A/N: Sorry, it took me so long! Finals came and being in college requires a lot of time not sleeping and lesser time doing random shenanigans, then I had to catch up with my sleep. But I'm back now, until June, I hope, for weekly updates.

A/N: All grammar and spelling mistakes are solely on me, unfortunately. Feedback of any sort would be highly appreciated (NO, REALLY, REVIEWS WILL BE HIGHLY GLORIFIED). Constructive criticisms are appreciated too, as long as they're not rude.

Disclaimer: Chill, mate. I ain't claiming any of ABC's things.

"Oh, God. He can't know about this. He can't." Meredith started rambling and Derek seemed like he didn't hear a word as he tried to digest the information that had just exploded in front of them.

"Meredith."

"What?!" She spat at him, for the second time today.

"Calm down."

"Seriously? Seriously?" Struck with complete shock and disbelief, the memories of her brother's over protectiveness flood her. "You might have known Mark as a friend but he's a whole lot different person when it comes to me."

A memory suddenly flashed inside his head. "Oh, I think I do." He gulped.

*****FLASHBACK*****

"Mark?" Derek tried to yell out over the thumping music inside his and Mark's apartment. His shift was just over and all he wants is rest and he would come home to this—a party with what seems like half of the junior staff of the hospital?

But the music suddenly stopped and all he heard were footsteps and grunts and the sound of something hard meeting with skin. Like fist colliding with skin over and over again. Goddammit.

Derek hurriedly pushed past the commotion of people forming inside his room. "Excuse me!" He yelled and finally finding a red-angry Mark decking a guy, who looks like their fellow intern David, straddling his abdomen while alternately punching him in the face with both his bleeding fists, David trying to speak in the almost non-existent gaps between each punch. Derek finally snapped out of his shock and moved towards the pair and tried to yell his bestfriend back into consciousness. "Mark! Mark!"

Mark stopped his fist midair and stared deadly into the eyes of the man under him. "Don't you dare speak of my sister again. You're not worthy of even thinking about her." He dropped a punch in a flex of his hand, seemingly towards David, only to make his fist hit the floor an inch away from the culprit's face and stood up swiftly, grabbed the picture from a broken frame on the floor, and walked out of the room.

So that was it. That was what made Mark act like he's crazy. If there's anything he loves in the world more than any other thing, it would be his sister. Speaking about her in a disrespectful manner is like begging for a beat up.

"Party's over!" Derek announced, pretending not to care about their colleague bleeding on the floor and barely able to stand up even with the help of their other colleagues.

When all the people are gone, Derek looked for Mark and found him in the rooftop, gulping down beer in bottles. "Hey," he said, stepping in beside him, but didn't get any response as the taller man kept his gaze at the city before him. "You okay?"

"My sister." Mark replied hoarsely.

Derek turned to him, "Is she okay?"

"Yeah. It's just... He disrespected her."

"After tonight, I don't think anyone would, ever again." He said conclusively.

"Hope so." Mark smiled weakly. He certainly hopes so.

*****END OF FLASHBACK*****

"Something happened in New York when we were interns." Derek said, dumbfounded still at the newly-learned information and all the memories related to it. "He almost killed the guy because he made a snarky comment on a graduation photo of you!"

"Okay." Meredith said decidedly, "We're not going to tell him. So whatever happened the other night, we're gonna forget about it and we're all just gonna coexist peacefully."

Derek was about to protest when a nurse went through the door of the stairwell. "Dr. Grey."

"Dr. Shepherd, the patient's parents are waiting for you."

meet me at the basement. am freakn out Meredith typed quickly on her phone and flipped it shut as she rummaged her way out of the surgical floor and into the stairwell, trying to escape being trapped in the elevator with her new neurosurgical attending slash most recent one-night stand.

dis bettr b juicy cus I am beyond bored ryt now Cristina texted back and made her own way downstairs. But not before being called aloud by who else than her bestfriend's brother and their boss, Mark. She wasn't really that close to him except for times when they need to talk or discuss about Mer and Mer's situation or just how she's been. He's been checking up on his sister through Cristina when Mer's phone is unreachable or when she simply does not answer. Except for the frequent introductions, they haven't really talked about anything else except Meredith. Not that there's anything to talk about with him except her, really. "Yeah?" Cris answered as she turned around and started walking towards Mark. And jackpot! Who's the red bimbo beside him?

"Is Mer around? I haven't really seen him all day yet." He asked, keeping an arm around his companion.

Cristina eyed the redhead from head to toe and back again. Is this what the freaking out is about? "Mmm, no, not really. She's in hiding. Something about freaking out and needing me to freak out to. Either it has something to do with you," she narrowed her eyes on the two in front of her, "or it's something that only people with vaginas understand. Either way, I'm not telling you where she is."

Mark stood stiffly at his spot, his arm rigid around Addison. Damn! Did Mer seriously find out already? I knew I can't keep it that long from her. But this soon? Really?! "Okay, can you, ugh… Can you not tell her about this? I'm still figuring out how to tell her about Addison and I, and I really don't know how."

Cristina looked at the woman who has been staring at them intently, "Yeah, whatever." She waved a hand at them and walked away.

"Uh… Thank you?" Mark yelled after the intern.

"That's Cristina?" Addison asked as they proceeded to walk on the hallway and towards the Chief's office. "She doesn't seem like she's as bitchy as your stories."

"Oh, I hope you don't ever get to talk to her when she's having a bad day. She'll make you cry so much, you'd want to pee in your pants." He whispered as he opened the door for her and waited for her to step in before doing so himself.

The Chief was facing the wall and talking on the phone. He was obviously in argument with whoever was on the other end. "I'm just saying that you should give them the benefit of the doubt! They're—" He swiveled his chair and saw the couple in front of him. "I will have to call you back." With that, he hung up.

"Little Addie?!" He walked forward with a shocked smile.

Growing up as the daughter of The Captain, who is one of the best neurologists in the world, she got to know a lot of people from all medical fields. Richard Webber has been a close friend of his dad for since she could remember. "Uncle Richard." Addison greeted and went in for a hug and a peck on his cheek.

"The last time I saw you, you were, what, 16?" He sighed after releasing each other.

Addison laughed. "And the last time I saw you, you don't have these many wrinkles!"

The Chief look behind Addison and Mark politely stepped forward, offering his right hand for a shake.

"Mark."

"Good to see you, Chief." He grinned and stood beside his girlfriend.

"Sit down." Gesturing at the seats in front of him, he walked behind his desk to sit at his black leather chair. "So, how's the hospital looking for you?"

"It's really great." Addison commented with wide eyes. "I've been to the NICU."

Cristina slumped down on the gurney beside Meredith and huffed. "This is not what I pictured my first day to be. They don't allow us anywhere near any bloody bloody guts. All we do are run labs, work orders… Hell, they don't even allow us to stitch patients in the ER without supervision!" She huffed, annoyed, but looked at Meredith when she didn't get the usual response from her. "Cat got your tongue? What's wrong with you?"

"I just found out something I never would've wanted to happen." Meredith stared blankly at the wall.

Cristina's mouth, opened slightly agape. Of course she knows already. This hospital's a gossip place. She stood up in front of her and walked towards the vending machine to get some chips. "It's not like you're not his favorite girl anymore or whatever. He just wants to have some fun." With one hand on her hip, waiting for the bag of chips to drop, she added. "Perhaps, him becoming a reformed man, I wonder how long that would last."

Mer's head snapped into her bestfriend's direction with a confused look on her face. "Who are you talking about?"

Picking up the chips, Cristina arose with the same confused look on her face. "Who are you talking about?"

"My one night stand. Are you talking about Mark and his girlfriend?"

"Uhhh… Yeah." Cristina trailed, opening the bag of chips and stuffing a mouthful in her mouth. Oops.

"You met her? She's here?" Meredith fired sequentially. When Cristina nodded, Mer's head flew back in frustration. "This is all too much for one day." She groaned. "I haven't even met her, I don't even know her name."

The Asian sat down beside Mer again. "She looks bitchy."

"Bitchier than us?"

"Yeah."

"Wow."

Cristina steered the conversation back to Mer. "Who were you talking about, anyway?"

The blonde's eyes narrowed into thin slits and bowed down, then looked at the brunette under her lashes. "I slept with our boss." She whispered.

"YOU WHAT?!" Cristina all but screamed.