Title: Doctors don't make promises, do they?

Author: Nelfy
Characters: Callie Torres, Erica Hahn, Callica ship, slight mentions of Mark, Christina and Addison
Summary: This fanfic shows what happened during the season 4 finale and goes further to explore the relationship between Callie and Erica.
Spoilers: Starts with the season 4 finale
Rating: T (will change to M in upcoming chapters)
Disclaimer: Characters belong to ABC and Shonda Rhimes

Author's Note: This is my first fanfic, so comments, suggestions and tips are desired and appreciated! The chapter titles are song titles by one artist, shouldn't be too hard to find out by whom ;-). Enjoy!

Chapter One – Threesome

I had been horny all day. Having barely been able to concentrate on the surgery and on repairing Cement Boy's limbs, my body was aching for release. Luckily, there was always manwhore Mark at my disposal. I wasn't really that much into him, but sex with him was hot and amazing and there was no need for love. Besides, hot sex was way better than no sex at all. Because if I went too long without sex, thoughts of Erica, my friend Erica, kept creeping into my head and I just couldn't take that. Yeah, sure, she had kissed me in that elevator, but really, that kiss was just to tease Mark. I knew that Erica did not like Mark, mainly because he just couldn't stop hitting on her. I guess she also didn't approve of the fact that I slept with him, even though she tried not to show it to me. After all, it was my sex life and she had told me after our talk about "being lesbians" that she didn't have the right to interfere with my sex life just because we were friends. Friends. That's what we were, Erica and I. Just friends. I tried to not think about her, because my feelings when she kissed me had not been feelings anyone should have for a friend. Those feelings were more along the line of ripping off each others cloths and then making love. Not just sex, like I did with Mark, but real love. The kind of lovemaking where you pour your heart into the other person's body. Sigh.

Callie was waiting for Mark to change and then they wanted to finally leave the hospital and the endless day of Cement Boy behind them. Even though Mark knew that Callie was not romantically interested in him, he still couldn't resist having sex with her all the time. With Callie, everything was easy. She was beautiful and hot and she didn't mind his dirty talk about threesomes. Callie didn't mind that he did not love her or went out on dates with her. With Callie, sex was just what it was: a way to release tension and have some fun. Actually, a lot of fun, since Callie couldn't get enough of Mark ever since Erica had kissed her in that elevator. It wasn't like Mark hadn't been turned on by the kiss, but he was definitely surprised by how much Callie had been turned on. That night, she came four times before she had enough and she nearly wore Mark out, which rarely happens. While Mark didn't know what would happen between Callie and Erica, he enjoyed standing back and watching the whole thing unfold. And, a small part of him was still hoping that maybe, just maybe, the threesome would actually take place.

Mark and Callie took the elevator and stepped outside of the hospital.

"So, you wanna finish what we started yesterday?" Callie needed to get off, she was starting to fantasize about Erica's lips again.

"Or, you could finish what you started?" Mark hadn't planned on saying that, but when he saw Erica going through her purse in front of the hospital, he knew it was the right thing to do. Callie saw Erica and then turned her head back to look at Mark questioningly.

"I'm growing. Go, get out of here".

Callie looked uncertain, but then she took a deep breath and started walking towards Erica. She had no idea what she would say or how to explain to Erica that they might actually be more than just friends, even though they had laughed about the idea days earlier.

"Hey. I wanted to see if you wanted to grab a drink." Callie was nervous, though she didn't really understand why. She was just talking to Erica, her friend. Erica, on the other hand, was still going through her purse, not paying any attention to Callie.

"I can't find my keys." She didn't even bother looking at Callie, which did nothing to calm Callie down.

"Maybe we could, amm, … I had something I wanted to talk about."

"I had the damn keys this morning, I put them in this bag, but I can't remember. This whole thing with Yang got me so messed up"

"Erica!" Callie spoke up, finally drawing Erica's attention to her.

"What?" Erica had had a bad day and she really did not want to have to deal with Callie right now. Obviously, she was into her younger friend, but both of them were not ready yet to admit their attraction to each other. Erica had accepted that there might be more than just a friendship, but she was not willing to take the next step and risk loosing her only friend.

"I'm saying something here. Just, I wanted to say" Callie looked deep into Erica's piercing blue eyes and then let them fall to Erica's lips. Those lips, which had kissed her so softly that she just couldn't stop thinking about them. Even when she was in bed with Mark, she noticed the difference between his and her lips and just wished for these lips to kiss her again. Callie took a deep breath and all her courage together…

"I just want to do this"

… and leaned forward, taking the older woman's face in her hands and kissing her. Erica immediately returned the kiss and brought her hands up to Callie's face as well. She wanted to feel her, all of her, even though all her nerves were concentrated on her lips and how soft Callie's felt. They tore apart for a second, just to look each other in the eye and find their love for each other openly on display and then leaned in for another kiss, this time with more conviction and less hesitation. Slowly, Erica's tongue sneaked out of her mouth, circling Callie's lips and asking for entrance. Willingly, Callie opened her mouth and let Erica explore her lips and tongue. The kiss deepened and got more passionate and soon, they had to pull away to take a deep breath.