of Derek.

"You're dating Derek Shepherd?" Ian asked, stepping back slightly.

"I am," Meredith smiled. "You know him?"

"I do," Ian nodded. "I'm actually impressed that he managed to land someone as beautiful as you."

Meredith rolled her eyes as she turned back to look at Derek. His eyes met hers, a fiery expression on his face. As the song finished, Derek kept his eyes on her and smirked slightly.

"Alright, this song is dedicated to Meredith," he said in a deep voice that made Meredith's spine tingle. She swallowed hard as she stepped closer to the stage, watching in curiosity as Derek's eyes darkened considerably as he began singing, his fingers flying over the fret of his guitar as his shirt began to cling to his chest with the sweat that was collecting on his body. Meredith shifted uncomfortably on her feet as she felt the familiar feel of arousal rush through her body. Derek was jealous, which was completely ridiculous if she thought about it, but right now he looked too hot to deal with it. As his eyes bore into hers, all she could think about was what it would feel like to throw his guitar to the side and have her way with him right there in the middle of the party.

"Are you okay?" Ian asked, suddenly appearing at her side. "You look flushed."

"I'm fine," Meredith responded quickly, glancing at him for a moment, considering her options. She usually hated jealous Derek, but right now, with a couple beers in her and a guitar strapped over her shoulder, jealous Derek was just plain hot. And if she added fuel to the fire…she couldn't imagine how hot he would be then.

With her eyes still on Derek, she stepped closer to Ian, finally turning her eyes to him as she ducked her head closer to his, giggling softly as she continued glancing at Derek, his face turning bright red. This was fun.

The second the song was over, before the drums had even stopped, Derek's guitar was resting against the wall and he was making his way towards Meredith, his eyes locked on hers with a fiery passion. Meredith held her breath as he grabbed her arm, finally tearing his eyes away from hers to meet Ian's. "I need to steal her away," he said as he dragged her towards the kitchen.

"What…Derek," Meredith breathed as she stumbled after him, breathing hard as he pulled her towards the stairs. "What are you doing?"

Derek ignored her questions as he dragged her up the stairs, pulling her into a room at the top of the stairs and slamming the door behind her. "You're flirting with other guys?" he asked, his gaze boring into hers as he crossed his arms over his chest.

Meredith swallowed hard as she stared at him, her body heating at the way he was staring at her. "Does that make you jealous?" she purred, tilting her head to the side.

"You know I don't get jealous," Derek said in a low voice. "But it does make me very angry."

"Hmmm," Meredith nodded. "What are you going to do about it?"

"You're mine," Derek practically growled. "Mine."

"I don't belong to anyone," Meredith snapped, knowing that she was only making him more agitated.

"Meredith," Derek groaned, reaching out and pulling her close to him, kissing her hard as he let his body rub against hers. "You're mine."

"You think you can just claim me?" Meredith snapped, trying to pull away from him and squealing in surprise as Derek pushed her onto the bed behind her.

"Yes," he breathed heavily, reaching down to pull her shirt over her head. "You're mine."

"You want me, Derek?" Meredith breathed, reaching out to tear the buttons of his shirt open.

"Yes," he breathed, pulling her jeans over her hips and throwing them to the side.

"Take me," she whispered in his ear, biting it hard as she wrapped her legs around his waist, her naked body teasing his erection that was still trapped in his jeans. "I need you, Derek."

Derek groaned as he pulled his jeans off, pushing her onto her back and pushing himself into her without any sense of foreplay. "Mer…." he groaned as he pounded himself into her, his movements quick and fast as he tried to claim her as his own.

"Derek!" she screamed, her hands going to his back and clawing wildly. "Derek, oh God!"

"Mine," Derek breathed as he continued to thrust hard into her, gripping her hips tightly.

"Derek…." his name came from her lips in one long moan, and she forced her hips up to meet his, her body trembling beneath his touch. "Please…."

"What do you want?" he murmured, stilling inside of her and looking into her eyes.

"I want…harder," Meredith breathed, her hips grinding against his. "I want it hard."

"I can do that," Derek nodded, lifting himself over her again as he began thrusting into her harder than before, taking Meredith's hands and holding them steady over her head. "You're mine."

"Yours," Meredith gasped, her eyes falling shut as she struggled to tear her hands away from his, reaching for his hair. "Yes, Derek. Yes!"

"Oh God," Derek moaned, his pace picking up as he felt himself coming closer to his peak. "Meredith…mine."

"Derek!" she screamed, her body tensing beneath his. "Oh, Derek…."

"Meredith," Derek groaned as he felt himself release into her as her body tightened around him, both of them moaning in pleasure as he thrust a few more powerful times, finally collapsing on top of her, his head resting on her chest as his warm breath tickled her throat.

"Oh my God," Meredith breathed, a shaky hand going to stroke his damp curls. "Derek."

"Hmmm," he moaned in appreciation as he shifted to lay next to her.

"Jealous sex is hot," she giggled, turning on her side to look at him.

"I'm not jealous," Derek said automatically.

Meredith rolled her eyes. "Right," she said. "That's why you had to keep screaming that I'm yours."

"That was just…a fact," Derek argued weakly.

"Right," she sighed as she ran her hands over her chest. "I can't believe I just slept with the lead singer of the band."

He laughed as he tightened his arms around her. "Music turns you on?" he asked.

"Only hot ones who moonlight as doctors," Meredith breathed, tilting her head up to kiss him gently. "I can't believe you play like that, Der. You're really good."

"Thanks," Derek shrugged. "My dad was a musician, he opened the store when Kathleen was born, but I grew up playing the guitar. I barely remember not being able to play."

"That's nice," Meredith smiled, threading her fingers through his. "Are you going to teach…your son?"

"Hmmm," Derek shrugged. "If he wants to learn. I'm not going to be the type of parent who makes his kids do things they don't want to."

"Hmmm," Meredith nodded, wincing slightly as she shifted onto her back.

"You okay?" Derek frowned.

"I'm fine," she nodded. "Just…rough sex."

"Did I hurt you?" Derek frowned, pulling back to look at the bruises already starting to form on her thighs. "Mer, I'm sorry."

"I'm not," she giggled, rolling closer to him. "It was amazing. You're hot when you're jealous."

Derek sighed as he pulled her closer. "Well, I'm not sorry for the sex, but I'm sorry for hurting you," he breathed.

"I'm pretty sure you'll have some battle wounds as well," Meredith giggled.

"Considering the fact that your nails could more accurately be described as claws, I would say so," Derek laughed.

"Do you have to keep playing?" Meredith whispered into his chest.

"I don't have to," he whispered. "Do you want to miss the party?"

"We could have our own party," Meredith whispered seductively, rolling on top of him. "What do you think?"

Before he could respond, the door burst open and Mark stumbled into the room, a leggy blonde trailing behind him. When his eyes landed on the couple on the bed, he groaned and rolled his eyes. "Seriously, Shep, did you honestly just have sex in my bed?" he groaned, moving to cover his eyes.

Meredith blushed as Derek quickly pulled the covers over their bodies, and Derek just laughed. "Like you've never done it to me."

"I have never had sex in your bed," Mark rolled his eyes.

"Well….consider they payback for all the nights when I had to sleep on the couch in high school because you were having sex in our room," Derek shrugged.

"This is disturbing," Mark said. "Just…put some clothes on. It's almost midnight."

"Get out," Derek laughed, watching as Mark grumbled under his breath. He turned to look at Meredith, who was cowering under the sheets, her eyes wide. "You okay?" he asked.

"Mark just saw me naked," Meredith snapped, grabbing her shirt from the floor. "Naked, Derek."

"He didn't actually see anything," Derek pointed out.

"Seriously?" Meredith cried. "Derek, you go all cave man on me because some guy starts talking to me downstairs and then Mark walks in while we're practically having sex and you're okay with it? What kind of twisted logic is that?"

"Meredith, calm down," Derek said, reaching for her hands. "I don't want to fight with you on New Years."

"Maybe you should have thought of that before you were a complete and total idiot," Meredith muttered, crossing her arms over her chest.

"I don't actually see what I did wrong," Derek stated.

"You just had sex with me in Mark's room!" Meredith exclaimed. "You could have taken me to another room or at least locked the door."

"I wasn't exactly thinking clearly," Derek said as he pulled her into his arms. "It's just Mark, Mer. He knows you're off limits."

Meredith sighed as she leaned into his embrace. "It's just embarrassing," she whispered.

"I know," he sighed. "Though I should show him to scratch marks on my back. He'd be impressed."

"You're an idiot," Meredith rolled her eyes as she reached for his hand. "Ready to go back down?"

"I suppose," Derek sighed.

Meredith giggled as she led him towards the stairs. "You know I don't go back to work until the third," she said, resting her chin on his shoulder. "Which means we have two full days together."

"Well, I like the sound of that," Derek smiled. "Do you have plans for those two days?"

"Well," Meredith breathed in his ear. "I was thinking we could watch some movies."

"Movies," Derek nodded, smiling as they entered the living room. He collapsed into an armchair and pulled her onto his lap. She smiled as she wrapped her arms tightly around his neck, effectively cutting out everyone else in the room.

"Movies," Meredith nodded. "You see, I found some very…interesting movies underneath your TV."

"They're Mark's," Derek said quickly.

"Oh," Meredith nodded knowingly. "Well, if they're Mark's, then I guess you have no desire to watch them. Which is disappointing, because I was thinking that we could watch them and then maybe…act them out ourselves."

"Oh," Derek groaned, shifting her slightly in his lap. "Well, I mean, just because they're Mark's, that doesn't mean that I won't watch them. If that's what you want."

"Good," Meredith smiled, kissing him gently before she pulled back and stood, dragging him to his feet. "It's almost New Year," she whispered, pressing her body close to his.

"It will be a great year," Derek whispered.

Meredith smiled as she looked up into his eyes, her fingers playing with the curls at the nape of his neck as the room began to count down to midnight.

"I love you," Derek breathed, as soon as the countdown hit one, and he pressed his lips against hers in a firm, passionate kiss.

"Derek," she moaned against his mouth, tightening her arms around his neck as she opened her mouth, his tongue immediately seeking her own, gently caressing the inside of her mouth. "I love you too."

They kissed softly for a few minutes, long after the rest of the room had resumed to partying, and when they finally pulled back for air, Meredith grinned up at him. "Happy New Year," she whispered.

"Happy New Year," Derek replied, leaning his forehead against hers.

"Can we go home now?" she whispered, her breath hot against his mouth.

"You don't want to stay?" Derek frowned.

"We could stay," Meredith nodded slowly. "But I was thinking…if we go home now…I want to make love to you, Derek."

"Oh," he groaned, nodding as he grabbed her hand. "We can go home."

"That's what I thought," Meredith giggled as she followed him towards the door. "Derek?"

"Hmmm?"

"Thank you," she whispered. "For a good start to the New Year."

He smiled softly as he squeezed her hand. "My pleasure," he said softly. "Now come on."

Meredith giggled as they ran through the snow out to his car. Maybe this year really would turn out to be one of the best ever.