Depending on whether or not I can write a chapter tomorrow, this may be the last update for the next two weeks. I will be traveling in Europe and will not be able to write much while there. If this is the last one for now, I hope you guys have a wonderful few weeks and enjoy this chapter! I'll update as soon as I get home:)

She woke up late Sunday morning with a smile plastered on her face. She traced her finger around her lips for the thousandth time, remembering the feeling of his against them. She rolled onto her back and clasped her hands behind her head. With no agenda for the day, she wanted to take her time and relax before the real stress began for midterms. She moved back onto her side and curled herself around a pillow pretending that it was him. She thought about the first time she woke up next to someone.

She had been dating John for six months and it was the night of senior prom. They hadn't planned to do anything afterwards, but ended up checking into a hotel suite with a few friends for the night. After changing into something more comfortable, someone had brought out the alcohol. Callie, being quite the party girl, had started taking shot after shot of whatever she had in her hand. She was tipsy but not quite drunk when John had swayed her into one of the four rooms in the master suite. He had pressed her against the wall and slipped her shirt off, watching her eyes the whole time. She had smiled and nodded, knowing she was ready. They had spent the night indulging in each other for the first time and finally sleeping at 4 am curled around each other.

Callie had woken up and felt arms around her. She had been confused momentarily before remembering the night before. She had rolled over in his arms and smiled at the sight of her man in the morning. He was a bit scruffy, but he looked peaceful. She had kissed his jaw and woken him up, gently smiling at him and simply appreciating the morning.

Callie loved the feeling of waking to next to someone. She had done it many times before and preferred to wake up first so that she could just watch the other person. Something about the serene state of a person was so intriguing and wonderful to Callie. She saw vulnerability in those who seemed invulnerable. She saw kindness in those who were crude and selfish. She loved the fact that with sleep came a different side of everyone and she adored being the one to see that side.

She curled closer to the pillow and snuggled her face close into it, wishing that it smelled like him. A loud knock came from the bathroom door accompanied by a familiar voice.

"Callie, are you awake? I want to talk," Addison said quietly through the door.

"Come on in Addie," she responded with a sigh, tossing her pillow aside and sitting up on her bed.

Addison entered the room cautiously as though she was afraid to face her best friend. She kept the door ajar and walked over to Callie on the bed. With an annoyed look plastered on her face, Callie silently scooted over to allow Addison to sit next to her. The girls sat in awkward silence for a few moments before speaking.

"Callie," Addison said almost inaudibly. "I'm so sorry about yesterday. I...I didn't mean to yell at you or be that rude. It was totally inappropriate. You know how I get when I'm stressed and shit comes up and-"

Callie cut her off.

"Addison, it's fine. I understand. I shouldn't have been rambling about unimportant things. We were trying to study and I was being distracting. I get it."

Addison smiled at her friend and leaned her head against the wall behind them. She sighed heavily.

"Callie, that's not the only reason I yelled."

Callie looked at Addison sideways, shooting her a confused look.

"I guess...I guess I'm jealous of you Cal. I mean, I haven't felt that way about a guy in so long and I'm jealous that you get to feel it and I don't. I want to feel that rush of adrenaline when you like someone so much you can hardly think about anything else when they're around. I want to WANT a relationship, not just sex."

Addison let her head drop and she massaged her temples with the tips of her fingers. Callie reached over and began massaging her best friend's neck, knowing how calm it made her. Addison dropped her hands and let Callie rub her neck, working out all the knots that she could. Callie dropped her hands gently and hugged Addison from the back, resting her chin on the red head's shoulder.

"It'll happen for you again, Addie. I swear it will. I remember when you felt like this about Derek. I was so jealous. I know how you feel but...can you pretend to be happy for me please? I'm so overjoyed right now because I haven't felt this way about anyone since high school. Hell, I feel like I'm 17 again with the dreams and everything. I just want to share my happiness with my best friend. Do you think that can happen?"

Addison leaned her head on Callie's and nodded.

"I'm so happy for you, Callie," she said.

Callie opened her mouth to tell Addison about the previous day, but held back. She wasn't sure if she should, or rather if she could, talk about Mark with her. Of course if it was anyone else besides their teacher, Callie wouldn't have hesitated for a moment. But this situation was different than most. Instead of telling Addison everything, she had to be quieter about this.

"Thank you Addie, truly. It means a hell of a lot."

The girls sat in silence again, this time appreciating the lack of conversation.

Addison stood up and held her hands out to Callie, willing her to get up.

"You're crazy if you think I'm leaving this bed today!" Callie scoffed and laid back down.

Addison pouted at her.

"I'll tell you about my scandalous night with Alex if you'll come to breakfast with me," Addison proposed with a sly smile.

Callie rolled her eyes and stood up, groaning at the feeling.

"You better make this worth it," Callie threatened.

"I will!" Addison replied with a wink before walking out of the dorm room with Callie in tow.

Callie nervously waited for Addison in the hallway of their dorm before class. She finally dragged her best friend outside and they headed toward the lecture hall. Callie chewed her lip absentmindedly, hoping with all of her might that she would be able to focus on the class with Mark in the room. She silently saw his car in the parking lot ahead of them, but decided not to acknowledge him for fear of having to explain to Addison why she knew which car was his.

"Have you stalked him enough to know what car he has yet?" Addison joked.

Callie laughed and shook her head at her best friend. They were stopped just outside the building and Callie had casually glanced toward the parking lot, invoking Addison's question.

The girls walked into the classroom and took their usual seats. She leaned back casually in her seat trying to clear her mind of the weekend before her professor walked in.

He entered the room nearly unnoticed by most of the student. All of them, really, except Callie. She watched him unpack his things and set up his laptop. Blood began to pulse in her ears and she held back a smile. He gave a welcome to the class and said a bit about their midterm, which Callie had all but completely forgotten at that point.

"Shit," she whispered under her breath.

"What?" Addison whispered back.

"I just forgot how close midterms were, that's all. I just really need to do well," Callie responded.

Addison laughed softly at her.

"Cal, is it to impress him or do you really want to do well?"

Callie's face turned beet red and she dropped her head with a smile. Addison knew her too well.

He began lecturing from the front of the class. She watched him look across the students skipping over her nearly every time. Her wide eyes caught his attention at last and she smiled at him. She nearly laughed out loud when he stumbled on his words and simultaneously made eye contact with her. Their silent flirting was distracting, but she didn't mind. After all, if she needed help with the topics, she at least had someone to ask.

He finished class and dismissed the students. The class rose to leave but his voice rang out once more.

"Is there a Callie Torres in here?" he asking loudly, clearly trying to hide a smile. A chill ran down her back at the sound of her name on his lips and she slowly raised her hands. She felt everyone's eyes on her and faked a quizzical face to hide her blush.

"Ms. Torres, I'd like to see you after class please."

She bit her lip and pretended to be terrified. Her head nodded lightly and she turned to whisper to Addison.

"Hey, I'll catch up with you. I'm not sure what this is about," she said nervously.

Addison nodded to her and walked out, sending her a wink from the doorway.

Callie watched as the classroom cleared out, a smile finally breaking across her face. She watched, still standing where her seat in the classroom was, as Mark walked across the room and shut the door, taking extra care to lock it. She slowly descended down the stairs, admiring him from the side. His nicer pants didn't hug him quite as tightly as his jeans, but his shirt spanned across his chest highlighting every muscle beneath it. She smiled at the way his arms filled out the sleeves and imagined them wrapping around her. She stood on the bottom stair of the classroom, finally making eye contact with him.

"Mark?" she questioned, a smirk donning her face.

He stumbled over a quick hello, claiming he only wanted to greet her and apologizing for keeping her. She tried to pay attention, but couldn't get over the sensual tone in his voice, even when he was saying something so simple.

"Mark, is the door locked?"

He nodded and she came off of the last stair, wrapping her arms around his neck. She planted a kiss on his lips. She smiled gently. His blue eyes shone brightly at her before he closed in for another kiss, pulling her closer.

The phone rang and Callie jumped back in surprise. A blush rose in her cheeks again as he smiled at her and answered the phone. A female voice burbled from the phone and he nervously responded, asking them to wait.

Callie raised her arms in a question and mouthed to him. Who?

"That's the head of the medical department at the school. I forgot that she wanted a meeting. I've got to go now," he whispered to her.

She smiled at him and kissed him once more before strutting out the door, feeling just as wonderful as she had on Saturday. She stood outside the door allowing her heart rate to slow. It had really happened. She was having a fling with her professor.

She was lying on her bed reading when Addison texted her at 8:30 pm. She had intended to go to Mark's office for "office hours" around 9:30, knowing that he usually closed the door at 9.

Cal-

Study in my room tonight for midterms? I have snacks. We'll be done by 11 because I have company coming over ;)

-A

Callie giggled at the text and responded quickly.

Addie-

You little player. Sure. I'll be over in about fifteen minutes. Just have to finish up some things.

-C

Callie tucked her phone into the large pocket of her sweat pants and pulled her computer onto her lap. She opened her email and typed a message to Mark.

Mark-

I have to study with Addison tonight until 11. I'll stop by afterwards. Hope you'll still be there. I'd really love to see you :)

-Callie

She wavered for a second over the content.

Should she say more? Less? Be more suggestive? What if he didn't want to see her?

She shrugged her shoulders and hit send hoping her message was sufficient. Grabbing her books from the floor, she headed into Addison's room.

She returned to her room at exactly 11, changing into her favorite tight red tank top and jeans. She smiled at herself in the mirror before letting herself out and heading to her professor's office. The door was open. She tapped lightly on the doorframe announcing her presence. He looked up from his desk and she watched as his eye went wide at the sight of her.

"Did-did anyone see you come in here this late?" he managed to stutter out.

She smirked at him and shook her head letting her hair fall around her face. She took a silent deep breath before speaking again.

"Professor, I really need some help for this midterm," she said in the most sensual voice she could muster. With shaking hands, she slowly closed the door behind her. "I really don't understand anatomy very well. I think I understand some things, but others just confuse me."

She pouted at the last statement and glided over to his desk, his eyes never leaving her body. She slid slowly on top of the desk and stuck her chest out, shooting him a token eyebrow raise and a seductive smile. His eyes wandered her body. The sight of him lusting after her was enough to set off a wave of heat between her legs.

"Callie, what can I help you with?" he asked her, seemingly trying to joke and hide his arousal.

She paused before continuing. She dragged a finger across her chest and over the mountains of her breasts, watching his eyes wander downwards. She spun slightly on the desk and opened her legs to him. She leaned over his office chair and ran her fingers down his arms before pulling his hands to her breasts.

"Sir," she said, her voice dipping low. "I wanted to know if you could tell me about the female body."

She felt his hands squeeze her gently and she couldn't help but moan at his touch. His arms reached for hers and pulled her to sit on his lap. He snaked his way to her front and continued kneading her breasts. Finding herself unable to contain her arousal any longer, she leaned her head backwards onto his shoulder, opening her neck toward him.

He placed feather light kisses from her ear to her collar bone, sucking gently on her pressure point as he went. Her pulse raced under his lips. She wanted all of him.

She spun to straddle him in his office chair and attacked his mouth with her own. She pushed back on the chair slightly. Her stomach muscles clenched as his arms pulled her closer. Her tongue danced around his, their lips embracing repeatedly. Goose bumps flared on her arms from his touch while his lips traveled down her neck again. He met her lips once more and pulled his mouth back, their heads resting against each other. Their breathing matched and they sat in silence, drinking in their time together.

He mumbled something about having to leave and she nodded sadly. She pulled away to stand up, but his strong arms caught her and pulled her down into another kiss. She smiled and felt her heart flutter. He was better than she had imagined. His lips floated across hers in a whisper.

"I forgot to tell you my good news."

"What is it?" she quietly asked back.

"I'm being sent to the Johns Hopkins Medical Conference in a month. I was chosen of all the staff here!"

The excitement in his voice and the smile on her face sent butterflies into her stomach once again. She smiled as wide as she could manage and planted another deep kiss on his lips.

"I'm so happy for you Mark. That's incredible. Congratulations!" she said with another kiss. "I'll let you get home now. I'll see you on Wednesday."

She kissed him again and sauntered out, feeling the adrenaline leave her body. She got back to her dorm and snuggled into her bed again, cuddling her pillow close.

She walks down the halls alone, calling out for him quietly. He had left a note in his classroom telling her to search for him. She's sick of the game now. She just wants to see him.

"Mark, where the hell are you?" she finally calls out, louder this time. It's nearly 1 am and the building is deserted. A voice wanders towards her.

"Callie, I'm right here."

She turns the corner and sees him standing on the wall, a smile plastered on his face. She walks over to him and hits his shoulder gently before kissing him hello.

"What are you doing here?" she asks him.

He slides his hand down her stomach and his fingertips dance between her hip bones. She breaths in slowly trying to keep her arousal contained. She kisses him again, this time harsher. His hands travel along the seam of her jeans and undo the top button before she pulls away suddenly.

"What is it?" he asks, his hand never moving.

"Mark, really? In the middle of the hall?" she questions, her eyebrow raising slightly.

"Well, if you'd like somewhere more private…" he whispers into her hair. He takes her hand and slides to the left, pulling them into a closet. He immediately pushes her against the door of the small room and slides her shirt up. On his knees in front of her, his lips drag along her stomach and rib cage, touching every bit of skin they can get to.

He pulls the zipper of her jeans with his teeth and slides them down slightly, just enough to slide his hand between her legs. He slips two fingers into her core and hears her moan above him. He pulses in and out, his tongue dancing across her stomach still. He works his mouth downwards and pulls her pants down more, her hands tangling in his hair.

The knot in her stomach grows as his tongue collides with her clit, his lips curling around it and sucking hard. He's moving slowly, enjoying the sound of her moaning.

"Mark," she breaths.

He pushes his fingers deeper and speeds up. Her knees buckle and his free hand is on her stomach, holding her against the door. Her body shakes as her orgasm tears through her, a scream coming from her mouth.

He slides her pants back up her legs and works his way back to her mouth, kissing her softly.

"Still mad that you couldn't find me?" he says with a grin.

She punches him lightly on the shoulder and holds him close, loving the feeling of him.

She rolled over into the wall and hit her head. Reaching a hand up to rub the sore spot, she rolled back to check the time. It was early, but not too early to be awake. She stood up and stretched, walking toward the door to see if anyone else in the hall was awake. A note fell from the door. She picked it up and recognized the scrawled handwriting of her professor.

You're beautiful. Thank you for a wonderful afternoon.

-Mark

She smiled ecstatically at the note and clutched it in her hand before walking back into her dorm and laying back down in bed. She re-read it countless times, her smile never fading from her face.

Her cell phone buzzed from the side bedside and she checked the caller ID seeing that it was Mark. She smiled even wider and answered sleepily.

"Callie," he breathed quickly, his voice refreshing her and waking her up.

"I need to ask a favor of you. I need you to take care of my dog while I'm at the conference."

"Absolutely," she said cheerily. "Just tell me what you want."