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.

Thank you for the reviews for the last chapter! - Angie

"Well, the technical analysts where I work aren't nearly as hot as you are," Derek declared the next morning. And then, with a chuckle, "If they were, I'd know a hell of a lot more about computers. I've barely figured out my Blackberry."

"Yeah, those Blackberries are a bitch," Penelope agreed with a grin. "The iPhone is a much better choice."

"I'll make sure I bring that up to the bureau," he said dryly.

"In your line of work, it's essential that you have the most up to date equipment," she insisted.

"I miss my RAZR," he admitted. "All I had to do was flip the damn thing open when it rang."

Penelope laughed, and they lay there for a moment in silence. She was on her back staring at the ceiling while Derek was lying next to her on his side, his thigh possessively slung over hers. "I wonder how Payton and Desiree are doing without each other," she speculated aloud. That had been why she'd gotten in at eleven last night; Payton had needed to see Desiree before midnight when he would be banned from seeing her until the wedding. She didn't even want to know why. She hoped it was wedding details, but she'd had her doubts.

"T minus…" Derek lifted his head to look at the clock on the nightstand between their beds. "Ten hours," he finished.

Penelope grinned widely at him. "In ten hours, we're going to be related," she said with a giggle.

Derek frowned. "Well, damn," he said softly, cupping her hip with his hand and pulling her up onto her side. "We'll have to get some more frolicking in before then."

"There's a change in the…lineup thingy," Payton announced.

"What do you mean?" Derek asked as his gaze narrowed. When Desiree had rearranged things yesterday morning before breakfast so that he'd been marching with Penelope, he'd thought he'd hit the jackpot. What the hell had his sister gone and done now?

"Penny's marching with Pax, and Derek, you'll be marching with Sarah," Payton announced.

Derek had to bite his tongue so he wouldn't say anything—his stupid 'bridezilla' sister. This morning had been the last time he'd see Penelope alone. They'd certainly made the most of it, but it didn't mean it had been enough.

They'd decided against trading numbers—well, she had. Translation…he'd been a great lay, but she wasn't interested in anything more. She'd assured him that it was because long distance things never worked, but he knew better. Now that she'd gotten off (not solo, he was proud to say,) she wanted to go out and have all kinds of sex. And dammitt, that pissed him off! She shouldn't be having sex with anyone but him!

He wasn't stupid enough to think he was in love with her; he didn't know her well enough for that. But he was crazy about her. It was the closest he'd ever gotten to love, and he wasn't even sure how it had happened; he'd only known her for a few days. She was such a refreshing change from the 'yes, women' he usually ended up dating. She didn't tell him what he wanted to hear. She stuck to her guns. In fact, he could still picture her flying up out of bed when he'd walked in with Gina and Janette, giving them 'the warning' that seemed to be so prevalent during this series of events. And the sight of her in nothing but those snowflake panties sauntering up to him and telling him she'd never been brought to climax by a man before was still vivid in his mind.

When Paxton turned to stare at him, Derek realized he'd chuckled at the thought and immediately sobered. The last thing he needed was one of her damn brothers asking what he was laughing about. You seductive, wildcat in bed sister. He wondered which one would get to him first, fists flying. His money was on Paxton—the man was a brute.

"I'm sorry, what did you say?" Penelope asked. The soft strains of Last Christmas by Wham! was on the radio, and she couldn't help but think that the song would have an entirely different effect on her next year.

Derek had suggested they exchange phone numbers, but she'd sidestepped the idea. She didn't want him to feel obligated to call her. But even more, she didn't want to be waiting by her phone in vain. If he didn't have her number, she wouldn't have to do that. Better to leave things like this.

"She asked where your bouquet was," Sarah answered, then frowned. "Are you OK?"

Penelope nodded as she pointed to the small table in the corner of the room. "It's right there," she muttered.

"You don't seem like yourself," Desiree remarked.

Penelope straightened, then plastered a fake smile on her face. "I'm fine," she insisted, deciding a change of subject was in order. "I was just…remembering Payton when he was younger. I can't believe he's getting married today."

Desiree grinned blissfully. "I'm awfully glad he is," she said softly.

"There's been another change in the order," Derek told Paxton.

Penelope's brother's eyes narrowed. "There has?" he asked suspiciously. "No one told me about another change."

Derek shrugged with what he hoped was a sorry look on his face. "My sister is so indecisive," he said."You'll be marching with Sarah." God, he hoped Desiree wouldn't kill him.

Paxton nodded, and Derek could tell he still wasn't sure if he believed him. "Look, I—"

The words died on Derek's lips as the bridesmaids walked into the lobby of the church. His eyes immediately landed on Penelope. She was stunning in her ice blue colored gown, her hair swept up in an elegant style. The scalloped v neck showed off her generous cleavage. There was a satin mocha colored ribbon a few inches above her waist, and the dress fell down over hips, clinging just so, before it cascaded to the floor. His breath caught in his throat, and he could feel Paxton's gaze on him. He grinned as he turned to the man. "I heard the color of the bridesmaids dresses were ice blue."

"You look gorgeous, Princess," Derek whispered as Penelope came to stand beside him.

"Why am I marching with you?" she returned in a hushed tone as the sound Pachelbel's Canon drifted towards them.

Derek shrugged. "Payton told me that there was a change in the order. I didn't ask questions," he answered. "You look gorgeous," he repeated.

Penelope frowned. "Did he clear it with Desiree?" she asked.

Derek sighed. "I didn't ask questions," he said again.

She nodded, and then smiled as she leaned towards him. "You clean up pretty nice yourself, Handsome," she whispered, taking in the sight of him in his custom fit tuxedo.

Derek grinned as Penelope linked her arm through his, giving his forearm a gentle squeeze. When it was their turn, they headed down the aisle in pace with the pair before them. As they reached the altar and went their separate ways, Derek realized it wasn't going to be so easy to watch Penelope Garcia go.