Author's Note: This is written in response to the CCOAC Christmas Fanfic Exchange. It's written especially for klcm! The prompts were: Last Christmas (by WHAM!), Christmas Memory, Fairy Lights, & Mistletoe. All of them will be used in the story.

Here's the next installment of Pen and Derek's little tryst. My favorite character (super possessive Derek) makes a cameo in this chapter. Enjoy...I sure did! LOL - Angie

"You should see my badge. It's so…big," Penelope said exaggeratedly in her best Supervisory Special Agent Derek Morgan voice.

He chuckled as his hand wandered over her the soft curve of her hip. "That's not how I sounded. I sounded sexy and…sophisticated."

"What the hell was that?" she asked in an amused tone.

"That was me trying to impress the hot chick sharing my room," he told her.

"Right," Penelope said dryly. "Because my ass makes such a good impression."

"Hey," Derek said, reaching for their topic of conversation and giving it a light squeeze. "That happens to be one of my favorite parts of you. In fact, you know what I thought when I first saw that ass?"

"What?" Penelope asked suspiciously.

Derek gave her a lazy grin causing his eyes to squint and nodded his head. "That I wanted a piece of it."

Penelope gave him a light shove in the center of his chest and laughed as she rolled onto her back, then sat up and stood. "We need to get ready for breakfast," she announced, reaching out and grabbing his hand to pull him into a sitting position.

He let her pull him up with a sigh. "Can't we order room service?" he asked, wiggling his eyebrows suggestively.

"If you want Payton to come looking for us, sure!" she said brightly.

Derek sprung to his feet.

"That's what I thought," she said with a triumphant grin.

It was short lived as he seized her wrist and hauled her against his chest. "It's not your brother I'm afraid of," he informed her, his eyes smoldering as he looked down into hers, placing a sound kiss on her lips.

"Then what are you afraid of?" she asked breathlessly, her fingertips curling against his warm chest.

"Not having you again tonight," he answered huskily, then turned and headed for the shower.

Penelope lifted a hand to her tingling lips as she watched him walk away, then turned to her bed. She hadn't slept in it last night, so all she really needed to do was pull the blankets up. She reached for the bedspread when the dark purple t-shirt Derek had been wearing last night captured her attention. She looked towards the bathroom—she could hear the shower running—and then reached for it. She picked the article of clothing up, studied the white Northwestern University logo in the center, then lifted it to her nose, inhaling deeply. She frowned; his scent was barely there, but then again, he'd only worn it for a few minutes. Without a second thought, she reached under her bed, pulled her suitcase out, and secured the t-shirt inside. It might be the only thing she'd have to remember him by. Once she'd zipped the suitcase back up, she went to join him in the shower.

"You guys are late!" Desiree said accusingly as they walked into the dining room.

"We're…sorry?" Derek said cautiously.

"I know why you're late!" she hissed.

"You do?" Penelope asked panicked, looking at the group of people standing there. Oh, God. They were all going to witness her humiliation when Desiree announced she'd been charmed by her older brother.

Desiree groaned. "It's because I'm turning into 'bridezilla' and you don't want to be near me. I'm sorry," she said sincerely. "I don't mean to, but the wedding is tomorrow night, and I'm just…losing it a little. Now…bear with me for a few moments. Derek, stand next to Sarah," she commanded. "And Penelope…right here next to Marcus," she said, grabbing Penelope's upper arms and steering her into place. Then she took a step back and studied the various people paired before her. "No," she said to herself, then grabbed Penelope, dragged her over to stand beside Derek, and positioned Sarah next to Marcus. "Much better. This is our new marching order," she announced with a satisfied sigh, beaming as she looked at the group. She clapped her hands together once. "Now…who's up for breakfast?"

"Are you sure this isn't going to ruin the walls?" Desiree asked, looking around anxiously. Her brother's idea to hang up the garland twined with Christmas lights in their mother's hotel room had been thoughtful, but she didn't want to get billed because they'd damaged the walls putting things up.

Sarah rolled her eyes. "Des, I got this stuff off the television, and they said that when you pull it down off the walls, it won't take the paint with it. It will all come down in one big clump."

Desiree sighed. "OK," she said doubtfully. "But hurry up. Mama will be back soon."

Derek hopped down off the chair and kissed his younger sister on the cheek. "If there's any thing wrong with this room when we leave, I'll fix it myself," he promised, his face softening. "You know how Mama loves Christmas."

"If you were as sweet with the women you date as you are with your sisters, you could be married by now," Desiree informed him.

Derek groaned. "Why is no one razzing Sarah about not being married?"

"Uh…because Sarah's not banging everything that walks by," Desiree said dryly.

"I don't bang everything that walks by," Derek said, defending himself. "Why does everyone keep saying that?"

"Um…because we know you," Sarah said. "You, little brother, are a player."

Derek had earned his reputation while he'd been in college, and it had certainly been accurate then. In recent years, however, he'd gotten selective as to whom he'd sleep with. He didn't typically fall into bed with anyone before taking her out a few times. However, the blonde bombshell sharing his hotel room had him reverting to his old ways. Sure, the first thing that had drawn him to her was the fact that his sister had deemed her off limits, but then he'd laid eyes on those blushing cheeks as she'd looked him up and down. Then she'd opened her mouth. She'd been so flustered it had been adorable. But then he'd walked into their room early the next morning, and that…mistletoe silky thing had practically beckoned to him. How was a man supposed to resist a charming, sexy, funny woman?

He looked at his watch. "We'd better get out of here," he said.

"What's your hurry?" Sarah teased. "You excited to see your roommate?

"I—"

Before he could answer, Desiree was shaking her head. "It's not that. Penny's with Payton. They're at the airport."

"For what?" Derek asked before he could stop himself.

"He's picking up another groomsman. He said it was someone Penelope was definitely going to want to see," she said.

"One of his brothers?" Sarah asked.

Desiree shook her head. "None of them could make it so close to Christmas."

Derek clenched his jaw; that twinge of jealousy that had assaulted him in the bar the previous night pulsed through his entire being this time. He didn't like this feeling, yet he'd had two bouts of it in as many days. He wondered if he could get vaccinated.

Penelope yawned as she stepped off the elevator. It was almost eleven o'clock and she was exhausted. Derek had kept her up most of the previous night-that was by no means a complaint—and then Payton had insisted she come with him to the airport today to pick up another groomsman. She hadn't even given a second thought as to why she needed to be there…she'd been too busy cursing him for monopolizing her time. She only had this last night to be with Derek, and Payton wanted her to go to the airport?

And then she'd seen him…Paxton, her youngest brother (still older than she was) who'd been serving his country in Afghanistan for the past eight months. After several bear hugs and shrieks of excitement (on Penelope's end,) the siblings had gone out to dinner to get caught up. Time had gotten away from them, and only when Desiree had called had they realized what time it was and headed back to the hotel. Her keycard was poised above the lock when the door flew open and Derek dragged her into the room.

"Wha—" Before she could finish, he lowered his lips to hers in a quick, rough kiss.

When he pulled away, she gave him a puzzled look as she took off her coat and then hung it up in the closet. She turned back around to his piercing stare. "Where did you go?" he asked softly.

She studied his face for a moment, sure that the tone he'd used was a hoax. And his sitting position on the bed, though casual, seemed to be forced. "You're not…" No. He couldn't possibly be. But there was no other way to describe the look on his face. "Jealous, are you?" she finally finished.

"No," he said firmly.

"Good. Because…we don't know each other well enough for you to be jealous."

"I'm possessive," he corrected.

Penelope lifted a brow, neglecting to point out that the two words were synonyms. "Pretty possessive over something that doesn't belong to you."

His eyes never left her, his stare so intense she had to remind herself not to fidget. "I'm the only man who's ever gotten you off. I'd say you belong to me."

"I belong to you when we're in bed," she informed him primly.

He stood up, lifted her into his arms, walked over to his bed and dropped her on his mattress. "Like I said…"