A/N: I am so sorry that I haven't updated, but school started and I've been pre-occupied, again so sorry. This chapter, you'll find out who put the panties on the board, I bet you'll never guess who put them there. The O'Malley's will come in the next chapter. Please R & R..

Summary: Mark and Izzie try to hide their relationship. It's been over one year since our favorite interns became residents. Burke is no longer in Seattle. Christina and Alex are roommates in a two bedroom apartment (even though they still don't really get along), which is quite nice. George is at Mercy West. Callie went with George. She still has no idea about what happened with Izzie and George, which isn't important now. Derek is chief. Since Christina and Alex are roommates, leaving Meredith and Izzie to be roommates. Meredith and Derek are back to being a couple, and quite happy. The drama now is about the secrecy of Mark and Izzie's relationship.

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It was a few hours since Alex and Lexie's love confession, everyone was back to work. Addison was watching their surgeries through the gallery and making small talk with some of them when they weren't with a patient or in surgery. She missed Seattle, but she figured it was best she had left when she did.

Izzie closed up a patient's chart and handed it to a nurse. She then started to walk to a hallway, she was, until she heard Mark and Addison's voices. She was about to walk to them when she heard what they were talking about, so she just moved out of sight around the corner, of course she could still hear them, that was the point, just not be seen.

"What do you think would of happened if I never left?" Addison asked thoughtfully and curiously.

Mark shrugged. "Who knows? Maybe you and Karev would have been together."

"Why do you assume everything I ask is about Alex?" Addison asked even though it does.

Mark sighed. "Because you slept with him before you left."

"What?" Addison asked. He knew? How did he know?

"That's why I said I broke the pact. I saw you and Alex come out of the on call room, it was obvious what you two did." Mark said letting out another sigh.

"Oh my gosh, Mark, I'm-"

Mark cuts her off. "It's in the past, everything's in the past."

Addison nodded with guilt. "It is, but still- Wait, how about when you said you slept with someone…"

"I lied." Mark said with a slight shrug.

"You lied so I wouldn't feel the guilt, that is so unlike you."

Mark nodded. "It is, and that really opened my eyes to become a better person than I was. A better Mark, a reformed man."

"You succeeded."

Izzie didn't really want to know what was coming next. Finding out that he was still in love with Addison and not her, she didn't want to know. She turned in the other direction from the hallway and started to wake towards an on call room.

"Izzie's a lucky woman." Addison said truthfully.

"I'm a lucky man." He said with a smile.

"You really do love her don't you?"

"I do. I don't know what I'd do if I didn't have her in my life."

Addison smiled. "I woman who has finally tamed Mark Sloan, never thought I'd see the day."

Mark chuckled. "Well, you did."

"Yes, and it surprises the hell out of me." Addison said with a small laugh.

Lexie looked and saw Izzie walk into an on call room. It didn't look like she was waiting to have another round of on call room sex with Mark. She wasn't sure what to think. She decided to investigate. Lexie walked from where she was walking from. She walked around the corner and saw Addison and Mark. She raised an eyebrow and started to walk towards them. "Dr. Sloan!" She called out.

Mark looked at Lexie. "Dr. Grey." He said with a nod.

Lexie looked at him closely. "You haven't talked to Izzie in the last few minutes have you?"

Mark furrowed his eyebrows. "No, why?"

"Not sure, but I am sure that you should go to the on call room, like, now." She looked at his questioning and concerned face. "Don't ask, just do it, now!"

"Okay." Mark looked at Addison. "So, I'll talk to you tonight?"

Addison gave a nod. "Yes, and with your lady."

Mark nodded, glanced at Lexie, then started walking down the hall and around the corner Izzie had went before.

Addison looked at Lexie. "Is Izzie okay?"

Lexie shrugged. "Not completely sure, she walked from the corner to the on call room, and then I saw you both here and basically I'm confused about it all."

Addison glanced down the hallway, then looked back at Lexie.

Mark stopped walking when he came to his destination. He turned the doorknob and opened the door. He didn't look at Izzie completely until he closed the door behind him. He looked at her. She was looking at him for a moment before looking down at her knees. She was sitting on top of the bottom bunk, her knees up to her chest, and her hand wrapped her arms around them. "Iz, are you okay?" He asked concerned, walking over to the bottom bunk and sitting next to her.

Izzie glanced in Mark's direction, then looked forward. "I'm fine." She looked down at her knees.

"No you're not." He put one hand on her knee and rubbed his thumb over it. "Talk to me." He said softly.

"It's nothing really, it's stupid." She said shaking her head slightly avoiding his gaze and the feeling of his hand on her knee.

"Sure it is." He said sarcastically with a slight roll of his eyes. "What ever it is, stupid or not, it's bothering you, talk to me."

Izzie sighed. "I heard you and Addison talking. I came here after I heard her say you succeeded at becoming a better man, I just-"

"Thought that I'd come to the realization that I love her and not you?" He finished for her.

Izzie avoided his eyes and looked toward the ground and nodded a little.

"Izzie..." He put the tips of his fingers under her chin and lifted it up so she was forced to meet his gaze. "I love you, in a way that I've never loved anyone, not even Addison. You're it for me, and nothing is going to change that. Got it?"

Izzie looked in his eyes, he was telling the truth, every wor. She gave him a slight smile and nodded.

Mark smiled. "Good." He gave her a peck on her lips.

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That night, Addison was sitting on a stool at the bar of Joe's laughing along with Joe at what he said about something.

"Good to know everything here at Seattle has calmed down, well almost." Addison said her laughing fading as she sipped her beer.

Joe chuckled. "Almost."

Mark and Izzie walked through the bar door. Mark's arm around her waist. They both spotted Addison sitting at the bar and walked over.

Joe knew about Mark and Izzie, but he's Joe, he knows everything that happens at Seattle Grace.

Addison looked over her shoulder and smiled at the couple. "There's the happy couple!"

Izzie smiled at that.

Mark smiled and sat next to Addison. Izzie sitting on the other side of him.

"What can I get you two?" Joe asked. "The regulars?" Most of the time when they came to the bar, Mark and Izzie ordered the same drink, scotch on the rocks for Mark, and just a beer for Izzie. It was simple, so it was and easy regular. He watched as they both nodded and went to get their drinks.

Izzie was about to say something when he cell phone rang. She opened her purse and flipped open her cell phone she had removed from it. "Hello?"

"I'm sorry. I didn't know they were yours I swear!"

"What?-"

"The panties, I saw your face. I had no idea they were yours when I found them!"

"Wait. Olivia?"

"Yeah, and again, I am so sorry!"

"How did you get my number?"

"I'm a nurse."

"I know, but why did you-"

Olivia hung up.

Izzie looked at her phone with a shocked face. "Olivia put my panties on the board."

"What? Syph nurse?" Mark asked clearly shocked himself.

"That's her."

"But why?" Addison asked.

"I have no idea, but she kept saying sorry, like that could change anything." Izzie said closing her phone and putting it back into her purse.

"At least it's out of the way." Addison said trying to look on the bright side of it.

"I guess." Izzie said drinking some of her beer that Joe had brought her.

Addison tried to steer the conversation to something else. How they got together, that's something they could talk about. "How did you two get together?"

Mark and Izzie looked at each other.

"We actually started as friends." Izzie said looking back at Addison.

"Really? Now explain to me how that happened."

Mark glanced at Addison, then looked at Izzie. "You want to start or should I?"

"I will." Izzie smiled at Mark. She looked at Addison. "From the very beginning?"

Addison nodded. "The very beginning."

"Well…"

They continued to discuss how they got together. Later on the conversation turned to Addison. She told them about the Private Practice and who she was working with. This continued until Addison left to get some sleep before she had to leave early the next day to the airport.

Mark and Izzie were walking to Mark's car.

"Tonight went well." Izzie commented.

Mark nodded. "It did." He put his hand in hers and intertwined their fingers, which Izzie smiled. He brought her knuckles up to his lips and kissed them. "I love you."

Izzie smiled. "I love you too."