Disclaimer: I don't own anything.

Thanks so much for all of the reviews! Sorry if it jumps forward in time so much now. I'll try to mark it to keep track.

April…

Addison ran into Meredith in the hallway. It was after 5.

"Meredith, will you do me a huge favor?"

"Sure."

"Can you pick up the girls from school and watch them until I get home?" Meredith wasn't sure how to answer. She thought it was going to be a work thing.

"Okay."

"It really won't be hard. You can do it."

"I haven't watched them by myself before."

"Kaitlyn is fifteen. It's really Lily and Kaitlyn can help with Lily."

"Okay."

"You can eat anything in the kitchen. There's a lasagna already made in the refrigerator if you want to cook that. Just put it in the oven. Lily probably won't last until that's cooked but you can just give her a banana or something that will hold her over." Addison handed her a key. "Here's the key." Izzie and George were standing behind her waiting for her to go home. "They can go with you and have dinner if you want. I have one delivery and then I'll be home. She should deliver within the half hour I'm waiting for the page."

"Okay."

"Thank you so much."

"Sure." Addison's pager went off.

"There we go. I won't be too long."

Two hours later….Addison went walked into the house.

"Oh thank god." Addison smiled.

"Where they bad?"

"No. Just vomiting all over the place."

"Both?"

"Lily. And you'd think that three doctors would be able to take care of it, but no, it's so much different than being in the hospital."

"Where is she?"

"Meredith has her in the bathroom." Addison put her bag and coat on the chair close to her. Meredith came out of the bathroom carrying Lily. Izzie came out of the kitchen at the same time.

"Kitchen's clean." She saw Addison. "Oh hi." Lily held her arms out to Addison. Addison took her.

"She's vomited a few times. We cleaned her up, but didn't give her a bath and her dirty clothes are just by the washing machine."

"Don't worry about it." She kissed Lily's head. "You have a fever." Lily laid her head on Addison's shoulder.

"Yeah. I think you got me sick."

"I don't know about that."

"You were throwing up."

"That was for a different reason."

"Am I going to have a baby too?" Addison cringed. Meredith was the first to comment.

"You're pregnant?"

"Yes…Kaitlyn!" Kaitlyn came upstairs. "Take Lily either downstairs or up to my room and put something on tv for her." Addison put Lily down and Kaitlyn took her out of the room. "Yes. I'm pregnant."

"Does Derek know?"

"Only Mark and the girls know. You can't tell Derek."

"He's going to find out."

"I want to tell him and I want to do it in person."

"He's in New York for a while."

"I know. I talk to him, his sister, and his mother."

"I didn't…"

"I was married to Derek for eleven years and with him longer. His family became my family. I'm still close to most of his sisters and his parents. I know what's going on. Derek's been keeping me updated."

"It's not going to be a secret much longer." Addison looked at him. "You're starting to show."

"I know. I'm going to tell the chief soon, but until I do, (looking at the three of them) this has to remain a secret." Izzie was excited about it.

"When are you due?"

"Middle of October." Addison could see George counting on his fingers) "I'm a little over 14 weeks pregnant."

"Keeping it a secret for that long in that hospital is pretty impressive."

"I would like it to stay that way for two more days when I have a meeting with the chief."

"I really think Derek should know."

"If I tell you why he doesn't know yet, it stays between us." Meredith knodded. "Derek and I wanted kids from the beginning. At the end of our internships we decided to start trying for a baby. We tried and tried and tried. Month after month we were disappointed. It went on like that on and off for three years. We decided to stop trying because it was putting a strain on us and our relationship. We started try again a year later and it was a repeat before. About a year before he moved out here we decided to stop all together, if it happened by chance then great, but if it didn't than it wasn't happening. That's what led to us growing apart. If he finds out that his best friend got me pregnant without even trying to, he's going to be really hurt. I'm just looking for the perfect way to tell him. I really don't want to do this to him. It's going to be much better for him to hear from me though, don't you think?" Really she was also afraid that if she told Derek and he thought it was his, he would leave Meredith for the baby.

"Okay." Mark came in.

"Hey babe." He kissed Addison.

"Hi." Kaitlyn yelled downstairs.

"Addie!" Addison went to the bottom of the stairs.

"What?"

"Lily just threw up on your bed."

"Great." (to Kaitlyn) "I'll be up in one minute. Take her into the bathroom."

"We will go."

"Thanks for watching the girls."

"No problem." The three of them left. Addison followed Mark upstairs.

"Well, there's goes any good relationship Meredith and I had."

"Why?"

"Lily accidentally told them that I'm pregnant and Meredith is mad that I haven't told Derek."

"She'll get over it, but you do have to tell him." Addison and Mark walked into their room.

"I know." Kaitlyn was talking to Lily from the bathroom.

"Lean over the toilet."

"Get the bedding into the washer. I'll go relieve Kaitlyn." Addison walked into the bathroom and Kaitlyn walked out. Lily was crying. "It's okay. Here let's take your yucky clothes off and get you in the tub." Addison pealed the clothes off while Lily was still crying. She started filling the tub and put Lily in. Mark peaked into the bathroom.

"How should I wash these?"

"Did she get the comforter too?"

"No."

"Put it all in the washer and a capful of laundry detergent. Wash it in warm water."

"Okay." He went to do laundry and Addison bathed Lily and then put clean pajamas on her. Addison took Lily downstairs and put her on the couch with a movie. Addison found Mark in the kitchen eating leftover lasagna.

"Smells good."

"Did you eat any?"

"No I came home and then they found out about the baby, then you came home."

"I'll make you a plate." He did and sat it in front of her.

"Thanks." She started eating. "Will you check on Lily? We don't want her vomiting all over the living room."

"Yeah." He left and came back. "She's sleeping for now."

"We'll have to make sure she gets some fluids when she wakes up." Mark sat down next to her.

"We're like an old boring married couple." Addison laughed.

"You used to make fun of me and Derek for that."

"The only thing we've talked about this evening is laundry, kids, and vomit."

"I'm eating."

"Since when are you squeamish?"

"Since I got pregnant with your child and vomited my guts every morning, noon, and night for the past 9 weeks."

"When does that part end?"

"Soon hopefully. I'll start getting less and less sick now."

May….

Kaitlyn touched Addison's swollen belly.

"Hi baby." Addison looked up and saw Derek standing in the room.

"That was fast."

"Derek, you don't get to do this."

"What?"

"Sweetheart, can Derek and I have a minute alone?"

"Yeah." She left the room.

"You're engaged to Meredith. As soon as I got pregnant, I knew that we were going to have issues."

"Why with Mark?"

"I didn't plan it, it happened. You don't have a right to have a problem with this. I want a baby and you know that."

"Why didn't you tell me?"

"You were in New York, for a few months. What was I supposed to call you up and say hey Derek I'm pregnant with Mark's child. We're divorced."

"I talked to you while I was in New York."

"I know. I didn't want to hurt you. You wanted a child so badly and that didn't happen for us. I wanted to tell you about the baby, but I thought it would be better in person."

"No need to tell anymore."

"I had it all planned out, but you were gone so long."

"I know. I'm sorry. It's just, I like being friends with you. You're so easy to talk to."

"You're jealous."

"I guess so. I always had big plans for the time when you would get pregnant. I thought it would be mine."

"I want it to be yours."

"Wait. When are you due?"

"October." He counted. She knew what was coming next.

"Any chance it is mine?"

"Derek."

"Add. I deserve to know."

"Yes. A very, very small chance. I didn't want you to know. You're engaged. This baby is going to be Mark's. I'm not ruining two families over this. Do you want to end your relationship with Meredith?"

"No."

"Okay. So it's much, much more likely it's Marks. And that's how it's going to stay."

"Do I get to be Uncle Derek?" Addison smiled.

"Of course. No child's life is complete without Uncle Derek."

"Are you getting married?" They sat on the couch.

"I don't know if Mark wants to. I don't know if I want to. I think that if we do it, it won't be right away. We have enough going on."

"A baby is a lot."

"Plus we are adjusting to living together. And Kaitlyn and Lily are adjusting to all of us living together and the baby. I'm adjusting to being their stepmother."

"Oh all of the was already happening. You have been more of their mother than Mark has been their father since they came out here."

"What about you? Any plans for kids?"

"I want a baby. We've talked about it a little. I don't know if Meredith's ready yet."

"You're not getting any younger."

"Thanks Addison."

"No problem." He put his hand on her belly.

"Your mommy's being mean to me. Yes she is. Are Kaitlyn and Lily excited for their new sibling?"

"Yes. Lily tells everyone it's her baby. They're ready for the idea of the baby, not sure that they're ready for the actual baby yet."

"You'll all get there."

"I know. We have five months."

"Yeah. How does it feel?"

"When I'm not sick, wonderful."

"You're glowing." Addison smiled. He moved his hand up and down over her belly. "Your stomach feels so different."

"Yeah. And it's also a little weird that I have a friend who can say that."

"In case you forgot, we go way back, my friend." He smiled and she matched it. Then he looked sad.

"What?"

"I'm not going to get to watch your belly grow or be there for midnight cravings or for the ultrasounds or the first time you see the baby." She took his hands in hers.

" I know. I know you wanted this more than anything in the world. I did too. I wanted to have your baby and I wanted you to do all of those things. You were, are, the perfect guy, a great uncle, and you'll make a wonderful father someday. I would love for you to be the father of my child. We changed. We grew apart. It didn't work for us. Don't you think I'd rather have you over Mark?"

"You would?"

"Yes I would. The Derek that I married would be higher on the list than number one. You weren't that guy when we got divorced, but you're getting there. I've seen more of the old you today than in a very long time. Mark isn't the family guy. He isn't the one who stays committed forever. He's the fun one night guy. You are the family guy."

"You know you can call me if you need something."

"That's sweet. Honestly. I appreciate it. But you have Meredith now. This isn't your baby. You can be part of the baby's life as an uncle or friend if you plan on sticking around. We just have to be careful that we don't get wrapped up in the dream we once shared so we don't hurt everyone around us."

"I know. It's just amazing. I kind of wish I could trade places with Mark."

"Derek." He looked right at her. "Can we stop this?"

"What?"

"This. What you are doing? Can we just be friends enjoying barbeque this evening starting now?"

"Alright." He put his hand on her belly. "I still am fascinated with this. It appeared out of no where."

"I know. It's fun. It just seems a little surreal that I'm going to have a baby in a few months."