Mark tried his best to put the tiny dress on his day old daughter as Callie giggled at his efforts. She was sitting indian style in her hospital bed, dressed the other little girl with ease. Mark turned his head so and glared at her. Callie bit her lip to stop her laughing.

"What the hell is so funny?" he asked, trying to figure out how to get the dress over Maddie's tiny head.

"You. You've never dressed a baby before have you?" she asked, lifting a fully dressed Annie into her arms.

"No and for the record I've never changed a diaper either."

"Want me to take over?"

"No! I have to learn to do this. She just won't stop wiggling! How the hell am I supposed to dress her if she keeps moving around?"

"You do it quickly before you piss her off."

Mark sighed and tried again to pull the dress over her head. It wouldn't fit over.

"It won't fit!" he yelled, causing Callie to laugh again. She looked down at Annie and grinned.

"You're daddy is one funny guy." She said, placing a kiss on her head. She looked up at mark and smiled as he struggled to pull the dress over her head.

"Mark stop you're going to hurt her. It's not going to fit until you undo the buttons on the back." She explained.

"What!? They have buttons? God these things are confusing." He said, pulling the dress away. He made sure she was safely on his lap and unbuttoned the back of the dress. He easily slid it over her head then scratched his head on how he was going to get her little arms in the sleeves.

"Just put your hand under the dress and pull them through."

"I'll hurt her."

"No you won't their bodies are very flexible Mark." She explained. Mark did as she said and barely put any strength behind the pulling. Maddie pulled her little arms back against her chest, causing her father to groan.

"You're going to have to pull harder than that."

"Don't you think I know that now?" he asked, getting annoyed.

"Oh good god, hand her here."

"No! I have to be able to dress my own child!"

"And at the rate you're going, she'll be walking by the time you get that dress on her."

"Ugh! Fine you do it!" he said, getting up, the dress hanging around Maddie's neck. Callie took her in her free arm as Mark gently picked up Annie. Callie laid Maddie on the bed and easily dressed her.

"See. It's not rocket science." She claimed, picking her up and kissing her. Mark rolled his eyes and kissed the girl in his arms.

"Ok, so now how the hell are we going to tell them apart?" he asked, glancing from Maddie to Annie.

"Oh ye of little faith. Easy each of them have distinct characteristics that set them apart from each other."

"They do?"

"Yes, I noticed them when I was watching the nurses wash them this morning. Maddie has a small birthmark on her back. It's a light brown and is shaped like a half moon. It's very adorable. Annie here has a birthmark right under her left arm. It's on her chest near her under arm. It's a darker brown and has it's own free form." She explained.

"Oh, you're going to have to write that down. I'll never remember it." He said, shrugging his shoulders.

"At least you're being honest." She explained.

"Give her to me and get their car seats. Don't worry the bases are already in the car, and all you have to do is lock them in place. You won't have to figure out how to get them in." She explained. Mark gave her a sigh of thanks and placed Annie in her mother's arms. Mark kissed each of his girls and then left to retrieve the carriers that were sitting in the resident's lounge. They had been a gift from the residents to the both of them.

Callie looked down at her girls and smiled at them.

"Looks, like it's just us girl for a bit. Ok, here's the deal. Mommy may look like the strong one but to be honest, I have no clue what I'm doing and that scares me to death. But just so you know, we're going to try our best to be good parents to you two. You both deserve everything." She explained. She looked up as applause erupted from the doorway.

"Very nice speech Iphie! It was so touching, I think I have to go barf now." Cristina explained, walking into the room.

"Shut up Teenie!" she said, poking her tongue out at her. Cristina sat down on the edge of the bed and demanded one of the twins. Callie handed her Annie and smiled as Cristina bonded with the little girl.

"You know for someone who plays the 'I care for no one' card, you sure do crumble at the site of your godchildren." Callie said raising her eyebrow.

"My reputation was ruined thanks to you!"

"Me what did I do?"

"You gave birth to the most amazing girls I've ever seen and turned me into a blubbering idiot when you named me a godmother."

"Oh well I can take that title away if you don't want it to ruin your butch like attitude."

"The hell you will! You've given it to me and can't take it back."

"Ok, ok fine. I guess you can keep it." Callie said, grinning. Cristina reached over and slapped her on the arm.

"Hello, holding an infant!"

"Dude, you can't use my goddaughter as a shield. That's just not cool!"

"Then don't slap me and I won't"

"I've earned the right to slap you."

"Oh and how so?"

"One you're the best friend, that gives me right enough. Two I'm dating your brother, who is amazing in everyway. I mean God the things he can do with his…"

"Stop right there! Eww! There are little ears and he's my brother! I'll tell you what Bailey told me; I can't handle your sex life ever! Especially since your sex life includes my brother!"

"Fine, you're no fun. How am I supposed to spill my secrets if you won't let me?"

"You should have thought about that before you bedded my brother!"

"Excuse me I didn't bed him. It was the other way around. And he's just too damn cute for me to resist."

"Ok, again eww! Stop Talking, just stop talking." She said, putting her hand up. Cristina sighed.

"Whatever!"

"So wanna tell me how this ruined your reputation. Because if I recall you only cried in here when I made you godmother."

"Nope, wrong. I cried again. Stupid female hormones!"

"When?"

"This morning while I was on call. I came up to check on you. When I came in you were in bed with the sperm donor, sleeping the night away. I left and went to the nursery to see how my girls were doing."

"You're girls?"

"Shut up. Talking here."

"Then continue."

"Ok. When I got there the twins were in the front row. They are kind of hard to miss anyway, since they are the most gorgeous babies in there. The nurse in there saw my standing out there and motioned for me to come in. I went in and she recognized me as friend and asked if I'd like to hold them Of course I said yes and the moment she placed them in my arms, the damn water works started. It would have been fine if my stupid interns weren't standing outside the nursery smiling like idiots at me!" she explained, though no once taking her eyes away from Annie.

"Aww, you care. You know I love you right?" Callie said, grinning.

"Yeah, so I've been told."

"So what did you do to the snot nosed interns?"

"Well once I gave the twins back I marched out there and yelled at them. I told them if they had time to stand around then they had time to do charts. They weren't happy with me but I made it perfectly clear that I wasn't changed."

"God Teenie!"

"Damn right I am."

"Ok, I didn't mean it like that."

"As Bailey said, I'm not the god but I am their god!"

"What is it with us and the Bailey quotes today?"

"Hell who knows but she's a great person."

"Word! That woman is hell on two feet. She may be little but damn she can make a person piss themselves with one look.'

"Don't I know it! Have you gotten the Bailey stare down?"

"Oh yeah. She taught it to me to use on Shepherd when that girl with Vaters and severe scoliosis came in."

"Ah, it's scary as hell."

"Yup, and look the sperm donor has arrived." Callie said, smiling as Mark entered, carrying the car seats.

"Sperm donor?" he asked raising an eyebrow.

"It's was all Cristina!" Callie said, pointing at her.

"Thanks for the back up, Iphie!" Cristina replied.

"Hey I sleep with him. I can't have him pissed at me."

"Whatever!"

"Ok, ok ladies stop the little girl fight in front of my girls." He said as he plucked Maddie from Callie's arms. He successfully placed her in a carrier and did the same with Annie.

"Ok, how did you do that? 30 minutes ago you couldn't even put Maddie's dress on." Callie asked.

"I had an epiphany?"

"Umm, right. Who helped?"

"Helped? No one I swear!"

"Sure."

"Fine, Derek showed me." He finally admitted. Callie nodded and gave Cristina a hi-five.

"I knew it! Ok, are we ready to get out of here? Frankly I'm sick of this place when I'm the damn patient." She said, climbing out of the bed.

"Have you been officially released yet?" he asked, picking up the two carriers.

"Damn, no one has been in here."

"Wrong." Cristina said, grinning.

"Oh, you're my resident?" she asked.

"Yeah, I volunteered to take it so I could use it as an excuse to see the girls."

"Cristina Yang volunteering to be on the gynie brigade?" Mark said smirking.

"Yeah don't say a word, sperm donor!" Mark chuckled and turned to leave.

"So I'm free to go?" Callie asked.

"Yes and surprisingly I'm off with you. Since I was on call last night. My hours are up and I can't wait to get home."

"You want to go home and not spend every waking moment here?"

"Yes, Jaime is home. He made everyone go home early so he cold be there when you guys got home."

"Oh how sweet. Barf!"

"Oh shut up and let's go." Cristina said, grabbing Callie's bag as Callie grabbed the diaper bag. Mark carried the girls while Callie got the wheelchair treatment, whether she wanted it or not. Everyone gave her their congratulations and told them how beautiful their daughters were. Mark proudly beamed at them as they talked about his daughters.

Once they were home, which took three times as long because Mark refused to drive faster than 20 miles and hour, Cristina had opted to take all of the bags while Mark and Callie carried in the girls. Mark climbed into the back of the SUV and freed Annie from her seat and handed her up to Callie. She wrapped her pink blanket around her and carefully got out of the car. Mark then freed Maddie. Callie had walked over to his side of the car.

"Make sure her blanket is securely around her. It's really windy and chilly." She said, peering over his shoulder.

"I've got her Cal, calm down." He said, as he backed out of the backseat and planted his feet on the ground. Callie nodded in approval as he wrapped the purple blanket around her.

"Happy now?" he asked, sarcastically.

"Yes, don't act like that when it comes to our daughters. You're just going to have to deal with me being an overbearing person for awhile, once I get the hang of this thing."

"Ok,ok. Come one and let's show them their new room." He said, almost giddy.

"Are you Mark Sloan, excited about being a father?" she asked, smiling.

"Maybe a little. Ok maybe a lot. They are the first things that are truly mine. No one can take them away from me and I don't have to fight for their love and approval." He said, smiling back. Callie stood on her toes and kiss him gently.

"Them and me are yours and only yours. No one is ever going to take them away. I promise. I love you Mark." She said, as she pulled back. Annie began to whimper between her parents.

"Someone doesn't like that she's not getting all the attention." Mark said, grinning.

"Something she obviously gets from you. The laid back one is totally me." She said, looking down at Maddie in Mark's arms.

"Would you two get in here before those babies catch a cold!" Rosa, called from an opened window. Callie chuckled and Mark looked over his shoulder and smiled warmly at his soon to be mother-in-law.

"We're coming Rosa."

"How many times do I have to tell you Mark! I'm your mother!"

"Yes ma'am." He said, and looked back at Callie who was grinning. Rosa shut the window and Callie and Mark went into the house.

Callie smiled at the large group of people standing in the living room. Addison, Cristina and Alex accompanied her parents and brothers. Above their heads, over the mantle was a large pink banner reading 'Welcome home Montgomery and Maddilynn Sloan.' Her mother came over and snatched Annie from Callie's hands. She started to wail and Callie's instinct was to take her back but her mother shooed her away. She brought the tiny girl up to her shoulder and rubbed small circles on her back as she hummed to her. Annie immediately stopped crying.

"I have to remember that one." Callie said smiling. Maddie started to cry and Mark instantly tried to do the same thing Rosa was doing, but she wouldn't calm down. Every muscle tightened in his body. Rosa placed Annie is Addison's open arms and took the little girl from her father. She repeated the same thing and against Maddie called down.

"Ok, I don't get it. I did that and she wouldn't stop. What did I do wrong?" he asked, looking like a little lost puppy. Callie giggled and wrapped her arms around Mark's waist.

"You tensed when she was crying. They can detect that thing. You have to be calm or at least as calm as you can be." She explained and kissed his cheek. Mark rubbed a hand over his face and sighed.

"They are going to kill me slowly aren't they?" he asked, turning to Emilio.

"Yes and you're already gray. That little girl attached to your hip caused every one of mine. Mark looked down at Callie who just shrugged her shoulders. Mark pressed a kiss on to her head and she smiled. Annie began to cry again.

"I think someone's hungry and she needs a diaper change." Addison chimed in. Mark pulled Callie away from him and went to Addison, taking his daughter from her. Callie watched as he retreated upstairs to change her.

After 15 minutes, Mark still hadn't returned.

"I should go check on him. It took him 20 minutes to figure out how to put Maddie's dress on. He then gave up and I finished dressing her." She said as she started to go up the stairs. Addison grabbed her arm.

"I'll go. You'll freak him out if you go up there." She said, and walked up the stairs. She walked to the room and stood in the door way as she watched Mark stand at the changing table.

"Ok, this tab goes here and… ahhh!" he exclaimed stepping away from the table. Addison came in and laughed at the site. Annie had peed all over him and her dress.

"Oh shut up Addison! No one said I was a natural. I'm learning here. Now don't just stand there, help me with this diaper!" he said, flinging his hand. The diaper was stuck to his hand. Addison ripped it off his hand and threw it in the trash.

"Ok, first wipe her clean." She explained. Mark grabbed a new wipe and cleaned her.

"Ok, now get a fresh diaper and open. Then lift her up, place it under her and then bring the tab to the front." Mark did as she explained and smiled when the diaper didn't fall off when he picked her up.

"Ok, how many diapers did you go through?" she asked, as she wiped the pad on the table clean.

"Umm, 4. They wouldn't stay on! And now I have to change my shirt and her dress. I swear baby clothes are the made complicated to mess with new dads." He explained as he laid Maddie back on the changing table. He pulled his shirt over his head and then successfully removed Annie's dress. Addison handed him a new dress and he thought for a minute, going over what Callie had told him earlier. He remembered to unbutton the dress and slipped it over her head. He then pulled her arms through and re-buttoned it. He smiled at him self and picked her up.

"See you can do it. I was wrong about you. You're going to make a great father Mark." She said, as Mark cradled Annie against his toned chest. Mark smiled and kissed the top of Annie's head.

"Thanks Addison, that means a lot coming from you. Now let's get out of here before my finance' comes up here thinking I smothered our daughter." He said, smiling.

"Took you long enough, and where's your shirt?" Callie exclaimed taking Annie from him. She popped a warm bottle into her mouth and Mark took her back, resuming the task.

"Sorry, I had some technical difficulties and she peed all over me and her dress."

"She what? That dress is made of Asian silk!" Nicky exclaimed, from the couch.

"That's what you get for making a clothes line for infants Nicky. You do know that they will be puked, pooped and peed one don't you?" Callie asked, smiling at her brother.

"Well I do now!" he said, folding his arms across his chest.

Once everyone had left and Callie's parents retreated to the guesthouse, Cristina and Jaime into her room, Mark and Callie stood in the nursery and stared at their daughters as they slept. Callie had her head resting against Mark's chest and his arms were wrapped around her. They remained silent as they listened to the rise and fall of their breathing.

"Cal?"

"Hmmm?"

"Have I told you how much I love you?"

"Not today."

"I love you with every beat of my heart."

"Ok, now you sound cheesy."

"I know but I'm being serious. You and our girls are my world. I can't imagine my world with out you guys in it. So in a way I'm glad I knocked you up."

"To be honest me too. That day I was in a world where everything was tumbling at my feet. My innocent flirting led to the best thing to ever happen in my life. I got you and the most beautiful little girls in the world. I love you too Mark." She explained, and kissed him. He went to grab her behind but she stopped him.

"Six weeks, Mark."

"Ugh! This is going to be the longest six weeks of my life."

"You and me both. Come on lets get some sleep before they wake up." She said, leading him to their room across the hall.

Mark helped her into her pajamas and climb into the bed. Mark stripped to his boxers and climbed in behind her. He pulled her close to him and she held his arms tightly around her. Neither had noticed how tired they were, but both fell right to sleep. 4 hours later they were awakened by the wails of their daughters.

"I'll go. And so begins parenthood." Mark said, climbing out of the bed.