A/N: I'm just so happy! I have so much fun writing this, and I'm so glad other people are enjoying it :) I just want to mention that while this will not be casefic, it is the first installment in a multi-part series, and the sequel is a casefic (which I am super excited about!) Most of the chapters for When I'm With You are already written...I'm just tying up the lose ends, and then moving on to Part 2 :)

Enjoy!
xox

[Disclaimer: I don't own Criminal Minds. Unfortunately, I can take credit for nothing but Mia and the storyline.]

Chapter Two

"It's not a big deal. I could pack up today and be home by tonight."

Mia leaned against the counter with a sigh, rolling her eyes at an amused looking Alice. "Don't be silly. When do you ever take holidays? Don't cut them short on account of me. Besides, I'm fine," she told her brother for what felt like the millionth time. "Seriously. Enjoy your last few days of vacation."

"I don't like the idea of you being all alone in the city!"

"I was alone overseas for almost three years," Mia pointed out with a smile. "And you didn't insist on being with me then!"

"Believe me," her brother replied with a huff, "If I could have, I would have. I would have liked nothing more than to go over there and drag your ass back here. But you're back in the country now, and you don't even have any family around to help you get settled."

"I don't need help getting settled. Really, I'm ok."

Her brother was silent a moment, and Mia knew she'd nearly won. "I feel bad that I left town just after you got back. We barely even get to see each other!"

"I will see you Monday," she promised. "I'll come visit you at work first thing in the morning, and then we'll all go out for dinner in the evening."

"Fine," he conceded, and Mia breathed a sigh of relief. "You're sure you'll be ok on your own this weekend?"

"I won't be alone," Mia said, spotting Spencer hurrying across the street towards the store and smiling instantly. "I'll be busy with work, and Saturday night one of the girls here and some of the people from the café next door will be taking me out," she lied, not wanting her brother to know about the new guy in her life this early in the game. "Don't you worry about me."

A few moments later, Mia managed to get her brother off the phone, just in time for Spencer to walk in. She beamed at him, tossed her phone onto the counter, and hurried over to give him a quick kiss. While she'd only known him for a few days, and she wasn't typically one to fall too quickly, she couldn't help but feel happier whenever he was around. He smiled and wrapped his arms around her, enveloping her in warmth and the delectable scent of his aftershave.

"Ready for lunch?" He asked when they pulled apart. "Indian still ok?"

Mia nodded. "Can't wait," she said with a big smile. "Unfortunately, though, I have to come back here for a few hours after lunch. I know we were supposed to hang out this afternoon, but it was pretty busy this morning so I didn't get a chance to do anything with the stack of paperwork waiting in my office."

"No problem," Spencer replied, "Maybe I'll come back and read while you work."

"You would do that?" Mia asked, trying to keep from sounding too hopeful. "Just sit around and wait while I work?"

She was elated when he didn't even hesitate. "Of course," he smiled. "That way we're still spending the afternoon together."

"That sounds great," she said after giving him a quick kiss. "Maybe when I'm done we can grab some takeout and go have that movie marathon we were talking about?"

Spencer grinned. "Sounds perfect."

Suddenly bursting with excitement, Mia kissed him yet again. "Ok," she said happily, "I'll grab my purse and we can go for lunch."

"You guys are too cute," Alice commented quietly when Mia came back to the counter, leaving Spencer by the door. "It almost makes me want to puke."

Mia stuck her tongue out at the girl who was quickly becoming a good friend. "Shut it, missy, or you'll be tackling that stack of paperwork your old boss left me," she warned with a smile. "Now. Spence and I are going for lunch…do you want me to bring you anything?"

"Actually, yes," she replied, a very serious expression on her pale, pointed face. "See if you can find me a one of a kind, totally adorable, completely perfect man who's as head over heels for me as that one is for you."

"I'll do what I can," Mia laughed, glancing appreciatively over at Spencer, who was waiting patiently by the door. "But on the off chance they're all out?"

Alice shrugged. "Maybe a salad?"

Nodding with a bright smile, Mia turned and returned to Spencer's side. He smiled down at her as he pulled the door open, waved at Alice, and stepped outside. Mia automatically slipped her hand into Spencer's, lacing her fingers with his, loving the delightful fluttery feeling she got in her stomach when his fingers tightened around hers. As they walked down the street towards an Indian place Spencer swore by, Mia marvelled at how unbelievably happy and at peace she felt. She'd never really been one for relationships, and undoubtedly had trust issues, but something about Spencer Reid just felt…right.

Spencer sat in the overstuffed armchair in the corner of Mia's dimly lit office, his open book lying forgotten next to him. Mia sat behind a large mahogany desk a few feet away, concentrating on the stack of papers before her. He was mesmerized by the way her grey top kept slipping down her left shoulder, revealing her fair skin adorned with a light dusting of freckles. Her long, dark hair tumbled about her face in big curls, and the way she chewed on her lower lip as she read had his stomach tying itself in weird little knots. When she suddenly looked up at him, a smile reaching her big blue eyes, he was almost certain his heart stopped.

"You're not reading."

"Uh, no," he glanced quickly at the book he hadn't been able to focus on, "I'm not."

"If you've finished that one," she said lightly, "I have a few hundred other books lying around."

Spencer chuckled. "I think I'm good," he replied. "I actually prefer…this."

"Watching me work?"

"Yeah," he shrugged, "It's much more enjoyable than Proust."

A light pink blush coloured Mia's cheeks. Smiling softly, she returned to her paperwork. Spencer took a deep breath and went back to his book. When he'd read the same line a half a dozen times, he gave up and shut it with a snap. His eyes travelled back over to the gorgeous girl who, in less than seventy two hours, had become such an important part of his life. They'd spent the majority of the past three days together, and he had yet to learn something about her that he didn't like. He knew she'd graduated with a MA in English Literature, was terrified of spiders and heights, loved animals, had two older brothers and a nephew whom she adored, and had a number of geeky obsessions like BBC's Sherlock and, to his delight, Star Wars.

"I give up," she said suddenly, setting her papers down and getting to her feet. Spencer watched with interest as she rounded the desk and crossed the little office, coming to a stop in front of him. "Wanna makeout?"

Spencer laughed aloud at her forwardness while nodding enthusiastically. Mia smiled wickedly and took the book from his hands, tossing it gently towards the matching armchair a few feet away, before pushing him back in his seat and, to his immense pleasure, straddling him. His heartbeat quickened when she leaned in and kissed him, gently at first, but deepening it within seconds. It wasn't long before her hands were tangled in his hair—something he found incredibly arousing, to his genuine surprise—and his hands were skimming her curves appreciatively. He was vaguely aware of the fact that they were in an unlocked office and someone could walk in at any moment, but, for some reason he couldn't quite explain, it just made it all the more exciting.

"Mmmm," Mia sighed against his lips, pulling away ever so slightly after several moments. "I feel like I'm in high school again."

Feeling somewhat disoriented, Spencer wasn't entire sure he'd heard her correctly. "High school?"

Mia nodded. "You make me want to act like a silly little teenager."

Shifting slightly so he could see her face, Spencer frowned. "I don't understand."

The quizzical look she gave him was adorable, and Spencer was tempted to drop it and go back to kissing her without clarification. "For real? What part don't you understand?"

"All of it," he replied honestly. "How does kissing me in your office remind you of being in high school? What does acting like a silly little teenager entail?"

"One of the best parts of being a teenager is the steamy, inappropriate makeout sessions," Mia explained, playing with his hair absently. "You know, the ones where you could be caught at any minute? When you just can't get enough of each other and it's all passion and heat and kissing and fun?"

Spencer shook his head. "I didn't really date in high school," he told her vaguely, leaving out the fact that he graduated at the age of twelve. "Or in college, for that matter. I guess I missed out."

A brief flash of sadness passed across Mia's face, but was quickly replaced with a sexy little smirk as she brushed his hair back, leaning in close again. "I guess I'm just gonna have to show you what it's all about."