Mark was awaken when a loud, shrilling noise filled the room.

He noticed Lexie was still asleep on his chest and he was very hesitant to wake her.

Instead, he inched his hand towards the nightstand to grab his ringing cell.

Derek S. is calling...

it read in bold letters. He slowly got up, careful not to wake Lexie in the process, and made his way in the bathroom closing the door behind him.

"Hello?"

"Mark, where the hell are you?!"

"Relax Shep. I drove Lexie home last night and ended up crashing here."

"I specifically told you-"

"And nothing happened, I swear."

"I find that very hard to believe seeing as you went home with her last night."

Mark sighed before continuing.

"Is there a reason you called, or...?"

"Yes, there's a reason! I wake up this morning next to this amazing women who's going crazy about where her sister is. And then, I go downstairs hoping to share my fantastic sex story with my best friend and he isn't there!"

Mark couldn't help but laugh. "Well, where's Meredith now?"

"In the bathroom. She's getting dressed and then I'm taking her home."

"Her mom and dad might still be downstairs. I'm not sure if they left, so you wanna be careful."

"Alright. Thanks."

Hanging up the phone, he made his way back into the bedroom.

Lexie had already gotten up because she was now sprawled out on the bed.

Even with bed-head and all, Mark still thought she was absolutely beautiful.

"Who was that?" she asked him in her groggy voice, which he found extremely hot.

"Derek. He's letting Meredith wash-up or whatever, and then he's bringing her back."

She nodded her head. "You hungry?"

"Yeah, but what about your parents?"

"Oh shit." she jumped off her bed, fixed her hair and starting wiping off the previous nights' make-up. Going into the closet, she pulled over a hoodie similar to his and made her way to the door. "Stay here." she told him.

After a few minutes, she re-entered the room.

"You can come downstairs, they aren't home."

As he climbed the steps and went into the kitchen, he sat on a bar stool.

"Where'd your mom them go?"

Lexie shrugged. "Mm, not sure. She just left a note saying they were going out for the day and to not wait up for them tonight."

"Your parents just let you guys do whatever? And leave you back in this huge house...all alone?" Mark's eyes widened.

"Pretty much. Mer and I know how to take care of ourselves so it's really no big deal. We haven't ever gave them a reason not to trust us."

Lexie was heating up the waffle iron and began to unwrap the bacon.

"Need any help?" he asked. He didn't want her doing it by herself, he'd feel bad.

"If you want, you can start making the eggs. I'm allergic..but you can cook enough for you, Mer, and Derek."

After a good 15 minutes, Meredith walked through the door looking refreshed as ever.

Careful to keep her voice down, she whispered. "Where's mom and dad?"

"Out. Won't be home 'til late tonight, said not to wait up. Now bring Derek in before the food gets cold."

As if on cue, Derek walked in with a huge smile when he noticed Mark and Lexie cooking.

"Who knew Mark Sloan could make eggs?"

He chuckled. "Shut up before I make you starve."

...

After finishing breakfast and having Meredith and Derek do the dishes, the four of them were propped up on the couch, watching some Lifetime Movie Network film the girls insisted on. Derek's arm was lazily hanging over Merediths, while Lexie was snuggled up to Mark. Neither of them thought anything of it.

"Are we just gonna watch movies all day or are we actually gonna do something?" Derek was the one to break the silence.

Meredith glanced up at him before turning her eyes back to the screen. "Well, what do you wanna do? It's pouring rain outside."

"We could always go bowling."

Marks' face scrunched up. "Bowling during the day? Kinda lame."

"Oh shut up. Lexie, would you consider bowling?"

"It's kinda early..don't y'think? I mean we could always go tonight."

"Yes! That's sounds like a plan. Hm..6ish?"

Everyone nodded their heads in agreement.

...

Once it hit 4:00, Meredith practically kicked the guys out when she mentioned they needed to get ready, and reminded Derek to pick them up at a certain time.

After both getting in and starting up the car, Derek began reversing.

"So, what exactly happened between you and Little Grey last night?"

Mark shook his head. "Nothing, I'm telling you the truth. I drove her home, we watched a movie, and fell asleep. Well not before her dad came up to the room because she was laughing so loud." He smiled at the memory.

"Her dad knew you were there?"

"No. She lied and said her and Meredith were watching a movie."

Derek nodded his head. "Good..that's good. They're something else those sisters, aren't they?"

"They sure are."

They both smiled at the thought of Meredith and Lexie, but Derek noticed Marks' smile was extra big.

"Do you...d-do you like her?"

Almost immediately his head snapped up.

"I mean, she's cool and all but I don't think-"

"You can tell me the truth, Sloan. I won't judge."

He sighed exasperatedly.

"She's beautiful, y'know? And last night while we were laying next to each other, it felt so normal. Like she belonged there...and-and I mean honestly Shep, not once last night did I ever think of getting in her pants. We were already having so much of our own fun, she made me forget about it. But she's young..and I'm not sure if she or I are ready for a relationship."

"You know, I was talking to Meredith on the way here and she mentioned you and Lexie. She said that she thinks you'd be good for each other, even if it's just for the time being. And who cares if she's young? You have the maturity of a horny 15 year old..you need young." Derek chuckled, and so did Mark.

He knew his best friend was right but..Lexie didn't know him. Not manwhore him at least.

"She doesn't know about Addison..."

"And she doesn't need to." Derek interrupted. "The past is the past, Mark. Don't let your mistakes interfere with what you want. You obviously like her, give it a chance. But if you hurt her and Meredith leaves me, I'll kill you."

...

"What do you mean nothing happened last night?!"

"I mean nothing happened last night." Lexie replied nonchalantly. Meredith had been telling her all morning how fantastic the sex with Derek was and now she was prying into her and Mark's business.

"Lex, he's insanely hot! And you had a chance to hit that!"

"Well guess what Mer, I take sex extremely serious! I may not be into one night stands and hookups, but it's only because I'm saving myself. I don't see how one night full of orgasms is fulfilling to someones' needs."

Meredith just sighed in defeat. "I understand what you're trying to say Lexie, but at the same time, live a little y'know?"

She was about to walk away when Lexie's voice stopped her.

"Do you think he likes me?"

Meredith turned on her foot and sat back down next to her sister.

"If a man can bring you home in the wee hours of the night and not wanna fuck, he feels something. Trust me."

And with that, she went to get ready leaving Lexie to her thoughts.

...

A good hour passed before the sisters heard a familiar horn beeping outside.

Lexie was wearing skin tight black skinny jeans with a simple grey v-neck, while Meredith was dressed in black tights and a red blouse.

Mark had on jeans, a black shirt, and his leather jacket, while Derek was wearing similar pants and a white tee.

"Hey, you guys look great!" Shepherd greeted.

"Thanks." they both smiled.

Mark couldn't help how naturally gorgeous Lexie looked. Even when she wasn't trying, she was still absolutely breath-taking.

He shot her a smile and squeezed her hand before looking out towards the window.

...

After getting their shoes and being assigned lanes, the couples walked towards the crowd.

"You and Meredith on one lane, Lexie and I on the other?" Mark asked, putting on his shoes.

Derek nodded. "Let's make a deal, guys! The couple who loses buys dinner."

"Deal." Lexie nodded, shaking his hand to make it official.

She hadn't even flinched when he said the word couple, and neither did Mark.

...

After an ass-whooping of five games, it was obvious that Mark and Lexie won.

"Yes!" she screamed, and as if it were completely normal, she wrapped her arms around Marks' neck and pulled him into a deep kiss.

He was shocked at first, but eventually felt himself slowly sink into her.

After pulling away and her arms still wrapped around him, she took a step back.

"O-oh m-my G-God, I-I'm s-sorry! I-I d-didn't-"

But she was cut off with Mark slamming his lips into hers against, and snaking his arms around her waist to pull her closer. She let out a little moan at the immediate contact.

The kiss started to deepen but when air began a necessity, they pulled apart for a second time.

Completely unaware, they forgot they weren't alone.

Looking at both her sister and Derek, she was nervous. That is, until she saw Meredith pull out a 20 dollar bill and slap in into Derek's hand.

"Dammit, I lost. But anyway, OOOHH LEXIE HAS A BOYFRIEND!" she did a little dance before smiling at her younger sibling.

"Way to go, man." Derek told Mark, as he slapped a hand on his back.

"Mer, he's not my boyfriend..."

Mark was surprised. "I'm not?"

Lexie was now embarrassed. "I-I mean, you never asked and we never talked about being it.."

"Lexie Grey?" he smiled at her.

"Yes?"

"Will you be my girlfriend?"

Feeling the air caught in her throat again, she froze for a second.

Was he really asking her?

Was this really happening?

And then she snapped back into reality knowing this is what she wanted.

Before pulling him in for yet another tongue-battling kiss, she answered his question. "Yes, Mark Sloan. I'll be your girlfriend."

"WAIT!" Lexie pulled away from him again, causing Mark to groan loudly. "You two bet on when we'd get together?!"

Her sister and Derek looked at the new-couple guilty, which caused both Lexie and Mark to erupt in laughter.


A/N : Okay so I know it was kinda a lot but for some odd reason, the DocManager would not let me upload Chapter 2 all at once. Keep in mind that I'm doing everything off my iPhone. AND if you are still waiting for an update of my other fic "I'll Stand By You" be patient...it's acomin' ;) thanks for reading!