Thanks to McMuffin for beta-ing! :)

Disclaimer- If I owned, this would've happened.

Addison stands up from her seat, "This is completely unnecessary Richard."

Derek's head shoots up from the table. "I agree with Addison."

Addison turns to look at him confused, "Really?"

"I don't want to spend a week in the same hotel as you, probably the same floor, and I don't even want to think about this one but... possibly even the same room. So yes, really."

"Funny, Derek."

"Children, let the man speak."

"Shove it, Mark."

Mark grins.

Addison's face turns red, "No, no. I did not mean it like that."

"You did last night."

"MARK!"

Richard shuts his eyes in disgust, "I think that's enough Dr. Sloan. Honestly I'm surprised you guys aren't thrilled about this."

"Why on earth would we be thrilled about this?" Addison practically screams.

"It's Vegas."

"But it's Vegas with them." Addison looks at Derek and Mark, receiving a wink from Mark and a glare from Derek.

"Need I remind you that you three used to be best friends?"

Derek laughs, "Used to."

"Laugh all you want, you know it was really all your fault."

"Really, Mark, do you seriously want to go there?"

"You'll leave tomorrow." And with that Richard walks out of the room.

"Wow." Addison says as she approaches the others, "light packers."

Mark coughs, "High maintenance."

"Fuck off."

"Oh, Addison's using her colorful vocabulary today."

"I'm not in the mood."

"You better get in the mood."

"What?"

Mark waves his plane ticket in front of her, "Guess who's sitting next to you on the plane?"

"Kill me."

"You know, we could make this plane ride very interesting."

"Oh really?"

"There's a bathroom."

"Dream on, Mark."

"I will."

"Hey buddy."

"You are not, in any way what so ever, my buddy."

"Love you too, Derek!"

"You know, he's never going to forgive you."

Mark turns to face Addison, "I know."

"Doctor Sloan, Doctor Shepherd, Doctor Montgomery?"

"Yes?"

"I'm Eric, and I'll be showing you your room."

Derek screams, "Room?"

"Yes, room."

"As in only one?"

"Who's the brain surgeon here?"

"Fuck off, Addison."

"Wow, see what eleven years of marriage does to you."

"No, see what cheating on your husband with his best friend does to you?"

"You were never there, Derek. You have no right."

"Stay out of it, Mark." Derek and Addison both say at the same time.

Eric clears his throat. Addison bites her lip, "Sorry."

"You'll be on the twenty-third floor, room 2317." Eric tells them as the step into the elevator, "And here are your keys."

"Thank you."

Once the elevator gets to the twenty-third floor and the three of them step out Eric continues, "Oh and Richard wanted me to let you know that there actually is no conference and he just did this so you could sort out your obvious… issues. Good day now." He finishes right before the doors close, bringing him back down to the lobby.

"You've got to be kidding me."

"I doubt he's kidding you, Addison."

"Derek I swear to god if you don't shut up I'll--"

"You'll what? Cheat on me?"

Addison stops, "This Ends now, okay? I can't stay here for a week if you two are going to constantly be giving me this shit. So please, can this just end?"

"No."

"No."

"Perfect."

"Oh my god!" Addison screams when she opens the door to their suite, "It's huge."

"And happy Addison appears."

Addison smiles, "Richard is god."

"That's not what you said last--"

"Mark." Derek and Addison both warn.

"Fine, whatever."

"You two are seriously still sleeping together?"

"No." Addison says harshly.

"Okay."

"Shit!" Addison yells from the other room.

"What?"

"There are only two beds, and no couch."

Mark grins, "No. No there is no way I'm sleeping in the same bed as you."

"Oh come on."

"No."

"Why?"

"Because you have no idea how to keep your hands to yourself."

"Has that ever been a problem before?"

"No…Damnit."

Derek looks away, "I'm pretty sure this is the weirdest experience of my life."

"Agreed."

Silence.

Addison's eyes grow big.

"What? What is it?"

"I bet the room gets charged right to Richard's credit card."

"And?"

"And there's near an unlimited supply of alcohol on those shelves over there."

"And suddenly this trip is improving."

"It's three a.m. Go to sleep, Addison."

"I can't."

"You never can."

"It's gotten worse, lately."

Mark turns to face her, "I'm sorry."

"I'm an idiot."

"No, I am."

"No."

"Yes."

"No."

"Yes."

And when somewhat sane/sober Addison reappears she says, "I miss this."

Mark smiles, "Yeah, me too."

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