Thanks to everyone for the great reviews on the last chapter!

While I was rewatching this episode, I had a thought, how the HELL did

I don't anything!

….

-The Song Beneath The Song-

Mark groaned as he came to and pushed the airbag out of his face.

"Lexie?" He muttered, looking around the car. He gasped when he saw shattered glass and Lexie's empty seat, her feet dangled through the broken windshield.

"Lexie!" He yelled.

He quickly undid his seatbelt and got out of the car.

Lexie was lying face down on the hood of the car, the engagement ring box lying next to her. She was hyperventilating and covered in blood.

"Oh, God, Lexie," He murmured. "Help! Someone help!"

The driver of the truck they had hit ran over.

"Call 911!" Mark yelled before furiously trying to dial on his broken cell phone.

….

Meredith was charting when Derek walked up to her.

"What's going on?" She asked him, looking up at his grave expression.

"There was an accident. Lexie… It's really bad, Meredith…"

"No…" Meredith choked up, tears forming in her eyes.

Derek nodded.

Meredith ran off towards the E.R.

They had to save her little sister, they just had to.

Derek quickly caught up with her and they ran outside, where there colleagues stood clad in trauma gowns.

"What the hell happened?" Meredith asked.

"Car versus truck, that's all we know," Owen said.

"Injuries?" Meredith asked, her hands beginning to shake.

"Someone get us trauma gowns!" Derek yelled.

"You need to sit this one out," Richard said.

"What? Richard, this is my little sister, please!" Meredith begged.

"Family can't be in the O.R., you know the rules. You can't rationally do this," Richard said gravely.

"We aren't legally married…" Derek muttered. "I'm technically not family!" He yelled out.

Richard thought for a moment. "Okay,"

Derek quickly put on a trauma gown.

"I'm in the room," Meredith said sternly, her eyes blazing behind her tears.

Richard nodded.

They could hear sirens coming closer.

The ambulance pulled up.

"Hunt! You're in charge!" Richard yelled.

"Alright, I want multiple blunt trauma protocol, let's go!"

"Lexie's tachycardic and hypotensive on route. Obvious head and chest injuries." Mark said, climbing out the ambulance.

"Lexie? Lexie?" Owen asked as they pulled the stretcher out of the ambulance. "Can you hear me? Everything is going to okay."

Mark and Meredith stood back as everyone began to treat her.

Lexie opened her eyes, she could hear everyone yelling about her injuries. It hurt, it really hurt.

As they ran off with the stretcher, Meredith walked over to Mark.

"What happened?" She asked him shakily.

"It came out of nowhere. I asked her to marry me and a truck came out of no where," Mark said in disbelief.

The two ran off towards the trauma room.

They watched as the other's tried to save Lexie. They tried to ignore the blood covering the room. Mark was a mess, he wanted to know that Lexie and the baby were okay, he wished it was him on that table. Meredith had begun to sob uncontrollably. A nurse had tried to escort her out, but Meredith had refused.

The room was a blur of shouted injuries and doctors.

"Is there a fetal heartbeat?" Mark asked anxiously. "Lucy, is there a fetal heartbeat?" Mark yelled.

The two of them stood against the wall watching their worst nightmare.

On the table, Lexie was in and out of consciousness. She could hear Meredith crying and Mark shouting above the sounds of the other doctors.

All she wanted in that moment was to be in Mark's arms.

The other doctors ran around the room, trying to save her.

She thrust out a bloody hand, as if frantically searching for Mark, Bailey grabbed it and held it tight.

She wanted to know that her baby was okay. That was all that mattered to her. As she began to lose consciousness again, she silently hoped that her baby would survive, even if she didn't make it.

"Derek, please," Mark looked at his friend.

"How are we doing with that heartbeat?" Derek asked.

The other doctors continued to yell.

"If we're gonna find that heartbeat, I'm gonna need everyone to shut up for a second!" Lucy said loudly.

"Everyone quiet, right now!" Richard yelled.

The room grew silent as the room filled with the baby's heartbeat.

When Lexie heard her baby's heartbeat, she closed her eyes. She began to code, her eyelids fluttering.

Meredith began to sob harder.

"Come on, Lex," Mark muttered through his forming tears as if begging her to come back.

"She's back!" Owen yelled as Lexie's heartbeat came back.

"Good girl," Mark said softly, as the others ran off with Lexie.

Seeing that the elevator was full, the other's ran to take the stairs. Mark stood there in shock. "I asked her to marry me and a truck came out of nowhere."

Mark sat in the O.R. gallery as the others began to operate on Lexie. He tried to ignore the blood covering his body. Lexie's blood.

"Someone should check on Meredith," Derek said, noticing she was nowhere to be found.

"I'll go," Richard said. He was just observing, he knew Little Grey was in good hands.

After finding out where Meredith was from a couple nurses, he went to the stairwell.

Meredith looked up at him, tears in her eyes.

"Is she…?" She asked shakily.

"No, no, no. Everyone is doing the best they can."

"I know that I should be there, that I should be there for Lexie and for Mark, but I just can't stand to see her like that and I'm scared to be there, I'm scared of what could happen to her," Meredith sobbed.

"Meredith, it's okay to be scared. Lexie is going to receive the best care this hospital has to offer, you know that," Richard said, coming over and putting a hand on Meredith's back.

"This is my fault. I got them the trip. This is my fault. I almost killed my baby sister." Meredith sobbed, falling into Richard's arms.

"It's not your fault," Richard said, comforting the closest thing he ever had to a daughter.

Back in the O.R., they were able to temporarily stop Lexie's bleeding, but she had begun to contract so they had closed her up and would try to wait another 24 hours.

Mark put his head in his hands. He couldn't lose them.

"Hey," Callie said softly as she walked into the room. "I just heard." She said sitting down next to him.

She, Arizona, and Jessica had been at the aquarium, celebrating the engagement and planning to ask Jessica if she wanted them to adopt her.

Their phones had been off and they had ended up being paged over the aquarium loud speakers.

Callie had immediately rushed to find Mark, while Arizona had dropped Jessica off at the daycare and then changed into her scrubs in case they had to deliver Lexie's baby.

"You need anything?" She asked him.

"No. I… I'm fine…" Mark said, beginning to sob. He had walked away from the accident with a cut, Lexie was…. He didn't even want to think about it.

Callie began to rub his back. Mark looked down at Lucy, clearly out of her league.

"Actually I thought of something," He choked out.

"Anything," Callie said.

"Call Addison," He said firmly.

…..

Addison stood in Lexie's room assessing her and yelling at Lucy.

Lexie had to be okay. If she wasn't it would destroy Mark.

"I'm so sorry. It's okay. We got this." Addison said firmly. "The attendings, we are all gonna meet and we are gonna come up with a plan. I promise you. We're gonna make a plan and we're gonna figure out what to do. It's gonna be alright. You're gonna be okay, Little Grey."

"You think she'd have a better chance now if we took the baby out electively?" Mark asked. Bailey had come to him and Meredith with the attendings' decisions. Meredith stood next to him. Since she was Meredith's sister, she would have to make the decision.

"Lexie's cardiovascular status could possibly be great. We just need to know…" Bailey trailed off.

"What we wanna do…" Mark said softly.

"No, what Lexie would want us to do." Meredith said.

"The baby's barely viable," Mark said.

"Are you insane? Lexie wants a baby! Were you NOT at her baby shower?" Meredith yelled.

"She doesn't want our baby to grow up without her! She wants to live!"

"She'll never forgive us! We can't do this to her! We can't do this to YOUR baby!"

"Well, we can't let her die!" Mark yelled back.

"She could have permanent brain damage. There might not be a Lexie to save. We have to save your baby."

"Don't you dare say that! She is going to be fine!"

Bailey walked into Lexie's room, closing the door behind her, trying to drown out Lexie's fighting boyfriend and sister.

"There could be all kinds of complications for a baby born at 23 weeks, are you even thinking about the baby?" Meredith asked him. She wanted her sister to be okay, but she knew Lexie would never forgive them if they put her life over the baby's.

"No, I'm thinking about Lexie! I care. This is MY baby! Do you have any idea how hard this is for me? This is my baby! But this is also LEXIE! I can't lose her Meredith, I just can't." Mark said calmly.

"Okay," Meredith said softly.

…..

Later they were sitting in the conference room with Derek.

"She didn't respond?" Meredith asked tearfully.

"She opened her eyes, but it's too soon to tell." Derek said.

"She followed commands. Anything else?" Mark asked hopefully.

"No, nothing else," Derek said gravely.

…..

Mark sat in Lexie's room.

"Lexie, I love you. So much. I have always been in love with you and I will always be in love with you. Which is why you have to live. For me and for our baby. We're going to get married. You'll be an amazing surgeon. We'll have this baby, and maybe even a few more. We're going to have the best life, you and me. You can't die because we're supposed to end up together. We're meant to be. Please just give me some sort of sign." He said, clutching her hand.

Lexie began to move her finger.

Mark's face broke into a tearful smile.

"I love you," He said, kissing her hand.

Lexie began to code.

"Help!" he yelled.

Addison ran in with a few other doctors.

They decided they had to take her to the O.R. again.

He ran down with her gurney, before he stopped. He and Meredith weren't allowed in.

The two of them ran up to the O.R. gallery.

Their fight from earlier had been forgotten.

The two of them clutched hands as they watched everyone prepare to operate on Lexie.

They clutched their hands tighter as Lexie began to code.

The two of them stood up and ran down to the O.R. as Addison began to remove the baby.

Mark opened the door and saw his tiny baby. He had a daughter. She wasn't crying.

He stood in the middle, torn between Lexie and their daughter.

Knowing what Lexie would want he ran over. Arizona and Alex began to working on his daughter.

"Grey's coming back!" Richard yelled.

Mark felt tears form in his eyes as he watched his lifeless daughter.

"I have a heartbeat!" Arizona yelled triumphantly.

"Mom's heart is strong," Richard responded.

Mark breathed a sigh of relief. They could be a family, they could do it. He knew they could.

…..

"We've tried everything we can, now all we have to do is wait for her to wake up," Derek said, standing in front of Lexie's room.

"She barely responded before, which could mean her brain wasn't ready or…" Meredith trailed off.

"Or it could mean she's not going to wake up," Derek said.

Meredith walked off with Derek into the elevator.

He noticed that she was crying so he stopped it.

"I've been jealous this whole time. My little sister was going to have a baby before me. And then I got them that damn bed and breakfast. I would give up having a baby if it meant Lexie could be okay. She's the only family I have left. I can't lose her." Meredith sobbed.

Derek held her close. "You won't." He whispered softly, hoping it was true.

…..

Mark sat in the NICU, stroking his tiny daughter's hand.

She was barely over a pound and small, so small she didn't look like a real baby.

"Hey, baby girl. It's Daddy. I know that you're scared, but you're gonna be okay. Your mom is Lexie Grey and she's a fighter just like you. We're going to fine, sweetie, I promise. I love you." He said softly, watching breathlessly as his daughter's tiny chest moved up and down with each breath.

"We have a little girl, Lexie. She's really small right now, but so beautiful, Lex. She already looks like you. And she's a fighter, just like you. I'm her daddy, but I can only do so much. She really needs her mom. I really need you. And she doesn't even have a name yet, she needs a name, I know, but I can't do that without you. I love you, Lexie. I don't care if we ever get married, please just wake up for me and our little girl."

He watched in amazement as Lexie's eyes began to flutter.

"Come on, Lex. You can do it."

Lexie opened her eyes and looked at him.

"Yeee-eeeessss," She slurred.

"Lexie," He said breathlessly kissing her forehead. "I should probably get someone," He stood up before turning. "Did you say yes?" He asked her.

Lexie weakly nodded. "Emma. Her… Name is… Emma." She said softly.

Mark chuckled, "Emma Susan Sloan, I like it. Thank you for waking up." He said, kissing her hand.

Lexie grinned at him. "I love you."