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"Does my bathing suit look okay?" Addison asked her mother, not really caring what her mother thought. The fight had obviously not blown over yet. Addison had on a blue bikini that she didn't really like, but she wanted to annoy her mother by putting on the smallest thing she owned.

"I think it's a little, you know, slutty." Madison concluded.

"And you would know slutty." Addison scoffed. She had actually planned to wear a red bikini top and red surfer shorts.

"Addison, is this ever going to ever blow over?" Madison sighed.

"Nope." Addison said simply. Madison had been trying to reason with her daughter, but it didn't change her opinion. Addison's father still hadn't called yet, but Addison was trying to not think about it. She was focusing on the party with Derek. She was really hoping that he would fall for her if she played her cards right.

"Fine. I'd much rather you wear the red bathing suit. It's really pretty on you." Madison said. "And Addison, I really want to have a good relationship with you. My stupid past shouldn't ruin us."

"Mom, listen to me. You need to give me time." Addison snapped. "Do you think a few days are enough to process this? No. I need to think this over. Dad trusted you and it's over, so can I trust you, or will you do to me what you did to him?"

"I won't cheat on you." Madison said with a slight smile, and Addison gave her a slight smile too.

"Don't make me smile. I'm mad at you." Addison said, still showing a slight smile.

"You have every right to be." Madison said. "I thought all of this would have nothing to do with you. But it does, and I really screwed up."

"I don't forgive you, but I'll work on trying?" Addison asked, and her mother beamed.

"That's all I ask. Do you need a ride to the party?"

"Yeah actually. I do. I want to-"

"You want to surprise Derek with how you look?" Madison asked, interrupting Addison, who turned red.

"No."

"Liar." Madison said, smiling at Addison.

"Shut up." Addison said with a smile. "No get out. I've got to get ready."

**

Derek arrived at the party with Mark and Meredith. They were together for about ten seconds before Mark and Meredith scurried off to talk to other people. Derek walked over to his group of friends. He wanted them to know about Addison before she arrived.

"Hey guys!" Derek said.

"Derek!" Izzie Stevens screamed when he approached.

"Hey Izzie. Hey everyone!" Derek called to the big group. Christina Yang and her date Owen Hunt followed Izzie, along with Izzie's date Alex, Callie Torres and her date Arizona Robbins, and George O'Malley who didn't have a date.

"I can't believe you're here dateless!" Owen said to Derek.

"Actually, I wanted to talk to you guys about this. I have a sort of date. She's my new neighbor and she goes to our school. Addison Montgomery."

"Oh! I have drama with her I think." Arizona said. "Red hair? Really pretty? Super shy?"

"That's her. But here's the thing, we're not here as a couple so no comments please?" Derek asked. As he asked that, everyone looked at Izzie.

"Fine." She sighed, and they all laughed.

"Speaking of dateless, George, why didn't you bring anyone? I know Callie dumped you for Arizona, but that was last year. Still not over it?" Derek asked jokingly.

"He's over it," Callie laughed. "And he has a date."

"Who?" Derek asked.

"He brought Harley in grade nine. He's just waiting for her mom to drop her off." Izzie sneered.

"Wait, Harley Johnson? You brought her?" Derek asked and George nodded. "Score!" He gave George a high-five. Everyone laughed besides Izzie.

"Don't encourage him!" Izzie said.

"Don't encourage him to date a hot, smart, funny girl? Why is that?"

"Don't mind Izzie. She thinks he's a loser for dating a ninth grader. Apparently she's forgetting that when she started dating Alex when he was in grade ten, and she was in grade nine." Christina said. Just then, Derek noticed Dr. Montgomery's car pulling up.

"That's her." Derek said, pointing to the car.

"Damn! Nice car." George said as Addison stepped out of the car, slamming the door behind him.

"Damn! Nice chick." Owen said, and everyone laughed.

"Aww, are you sure your not here with her Derek?" Izzie asked.

"We aren't, and stop before she gets here." Derek warned.

"Oh! I get it!" Callie exclaimed.

"You get what?" Derek asked

"You aren't her with this Addison girl, but you want to be." Callie said coyly.

"What? No, no. I'm not into her like that. Like, no. But No."

"Then why are you babbling like you always do when you lie?" Christina asked.

"I'm not." Derek said, turning a deep shade of red.

"You're blushing." Arizona said.

"I'm not blushing. Leave me alone." He said as Addison appeared beside him.

"You are blushing. Why?" Addison asked.

"I'm not!" He snapped, but he turned and realized he was talking to Addison.

"Oh! Hi!" He exclaimed very excitedly. Izzie and Callie looked at each other knowingly.

"Hi." Addison said.

"Let me introduce you to everyone!" Derek exclaimed again. Apparently he couldn't control the volume of his voice.

"Okay!" Addison screamed back, making everyone laugh.

"This is; Alex and his date Izzie, Owen and his date Christina, Callie and her date Arizona, and George who's date is not here yet." Derek listed. As he said each persons name they waved.

"I think Arizona is in my drama class." Addison said.

"Yeah. I am. You're really good at drama by the way." Arizona said.

"Thanks, and when you say you're Callie's date, do you really mean like, 'date'?" Addison said using air quotes.

"Yes. We're dating. The same way Alex and Izzie are dating." Callie said.

"Cool." Addison said, and Callie smiled.

"Anyways," George said. "Can you believe Mark's here with Meredith? I couldn't believe you were okay with that!"

"WHAT?!" Derek bellowed. "MARK IS HERE WITH WHOM?!"

"You didn't…? Wait, he never…? Oh shit." George said.

"He didn't ask you? You didn't already know?" Owen said, finishing George's sentence.

"NO HE DID NOT TELL ME!" Derek yelled.

"Derek calm down." Arizona said. "I bet he didn't tell you because he knew you'd react like this."

"Damn right I'm reacting like this! He's a man whore! He hits on everyone! Where the hell is he?" Derek yelled.

"He's at the fire pit with Meredith and Alicia." Christina said, pointing to Mark and Meredith. Derek ran over to them, with Addison closely on his tail, yelling for him to calm down.

"MARK!" Derek hollered.

"He found out." Meredith sighed when she looked at his face.

"You're damn right I found out! How could you?"

"Look Derek, it's not like all the other girls I've been out with. I really like Meredith." Mark said, putting his arm around Meredith.

"That's what you've said about most of the girls you've dated." Derek said. "I can't believe you!" Derek wound up to punch Mark, but Addison quickly grabbed his wrist and she pulled back as hard as she could. He stumbled backwards and he looked at Addison.

"Don't Derek." Addison said. "Don't do something you'll regret. He's your best friend."

"Fine. I won't kill him, but you should know I don't forgive either of you for going behind my back." Derek said, then he took Addison's hand and they walked away.

**

It was getting late, and the party was almost over. The DJ announced there would be one or two more songs to dance too before he left. "21 Guns" began playing and Derek pulled Addison in for a slow dance.

"I'm never going to forgive him." Derek whispered into Addison's ear.

"And you don't have to. He shouldn't have done what he did." Addison agreed "But remember, she is to blame too."

"Yeah." Derek said. "Everyone else said that I should forget about it, but not you. You always listen to me. You always give good advice." Since he was complimenting her, Addison thought it was time to take a risk. She placed her head on his shoulder while they danced.

"Derek?" She began. He realized that her head was on his shoulder, so he pulled her in very tightly.

"Yeah?" He asked.

"Do you remember when I stayed over at your house and I told you I was a late sleeper?" Addison asked.

"Yeah. I remember that night like it was yesterday."

"Well, I wasn't telling you the truth."

"What do you mean?" Derek asked. Addison was kind of confusing him.

"I'm not a late sleeper. I usually get up at like 5 or 6 in the morning, and don't think I'm crazy, but I think I slept late at your house because I felt safe there. At my own house, I don't feel wanted nor needed, you know? I felt like I was somebody at your house. I felt wanted for once." Addison said.

"Wow." Derek breathed.

"Sorry. I'm not crazy! I swear." Addison said as she turned pink with embarrassment.

"Addison?"

"Yeah?"

"I think it's my turn to confess something." Derek said. "Addison Montgomery, the first time I saw you, you were dancing in your underwear, and I though that was funny. Then I actually talked you, and to be honest, I ended up liking you a whole lot more than I intended too."

"You like me?" Addison asked.

"So much." Derek whispered in her ear, and it sent a shiver down her spine.

"I like you so much too."

"Good." He whispered.

"Derek?" Addison asked again.

"Yeah?"

"Would it be weird if I kissed you?" Addison asked hopefully. Derek paused.

"No Addison." He said happily. "It would not be weird if you kissed me. I would be very happy if you did."

"Good." She whispered before kissing him passionately on the mouth.