Author's Note: Standard disclaimers apply. I do not own the rights to this show. All characters and related entities belong to the owners/creators of Grey's Anatomy.

I don't write a lot, and this is my first fan fic. Let me know if it's worth my time and energy to keep going here, OK? Thanks!

"I can't find the damn keys. I know I put them in this bag this morning, but this whole thing with Yang…"

"Erica, I'm saying something."

Callie's interruption takes Erica by surprise and she's about to playfully continue with her rant when she sees the fear and uncertainty in Callie's face. Suddenly Erica stops talking and her expression softens. The need in Callie's face is unmistakable. It's a reflection of the same need that Erica had been seeing on her own face in the mirror every day since she and Callie became friends.

It's the need that Erica tried to channel to Callie when they were in the cafeteria yesterday joking about threesomes and she laid her head on Callie's gorgeous shoulder.

It's the need that Erica just about screamed out loud when she kissed Callie in the elevator.

It's the need she knew they both felt today as they "played a game of Twister" over Cement Boy.

"I just wanted to say…" Callie stops herself. For a brief moment, Erica was sure that they would both lose their nerve, and that brief second almost causes her heart to stop beating.

"I just wanted to say…" Callie stops herself again but only to draw in a deep breath and gaze longingly at Erica's lips. Then it happened. Callie kissed her. It was the single most romantic feeling Erica had ever experienced. All of the weeks of wondering if Callie had been feeling the same way she had been feeling had suddenly been worth this very moment.

The kiss was short but sweet, and suddenly Erica remembered where her keys were. As the two friends gazed lovingly into one another's eyes, Erica slid her hand into her coat pocket and pulled out her keys. She jingled them next to Callie's face and murmured "I found my keys" as she leaned in for another kiss.

This time Callie pulled away and gave a sly smile. "Are you going to drive me home with those keys?"

It was Erica's turn to give her famous sly grin. "I'm going to take you home. I'm going to take you back to my home. The thought of you going back to Yang's place tonight is just nightmarish. Come home with me."

Callie didn't need any encouragement. She slid her arm around Erica's waist and the two half walked; half ran to Erica's car.

Callie had been to Erica's place before but it had never been this big a deal for her. Usually they just watched movies and drank wine. Usually the nights ended too soon and Callie headed back to Yang's apartment to sleep on the couch, utterly alone and lonely. There had been so many nights lately when Callie had gone back to Yang's apartment thinking that it didn't feel like home. Erica's place felt like home. Erica's place had felt like home long before Addison had made her think of Erica as more than just her best friend. The pieces were starting to fall into place, and Callie wondered if she had known all along that she would end up with Erica somehow.

Erica parked in her driveway, but didn't turn off the car. She looked over at Callie and whispered "Once we go in there, we can never go back to the way things were before".

Callie understood and just nodded. Erica turned off the car and the two got out. As they walked up the flagstone path to Erica's front door, Callie took Erica's hand and held it. It felt right to do that. It wasn't even something she had to think about- she took Erica's hand in her own the same way she would take her next breath or blink her eyes.

Once in the house, Erica dropped her bag by the coffee table, neatly placed her shoes by the front door and hung up her coat on a rack near the stairs. She looked up the stairs and back at Callie. Callie knew that they both wanted to run up the stairs to her bedroom and do very naughty things, but instead, Callie sat down on the sofa. She motioned to Erica to sit next to her. Both were filled with an awkward uneasiness that they had never felt before. Finally, Callie took Erica's hand and started to speak.

"I've wanted to kiss you for ages, but didn't know if you felt the same way about me that I felt about you. And I was too afraid of losing your friendship if I kissed you and you didn't feel the same way about me. You know what finally made me do it? Cement Boy!"

"What?" Erica giggled. Callie's voice was starting to calm her down considerably. Erica wasn't even sure what the two of them should do next, but just sitting here, across from her best friend (and the best kisser she'd ever met) was starting to help her calm down.

Erica's giggle calmed Callie too. "Erica doesn't laugh enough," Callie thought. "I want to see her laugh more often!"

"Yes, Cement Boy. Well, actually his girlfriend, Lola. I realized tonight after I gave her advice about not caring about what other people think and just being honest, that I was really talking about myself and how I feel about you."

Erica smiled. "This is pretty uncharted territory for me. I've never fallen in love with a woman before."

"You love me?" Callie was grinning from ear to ear. It was the best news she'd heard in weeks. It wasn't just a physical attraction for Erica, and that made Callie overflow with joy, because it wasn't just a lust thing for her either. "I love you too. You don't know how much I've wanted to tell you that! When we were at Joe's and I told you what Addison had said, something inside of me made me stop short. I was going to tell you right then and there that I really thought we should be a couple, because when we're together we're happy like a couple… but the fear of losing my best friend was too much."

Erica moved closer to Callie and put her arms around her. Callie was still grinning from ear to ear, and it made Erica laugh that beautiful laugh again. Then she kissed Callie again, but with a little more urgency this time.

The urgency did not go unnoticed by Callie. Callie kissed Erica back, and slowly ran her fingers through Erica's soft, blond hair. Erica leaned towards Callie, so that Callie would have to lean back on to the couch. Soon the two were lost in their kiss, with Erica leaning over Callie and letting her hands roam over Callie's body. Callie moaned as Erica gently ran a hand over her breast, the nipple becoming instantly sensitive and erect.

Callie followed suit and raised one hand to Erica's collar bone, tracing her fingers down to her shoulder before wrapping her arms tightly around Erica's neck, and deepening the kiss. With her other hand she worked her way up to Erica's thigh and started to rub, gently, up and down. With each motion she got closer and closer to Erica's crotch. Soon, neither could take it anymore.

Erica pulled away. "I-" she stammered. "I'm afraid of not doing this right."

Callie gave her another sly grin. "You were doing a great job before you stopped! This is going to be awkward for us. I know that, and you know that. It's not like either one of us has ever done this with another woman before. But we both learned how to do it with men, and there's no reason we can't learn to please one another. Also, there's no reason to rush things. As much as I would love to get into those pants of yours, I can definitely wait if that's what you want."

Erica smiled as she remembered her first time with a man. Well, a boy actually. They were both teenagers, parked in a car behind a local church. Yes, a church. The sex was awkward and painful. The next time it got better and better again after that. Yes, this was going to be awkward. Suddenly she didn't care, because it was Callie that she was going to learn to do this with. Callie. Her best friend, who knew her better and loved her more than anyone else in the world. Erica suddenly realized she had nothing to worry about.

Callie interrupted Erica's reverie. "You're thinking about your first time with a guy, right?"

Erica was thrilled- Callie had such a fantastic way of reading her mind. "Yes. It wasn't great. It was awkward and painful for me. I wasn't ready but felt like I had to prove that I was. I felt pressured and regretted it from the start. It did get better after that though."

"It was the same for me, too Erica. So let's act like teenagers. Let's make out until our lips are numb. Sex can wait. We'll wait until we're more sure of ourselves. We'll wait until it's the right time. We'll wait until-"

Callie was unable to finish her sentence because Erica had placed her hands on Callie's cheeks and pulled her towards her. The two did exactly like Callie said. They made out until their lips were numb. They explored each other's bodies through their clothes, but they didn't make love. That would come soon enough.