A.N.: I wrote this story in Portuguese on wattpad and I received some requests to translate it into English, but I don't know if my English is good enough for that. So if there's some grammatical or context mistake, I'm sorry. I hope you guys comment on what you think.

You screw my best friend and all you have to say is "He was just here"?

Mark Sloan crossed through the OR door and saw his best friend stand, surrounded by a team, immersed in front of an exposed brain. He quickly took the surgical cap from the pocket of his dark green uniform and placed it over his blond hair, so he would not risk contaminating the sterile room. He pulled one white mask near the door and put it on his face before entered the OR.

"Derek, what's that message you left with my secretary?"

"You don't have to spend the whole night with her…" Derek explained without taking his eyes off his job, "Just… Stay there until Addison comes home."

He knew it was night and at that minute he should be changing his clothes to meet his five-year-old girl, who should already be sitting next to her nanny in the hospital waiting room. But that day, everything had gone out of his control again and he'd have, once again, break the promise he had made to his daughter to take her home and spend more time with her. However, he had Mark, his best friend, and to his luck, Mark loved children much more than he loved women.

"I had plans for tonight that didn't include princesses or anything your daughter likes to do at night." Mark said.

"You're her godfather and... You know it's not hard to take care of her. You just need to give her something to eat, then put her to bed." Derek said, "I'm sure Addison will get home before she goes to bed, don't worry."

"I don't want! Ok?"

"What's the problem, Mark? Did she do something the other times you took care of her?"

"No!"

"So…?"

Mark was silent.

"She did nothing… I just thought… You have to stay with her. She's your daughter!"

"She said something to you." Derek said, taking his eyes off the patient's brain to look at his friend again, "What did she say?"

"She didn't say anything, she's sweet… It's just… You have to spend more time with your family!"

"Mark… Not now… Are you gonna take care of her?"

"Derek… I don't think so… Would you like me to find someone to replace you? I can…"

"Why don't you wanna stay with my daughter? What's wrong with her?" Derek asked.

"It's not Katie, I told you…"

"So what?!"

"It's your wife…" Mark replied mentally, feeling like an idiot while Derek looked at him curiously. He didn't usually lie to his best friend, so he had the impression that he would perceive any lie he might say. Derek kept waiting for his answer.

"Okay. I'm gonna take her home, but this is the last time I'm gonna do that." Mark said, "You have to spend more time for your family."

"Okay, Mark. I'm gonna follow your advice… Now… Go fast because she's already there."

Mark left the OR throwing the mask in the trash and punching the air for, once again, not being able to say no to his best friend. After he changed the dark green uniform of Mount Sinai Hospital, he walked to the main hall where he soon saw the dark-haired girl sitting next to a blond woman with curly hair. He walked over to her.

"Uncle Mark!"

She stood up and jumped on his arms. Mark had no children, so he was very connected to his best friend's daughter. He spun the girl in the air, then put her down.

"How are you, monkey?"

"I'm fine. I'm waiting for my daddy."

"Hum… Your dad is dressed as a super surgeon in the OR saving someone's dad's life."

"Is he gonna be late?" asked the girl.

"I'll take you home, monkey." said Mark, knowing he would disappoint her.

"Again? But daddy promised…" she said in that thin voice that made Mark's heart crushing.

"I know, monkey, but… You know how this works, don't you?" Mark asked putting some strands of hair behind her ear, "He'll go home soon and your mother too. Come on?"

With no choice, Katie nodded and said goodbye to her nanny. Mark took her in his arm, walked until his car, then drove to the brownstone where his friends had been living in Manhattan ever since they were married. That was a great house, in one of Manhattan's best-located neighborhoods. Not so far from Central Park, the best place in the entire world, according to the five-years-old sweetest girl beside him.

He opened the front door with Katie's keys, and they entered. For most people it seemed unthinkable that a five-year-old girl had all the keys of her house, but for Katie that had been a part of her life since she understood herself as a human being. Her parents were great surgeons, with almost no time at all, so it was more than normal for her to have a little more responsibility to herself than her friend from school.

Mark turned on the light and took off his coat, while Katie sat on the couch, leaving her backpack aside. She quickly took the remote control and turned on the TV.

"What do you think of ordering pizza?" Mark asked, sitting down beside her.

"Can we?"

"I don't know… Why we couldn't?"

"Mommy says it's bad for people's health to eat pizza before gonna bed. Is she wrong?"

"No, monkey. Your mom isn't wrong, but I'm sure you eat healthy food every day, so eat pizza once in a lifetime can't kill you."

Katie laughed and shook her head.

"Let's order pizza!" Mark said taking his cell phone, "Which do you prefer?"

The girl didn't answer, just kept looking sadly at her uncle, which made his heartbreak in pieces.

"Come on, monkey! I know you'd prefer your father over me, but you know… I can replace your father in this, but not in the OR."

"But he promised…"

"Yes, he'd promised for him, but not for the person who needed him. He didn't plan that. He really wanted to be with you. Put a smile on that pretty face. I'll order our pizza that will be…?"

"Cheese!"

"That!" said Mark, opening hands for a high five.

Katie remained sad watching tv while Mark was talking on the phone ordering their pizza. After he left the phone aside, he asked the girl to help bring what they needed to eat in the living room. Of course, he didn't really need her help to get two glasses and two pairs of napkins to wait for pizza, but he wanted to distract her with something.

"Uncle Mark, are you gonna work tomorrow?"

"Tomorrow is Saturday. Uncle Mark never works on Saturday, monkey. Why?" he asked.

"Can you go with me to Central Park?"

"And why don't you go with your dad and mom?"

"Because I don't know if they'll want to... I mean, I don't know if my dad will want to. If he doesn't go to the hospital, maybe he'll wanna stay home because he'll be tired."

"Let's do it this way: you insist a lot on your father. So if there's no way, I'll come to get you. Okay?!"

The girl nodded, smiling. Then she surprised Mark with a hug.

"I love you, uncle Mark."

"I love you too, monkey."

They soon heard the bell and Mark ran to the door to get the pizza. He put it in the middle of the coffee table and ate with the little girl. She laughed when Mark dirties her face with tomato sauce and grimaced at him while he photographed her with his cell phone.

Mark had a special connection with Katie since she was born. As he had always wanted to have kids, but never found the right person for that, he used to treat his best friend's daughter as his own daughter. He used to take her for a walk at least once a week, and this became more and more frequent as Derek increased his dedication to his career, running out of time for his daughter and his wife.

It did not take long for Katie to feel tired. Mark helped her with pajamas and wrapped her in the bed after kissing her forehead. The girl looked into her godfather's blue eyes and smiled, then yawned.

"You're very tired…" said Mark.

"Uncle Mark, if you wanna come home after I sleep, you can. Mommy'll arrive soon."

Mark smiled and stroked his goddaughter's black hair.

"Sleep, monkey. Uncle Mark'd never leave you alone at home."

He stood there until he realized she had fallen asleep. Then he went downstairs to clear the mess they had made in the living room. He was putting the dirty paper napkins inside the round pizza box, when he heard the key stirring from the outside to open the door, then the doorknob turning. He stopped what he was doing to see Addison and Derek coming home, but only Addison walked through the door, with a tired countenance, coming down from the heeled shoes she used wearing ever.

She set her purse and coat aside on a piece of furniture and shivered to find Mark standing in front of her, where she was supposed to expect Derek to be.

"Mark?!"

"Hi, Addie."

"Is Derek upstairs with Katie?" she asked.

"No... He hasn't arrived yet."

Addison was silent.

"But he said he was gonna bring her home today..." she explained.

"He got stuck in surgery, so I brought her home. She's sleeping."

Addison nodded, was disappointed like her daughter for her husband absence. Mark noticed and internally felt sorry for her. He hated having to testify the suffering that his best friend's family had because of his neglect.

Mark and Addison were never close friends. For her, he was always her husband's best friend who, willingly or not, she'd have to put up in her living room every weekend. That's exactly like college times. Although most of the time, Addison had seen him as a womanizer, irresponsible and insensitive; in recent months she had discovered a new side of Mark. The side that, as incredible as it seems, she wanted Derek to have.

The nearness between Mark and Addison was getting more and more embarrassing for both, who could no longer disguise their repressed desires. He comforted her when Derek didn't; he cared for Katie when Derek couldn't care; he held her hand when Derek couldn't hold anything but a scalpel.

Once a kiss happened, but they promised that moment would be forgotten forever. Since then, a giant guilty elephant has taken over the place where they were together. It wouldn't be any different now.

They were standing facing each other without knowing what to say. He regretted that she had been disappointed again with one more broken promise from her husband and she still embarrassed for wanting him to kiss her again.

"I... I'm cleaning up the mess we made." Mark said, "I'm gonna home when I'm done."

"Okay... I'm gonna take a shower..."

She blushed when she realizes that it had been too intimate.

"I mean... I'm gonna up. Close the door when you leave. I come down to lock it."

Mark nodded, and then Addison grabbed her shoes on the floor and went upstairs. As soon as she entered her room, she dropped her shoe on the floor and leaned against the door, closing her eyes. She couldn't believe Derek had broken another promise. She walked to the bathroom and then took off her clothes to go under the shower.

She stood. Her arms and shoulders relaxed, feeling the hot water run down her head. For a few minutes, she closed her eyes and took a deep breath several times trying to forget all her problems. Then she opened her eyes, picking up liquid soap to squeeze through her body, scrubbing to make sure the hospital smell would leave before she got close to her daughter. She didn't want to think about Mark at that moment, but as soon as she closed her eyes again, the memory of their first and only kiss came to her mind.

She had no reaction to feel Mark's hot breath coming closer to her face. At that point, she had no more notion if she was approaching him or if he was approaching her. She only felt his blue eyes closer and closer; then she saw his eyes closing and Mark's soft lips sucking hers, so she didn't resist and closed her eyes too.

The kiss lasted a few seconds, which could be an eternity to her while she lost herself when she felt his tongue caressing hers efficiently. His hand touched her neck with the warmth and sensibility she had not felt from Derek in a long time. Then, in an instant, she pulled away and shoved his hand away from her body. She still panting and with her lips red.

"This shouldn't have happened." she said.

"S-Sorry, Addie..."

"N-No... It was me... I'm sorry."

"It wasn't you. It was me. I'm so sorry."

Addison shook her head, still confused.

"I don't know what's going on... I just... I'm upset about Derek." she said, "He'd be here, Katie's upset with him again... I'm sorry, Mark."

"Let's just forget it happened, okay?!" he said holding her hands, trying to calm her down.

Addison took a deep breath, calming down, then realized he could calm her with his touch. Pulled her hand again.

"Come home, Mark… Please. I need to be alone."

Mark nodded, stroked her shoulder and stood up to leave. Addison breathed in relieved when she heard the door closing and threw her body against the couch to relax; she looked up at the ceiling and asked herself what was happening to her. Then she felt someone sitting next to her on the couch and quickly turned to see who it was. She panicked to think that Katie was awake and could see what had just happened between her mother and her father's best friend, but it was Amelia.

Her husband's younger sister looked at her with a look of pity, as if she could read her soul and saying "You don't have to feel guilty for anything", and that scared Addison. She remembered that she just remembered the door closing when Mark left, but she didn't remember the door opening for Amelia to enter, so she looked at her sister-in-law with curiosity.

"Addie, it's okay." Amelia said, "I'll not tell anyone."

Addison felt a shiver, and at that moment she was sure that her face was flushed. She approached her sister-in-law and hugged her. Of all her husband's four sisters, Amelia has always been her favorite since the time she was only Derek's girlfriend.

"What did I do?" the redhead asked.

"Derek wasn't here... Mark was." Amelia explained while her sister-in-law cried softly on her shoulder, "He was here... That's it."

Addison opened her eyes. She never forgave herself for that, never knew how to be like Amelia to reduce her mistakes until the point of making them insignificant. It was hard to sleep next to Derek the day before, even though he slept with his back to her from exhaustion in bed. But over time she was convinced of the insignificance of that kiss, but that was an almost impossible mission with Mark in her home whenever her husband was not.

She let the water run down just for a few seconds on her body to take what was left of the soap. Then she turned off the shower and pulled a towel to dry her hair and put on a clean, soft bathrobe. After leaving the box, she looked at her image in the mirror and took a deep breath. She left the bathroom and decided to walk to her daughter's room to kiss her good night.

As she walked down the narrow hall, with her head lowered, when she felt herself collide with something, but before she fell, she felt a strong hand gripping both her arms. She looked up and met Mark's face very close to hers.

"I'm sorry..." he said, dropping her arm after balancing her.

She can't say anything.

"I was gonna tell you I'm leaving" Mark continued, unable to take his eyes off hers.

Addison was silent, looking at him. Unwittingly she looked away and caught herself staring at his lips.

"I was gonna see Katie..."

Without her expecting, Mark pulled her by the waist and invaded her mouth with a kiss. At first, she resisted, tried to push him, but his strong arms were fastened tightly around her waist, so she relaxed and let her tongue move in tune with his.

She moaned low on Mark's lips, feeling his hand running over her shoulder, pulling her robe down. He pulled away and immediately felt excited to see her naked breasts, "It's wrong, Mark... It's wrong." he tried to say to himself, but he wasn't stronger than he imagined, never was, and instinctively, his hand tightened on one of her boobs, making her moan.

"Don't do this..." she whispered very low with her eyes closed, "To... Please..."

She opened her eyes and for a moment her fantasy came true. Derek was in front of her, touching her, bringing his face closer to hers for a kiss. Addison closed her eyes again and now pulled the shirt Mark wore, dropping it to the floor. His hands roamed her naked back as she pulled him into the bedroom, opening the button of his jeans, letting it slide down his legs. Mark hurried to take off his pants, then stepped into the room, taking what was left of her robe, leaving her completely naked.

###

It was almost 1:00 a.m. when Derek got home. The first strange thing he could tell was that the door was open. He worried that someone was coming into his house to do something with his wife and daughter, so he immediately went upstairs to check it out.

As he walked toward his room, he saw a shirt lying on the corridor floor which, he was sure, was not his. He walked a few more steps and saw a pair of men's jeans. Now he was facing the door of his room, afraid of what he might find. He took a deep breath before opening the door and meeting Mark with his body over his wife, who wrapped him with her legs open. She moaned low with her eyes closed, running her hand along his back as he touched her body as, Derek believed until then, only he had touched before.

He was completely surprised, felt his limbs anesthetized. He wanted to say something, but his mouth didn't move; he wanted to run away, but his legs didn't obey his command. He thought the best thing that could happen at that moment was that the floor would open under his feet and suck him. Then he turned his back, was about to leave the room, and he wanted to do it quietly, but he bumped into something, catching the attention of Mark and Addison, who quickly stopped in alarm.

"Derek…" Addison said.

Mark, startled, immediately got up from his best friend's bed and walked over to him, but all Derek could do was throw the jeans he'd collected from the floor on his, now, ex-best friend.

"Derek... Calm down." said Mark.

"Get out of my house!" Derek said, sending his best friend the most hateful look Mark had ever seen.

"Derek, I..."

"OUT OF MY HOME NOW!"

Addison grabbed a shirt Derek had used the day before and tossed it into the chair beside the bed, and dressed.

"Go, Mark! Get out of here." she said.

"But Addie..." Mark said holding up his pants to cover his cock.

"Go!"

"I ain't gonna let you handle this alone, I..."

"Get out of my house!" said Derek, pulling his friend by the arm.

He threw Mark out of the room, then slammed the door and turned to the wife who was sitting on the bed.

Her body was sweaty, wearing a dark shirt, which he did recognize, that fell loose over her thin body. He was very angry, as he had never felt before. Until that moment he had come home exhausted, ready to take a warm shower and throw himself in bed, but the tiredness had completely disappeared. He hoped she would say something, but no word came out of her mouth, she just stared at him, letting the tears fall from her eyes, still not knowing what she had done. He kept glaring at her until instinctively walked to their closet.

"Derek ..." she finally said something getting out of bed to check what he would do.

She took the panties off the floor and pulled on as fast as she could. She followed her husband who was taking her clothes from the closet.

"Derek, what are you doing?" she asked as he threw the many designer dresses on the bed, "Derek, talk to me!"

He couldn't say anything. He just picked up some of the dresses, gathered the ones on the bed, and carried them, taking the sheet that covered the bed.

"Derek, what are you doing?!" she asked following him, "We have to talk about this! You have to give me a chance to explain... What are you doing? What are you doing with my clothes, Derek?!"

She followed him down the hall.

"It was one time! I know that's what people say. I know what always gets said, but it's…" she was following him down the stairs, "I don't even know how it happened. I don't know what I was thinking! He was just… He was just here… He was just here…"

"You screw my best friend and all you can say is 'He was just here'?" Derek asked, opening the door.

"Derek!" she exclaimed as she watched him throw her clothes away from the house.

"GET OUT!"

"NO!"

"GET OUT!" he ordered pointing to the open door.

"No. I'm not going. We're gonna just talk about this." said Addison, sitting down on one of the stairs.

"GET OUT OF MY HOME NOW!"

"No! We're gonna discuss this. No, no! I'm holding my ground… WE DON'T QUIT! We have to work…"

"Get out…"

He pulled her by the arm.

"NO! What are you doing?"

"Get out!"

"What...? Derek!"

He threw her out of their home and slammed the door.

"No!" said Addison, pressing her hands against the door.

It was raining outside, and he listened to her, mingled with the sound of raindrops falling to the ground, his wife's moan crying banging lightly on the door.

"No... Derek, please..."

He could see her silhouette standing, trembling a little.

"Please..." she cried again.

He turned his back and rolled his eyes from both sides of the living room.

"Please..." she continued to cry, knocking on the door, "Please, Derek..."

"What's going on?" he asked himself before taking a deep breath.

"Please..."

He turned and opened the door to meet Addison with a completely miserable appearance. Her clothes were thrown in front of the house.

"Sorry..." she said between tears coming in again, "I'm sorry... You have to give me a chance." she said approaching him, "You have to give me a chance to show how sorry I am..."

He let her hug him and, as much as he tried, couldn't reciprocate the hug. Then he took her by the arms and pulled her away, much more when he saw that she was trying to kiss him. He reached out to close the door, ran his hand through his hair, then removed the ring from his finger and placed it in her hands.

"I gonna go and you stay... I'll get my clothes in the morning." he said.

"No..." she moaned, "We can survive. We can survive this." she argued, trying to make him understand, "We're Addison&Derek... We can survive this."

"I can't look at you… I just… I look at you and I feel nauseous..."

Derek tried, more than once, to put out the words that were stuck in his throat, but it hurt his chest to say that.

"We... We... We're not Addison&Derek anymore."

Addison felt the shivers of what she had just heard.

"If you go now, we are not gonna get through this. If you go now… We don't have a chance. We don't have a chance? If you go now…"

She still didn't believe that a slip was putting her whole life in collapse. Derek shook his head, walked to the door, and left. Addison bent down on the floor crying. In a few minutes, she heard the door open again and surprised herself when Derek entered with her clothes. He threw everything near the door and went upstairs.

"Der..." she followed him hopefully.

She watched as he entered their daughter's bedroom and took the unconscious child in his arms. Then she realized what was happening.

"Derek... What do you think you're doing?!" she asked as he took their daughter's backpack, which probably had only the material she took to stay with miss Gomez after school.

Katie shifted in her father's arms and opened her eyes to try to understand what was happening. She just saw the sketch of her mother crying behind her father, wearing only a dark shirt, while Derek led her down the hall.

"Derek... You aren't gonna take her, are you listening?" said Addison, following him now by the ladder, "Derek!"

"Mom..." the girl moaned, still sleepy.

"Give her to me, Derek." Addison said, holding her daughter's hand, "You're not gonna take my daughter!"

Katie woke up and look above her father's shoulders.

"Shii... Go back to sleep, sweetheart." Derek said, pressing his daughter's face into his shoulder as they made their way to the door.

"No, Derek…" Addison said, following him down the wet stairs.

He put their daughter in the backseat of his car and slammed the door. The girl had awakened now but seemed confused with everything. Addison grabbed him by the sleeve of his coat, which he had not had time to pull off when he got home and tried to stop him from leaving.

"You'll not take her... Please, Derek. Leave her with me" she pleaded, crying.

"Mommy!" Katie said, banging on the glass of the car as Derek tried to get his wife to drop his arm.

"She doesn't wanna go, Derek! Please!"

He jerked a last tug on his arm, causing Addison's fingers to free his overcoat. Then he got into the car and turned the key to turn on.

"Daddy, what's going on?" the scary girl asked.

She could see a tear trickling down her father's face as her mother beat in despair at the window she was sitting on. The car left the place and Derek accelerated.

"No! NO! Katie! KATIIIIIIIIIIIE!" Addison ran behind the car.

But it was faster and then it turned the corner and disappeared from her sight.

"KATIEEEEEEEEEEEEEEE!"