Izzie sat there on the cold stone bench outside the hospital looking around. Today had been rough for her. From the moment she woke up she had a feeling that today would be life changing, she just didn't know how yet. The day had started with a fight with Alex, but that was nothing new. The marriage just didn't seem to be working anymore. She sighed and looked around, the sky had taken on a grey tinge and she knew it would start raining soon. Not that that was anything new. It was always raining in Seattle. She ran a hand through her hair as she sat there wondering how it all went wrong. When had her marriage fallen apart? There were many moments that came to mind, but none seemed severe enough to warrant the end of a ten year marriage.

After Denny, Izzie never thought she would move on. Least of all with Alex, but he was there and one day it just happened. One day it became routine and neither of them wanted to end it. She needed a replacement, he needed to feel loved. It was a win, win situation. But now finally it didn't seem to be working anymore. Izzie feared being alone, it was something she hadn't dealt with since Denny had died. She always had someone, and now here she was getting ready to ask for a divorce.

Yes, it was Izzie who was going to bring an end to it all. Alex was growing more and more distant by the day, and she wasn't making things any better. She wanted kids, he didn't, so she picked a fight about it constantly. It was what she did best. But now she wanted to stop it, she was sick of the fighting, sick of the stress. Between work and home life she was going insane. She heard the rumble of the thunder seconds before the rain began to fall. She pulled the clip out of her hair and shook it free before tilting her head back and laughing. She slowly rose to her feet and looked around. There was no one near by so she didn't feel stupid indulging her childish side. Again she tilted back her head but this time proceeded to stick her arms out and spin in circles. It had been years since she had truly enjoyed the rain and it was time for that to change.

"Now what's a well known surgeon such as yourself doing out here playing in the rain?" A low masculine voice murmured out.

Izzie froze in place and turned to see Mark Sloan standing there. They had become close friends over the years, even if it was awkward in the beginning. Mark used to hit on her constantly, and she turned him down each and every time. It was not that she wasn't interested, she had always been interested. But Dr. Sloan had a reputation of being a bit of a man whore. She offered a half smile as she took a step closer to him. He didn't hesitate to walk up to her and wrap her in his arms.

"Mmmm Dr. McSteamy. It has been some time since you graced Seattle Grace with your presence." She said before pulling away and brushing her lips against his cheek. The rain was still falling but it didn't bother her. She loved standing out here with him. It brought up many memories. The last time they had met like this he was in the middle of divorcing Addison. After everything he sacrificed for her she still hurt him in the end. He had only strayed once and that was when he was giving her a way out. But once they were married Mark never strayed. And the only woman he continued to flirt with was Izzie Karev. It was Izzie who held him as he cried over the woman he had given everything up for. She still didn't understand why Addison did what she did.

"Well I heard things were rough." He shrugged his shoulders slightly, "I figured you might need a friend." The rain was still falling but neither of them noticed or cared much. The weather was suitable for the mood of the moment.

"Thank you." She said before taking his hand and leading him to the bench she had previously occupied. "It just isn't working anymore. I am done, I am asking him for a divorce." Izzie said before looking up at him. She was going to continue but then she realized something. "Addison doesn't know you are here does she?"

"No." He sighed and rubbed his eyes, "I didn't tell her. I don't want to tell her, not yet." The prospect of facing his ex wife terrified him. At one point he had hoped that they would be able to become friends. But that didn't seem likely anymore. It had taken long enough for him and Derek to become friends that still surprised him to that day. "A divorce huh? Finally come to your senses and realize you can't live without me?" He asked with a smirk.

"Oh yes, because you are just that good." She replied after lightly smacking him on the arm. Izzie let out a laugh and leaned forward slightly. Mark sat there studying her. Even when ending a ten year marriage she still looked beautiful and put together. He couldn't think of a moment when she didn't look put together, correction there was one that he could recall, the day he had married Addison. Mark remembered the way Izzie had looked at him from her place at Addison's side. Izzie had been the maid of honor and looked even more beautiful than Addison had. Though Mark would never admit that out loud.

There was always something about Izzie that drew Mark in. She was fiery and passionate and at the same time a warm hearted woman. She was beautiful inside as well as out. He stared for a moment longer before shaking his head and looking away. He was lost in the moment and for a second realized that there was now a chance for him to get a chance with her. Once upon a time Addison had been the woman of his dreams, but that ship had sailed a long time ago. He wasn't quite sure when he had fallen in love with Izzie but he had and now he was stuck waiting for her.

"Babe you know I am." He said with a wink as he stood up and offered her his hand. "Dinner tonight?"

"I can't I have to give Alex the papers." She said with a slight shrug as she nervously bit down on her lower lip. "Are you going to be in town long?"

"As long as you need me." He whispered before hugging her again. "But right now I need sleep. Jet lag is a bitch."

Izzie reached into her purse and pulled out her house keys and handed them over to Mark. "I am going to talk to Alex here, and soon. You can go nap at my place then we are off to find a hotel. I cant stay at my house tonight. Not until me and Alex figure out what we are going to do with it."

Mark just nodded and took the keys. "I will see you when you get home then." He said with a smile before walking away. Izzie stood there staring after him. Grateful, not for the first time, that she had him in her life. No one else would be able to bring her mood up the way he did. But she avoided trying to think of a reason why he had that power over her.

Izzie took a deep breath and shook her head. She was soaking wet and still had a few hours left until the day was over. She opened the door and went back in with a small smile on her face for the nurses who were staring at her like she needed to be committed. She twisted her hair back and secured the clip in place before heading to the locker room. She was about to open the door when she heard giggling coming from the other side. She wanted to ignore it and was going to, but then she heard Alex's voice.

"Babe not so loud. We don't want her to find out." He said clearly, even though his voice was quieted by the door between them.

"Izzie won't realize a thing. She hasn't noticed for the past three years has she?" Izzie recognized the voice immediately. And her heart stopped for a second. Sure she was going to divorce him but that didn't mean it didn't hurt to find out he was cheating, and had been for years.

"But we need to be careful here at work. People talk."

"Babe it's kind of exciting. Makes me want to do you right here and now."

With that Izzie walked into the room. She didn't attempt to mask her entrance. At first the two were no where to be seen but she turned the corner to find Alex with his pants down and Addison pressed up against the wall her legs locked around his waist.

"Alex Karev what in the hell do you think you are doing?" She shouted looking at them. Alex turned and quickly pulled up his pants, but it was too late Izzie realized she had literally caught him in the act. "I can't believe this. Not once but twice!!" She shouted again not caring who heard her at this point.

"Babe, let me explain it was only this one time I swear."

"You lying bastard I already heard her say three years" Izzie walked up to Alex and punched him. Feeling extreme satisfaction as blood began pouring out of his nose. Then she turned to Addison. "You are a whore and always will be. I can not believe this. He is the reason you left Mark? You never even deserved him." Izzie slapped her across the face and walked out of the room. Not stopping until she was back outside of the hospital standing in the pouring rain. She gulped in the air like she was starving as she leaned against the side of the building tears streaming down her face. She felt like she was falling apart. But in the midst of it all she began to laugh. He had just given her everything on a silver platter. According to there pre-nup if one of them cheated the other got everything. She laughed again and shook her head, finally she would have to money to open up her own practice, if she so chose. Taking out her cell she dialed Preston's number. He was her boss yes, but he was also a close friend.

"Burke."

"Preston, I need the rest of the day off. I just caught Alex with Addison." She said with a sob. It hurt a lot to find your husband in someone else's arms. But more than anything she felt stupid. She should have realized that something was happening. But she didn't and now it was too late.

"Go home and get some rest. I will keep him here if I can."

"Thank's Preston. I owe you one."

"No you don't. You deserve better Isobel."

With that she hung the phone up before she could start crying again. The next phone call was to her lawyer saying she needed to papers sent over to Alex tonight at the hospital. She had them drawn up awhile ago. But she wanted to see if things got any better between the two of them. But nothing changed, things only got worse. And now it was actually over. It was for the best she knew that, but still it was a decade of her life. And now in a split second it all fell apart.