Disclaimer: I don't own it.

Kaitlyn opened the front door to find Izzie standing there.

"You just like us so much you had to come back twelve hours after you left?" Kaitlyn said.

"I don't know if I like you, but I like this little girl." Izzie replied as she tickled Grace. "I came to see Addison."

"Who knows what she's up to."

"I really, really need to talk to her." Izzie begged.

"I guess." Kaitlyn said letting Izzie in. "Come upstairs. She's still in bed."

"Hey, I don't want to walk in on anything." Izzie warned her.

"I've already been in there. Grace and I just came downstairs because Grace didn't want to lay in bed any longer." Kaitlyn said as they walked up the stairs.

"If you're sure." Izzie said as they approated Addison and Derek's room.

"See they don't leave the door open if they don't want to be walked in on." Kaitlyn poked her head in. "Izzie needs to talk to you." Derek pulled away from Addison, they had been kissing. They both looked over. Kaitlyn went back downstairs with Grace.

"I really need to talk to you about something." Izzie said to Addison.

"Okay."

"Can we do this alone?" Izzie asked looking at Derek.

"Are you kicking me out of my own bed?" Derek said.

"Yes." Izzie replied.

"Do I not get a say in this?" He asked giving her a hard time when really he was about to get up anyway.

"No."

"Fine." He kissed Addison and left. Izzie sat on the bed.

"What's up?" Addison asked her.

"I think I'm falling for Mark. That's really what I need advice about." She said.

"Last night we weren't even sure you were going to tell him about the baby." Addison said.

"Well I did. I went to see him after I left here. We talked all night. Like I think I slept for maybe an hour." Izzie informed her.

"What did he say?" Addison asked.

"He's excited. He was already talking about getting a new place so he has room for the girls and the baby. He wants to start dating. He wants to give this baby a chance to have what Grace has. He says he sees what you and Derek have and he wants that and he thinks that I'm that person for him."

"He likes you." Addison said smiling.

"Mark doesn't have a good track record with relationships. He cheated on you a lot." Izzie sighed.

"You don't know Mark." Addison told her.

"I know enough." Izzie said.

"You really don't. I think it's time we told you about Elizabeth."

"Who's Elizabeth?" Izzie asked.

"Elizabeth and I met when we were in ninth grade. We very quickly became inseparable. We did everything together. We could read each others minds. We went to college together. We lived together. We didn't do anything without consulting the other. We were incredibly close. We were like sisters. I met Derek in college and with Derek came Mark, of course. You wouldn't know it now, but until five years ago Mark and Derek were very much the male counterpart of Elizabeth and I. When Derek and I were just hanging out, Elizabeth would come with me and Mark would come with Derek. Mark and Elizabeth were kind of forced to become friends. After a while they were doing things together without me and Derek. In our last year of college, Elizabeth got pregnant. Nine months later, she gave birth to a beautiful baby girl, Kaitlyn." Addison explained.

"Mark dated your friend? That's kind of cool. Your best friend and Derek's best friend were together." Izzie commented.

"It was. During the pregnancy, Mark freaked out and left her, but came around a few months before Kaitlyn was born. After that, they were inseparable, practically married. They lived together. They did well with Kaitlyn, brought her to us frequently to help. None of us really knew what we were doing in the beginning with a baby. We were only twenty two, just out of college. We got things figured out. A baby did not in any way interfere with the relationships we all had. It only made things better. When Kaitlyn was six, Elizabeth was diagnosed with cervical cancer. It was pretty far advanced. She fought it, but about a year later, she succumbed to the cancer. It devastated all of us. Mark had trouble even being around Kaitlyn for a while. I think that he was afraid of losing someone again, he started his pattern with women that you know him to have. All of us got wrapped up in work and our careers took off. Between work, Kaitlyn, and my relationship with Derek, we didn't have time for anything else. There wasn't time to bring anyone into our unique family. Mark is ready for a relationship. He has been for a while, he just chose the wrong person to try with. Mark and I just can't have that kind of relationship, but he can have that with someone else. As much as I love Elizabeth, we all love Elizabeth, it's been a while, I think the memory is less and less painful for him so he can open up to another person. Elizabeth would want him to be happy." Addison finished telling Izzie about their past.

"I had no idea." Izzie was surprised to hear about Kaitlyn's mom.

"Makes you see a better side of him, doesn't it?" Izzie nodded.

"So I should give him a chance?" Izzie asked.

"If you want to. Tell him that you want to be exclusive and if he wants to be with you he will honor that. He really will. He did with me until the end when we didn't see each other much." Addison advised as Derek came back in the room.

"Sorry to interrupt you ladies." He said.

"It's okay." Izzie reassured him.

"Where are your wedding rings? I want to get them cleaned so you can wear them again." Derek asked Addison. Addison bit her lip with wide eyes.

"Umm." She said.

"What?" Derek asked.

"They're kind of at the bottom of the bay." Addison told him cringing. Derek wanted to laugh but he held it in. He came closer to her.

"You threw the wedding rings that I gave you on the happiest day of our lives to the bottom of the bay?" He teased.

"Well, I was kind of mad at you and didn't think that I would ever need them again. Plus you were bugging me about wearing them. Besides you think it's funny. You can't hide anything from me." Addison said smiling. Derek laughed.

"It is very funny." He kissed her on the lips. "I'll take care of it. At least if you think we need them again."

"Yes. It's my favorite piece of jewelry." Addison told him. He left again.

"What about Lily's mom?" Izzie asked Addison. "I just assumed they had the same mom."

"That's another story for another time. I'm trying to convince you that Mark can have a relationship."

"Where they not in a relationship?"

"Lily's mom was caught up in the wrong crowd. Mark would have had a relationship with her, but believe she was not good for Mark. Or Lily." Addison left Izzie wondering about Lily's mom. She had never heard anything about her before.

"What am I going to tell Mark?" Izzie asked.

"You better decide now, he's coming to get the girls." Addison warned her.

" Here? Maybe I should go."

"Izzie, you know what you want. Just tell him."

"Yeah. I do." Izzie sighed.

"Help me get the girls ready." Addison said as she stood up. They went into the girls rooms and helped them make sure they had everything they needed. Derek called up the stairs that Mark was here. They all made their way down. Lily ran to him.

"Daddy!" She said hugging him.

"Good morning Lily." He hugged her back. "Are you girls ready to go?"

"Yup!" Lily said excited. Izzie walked in the room.

"Izzie." Mark said.

"Can we talk?" Izzie asked.

"Last night wasn't enough for you?" Marked asked joking.

"I know what I want." Izzie said.

"Let's go outside." Izzie followed Mark outside. "Before you say anything, I will be a part of this baby's life with or without you. He deserves to have two parents. I'm going to do it right this time. And I really like you. I hope you give me a chance."

"I want to give you a chance. I really really like you." Izzie said.

"We're having a baby." He said with his hand on Izzie's belly. She put her hand on his.

"We are." Izzie smiled.