AN: So I was sitting on my couch listening to my IPod and a story popped into my head.

Disclaimer: You know what I am not even going to put one because I can't think of anything original to say. Plus it's pretty obvious I don't own it so what is the point.

Castle was sitting at his desk working on his latest novel when he heard a small little voice.

"Daddy?"

"Well hey there sweet girl."

"It's night night time."

"OK baby girl lets go." He pressed the save button and picked up the beautiful girl that was the spitting image of Kate. When they reached the fool of the staircase she began to wiggle so he sets her down. Kate was waiting at the top watching their daughter slowly work her way to her.

"Come on Lexi." She was fumbling up the stairs dragging her teddy bear. She turned around and smiled at her father.

"Sleep tight blue eyes and bouncing curls."

*FLASHBACK*

All Rick could think was that he was too young for this. He was a college student and a bestselling author but most of all he was still a kid himself. How in the world was he going to raise one? Rick had dreams but all of a sudden they were going up in smoke. He had plans to get out of New York, travel around Europe with nothing but a backpack. But he guessed those plans were long gone now.

"There goes my life, my future, my everything. I might as well kiss it all goodbye."

"Hey Rick you aren't the only one losing everything here. How am I supposed to become a police officer with a kid that I have to look after? Stop only thinking about yourself."

"Look Kate, I'm sorry, but I can't do this. I'm only 22."

"Newsflash Castle I'm 19. What in the hell makes you think that I can? But it doesn't matter. I'm not letting you out that easily. This may have been a mistake but you and I aren't."

They had a few years of being up all night. Between cases, writing, and of course when a two year old has a nightmare no one gets any sleep. But standing in front of the refrigerator, seeing pictures of the mistake they thought that they had made cover it. He began to realize something.

"She may have started out as a mistake but I love that little girl with every fiber of my being."

"I know you do Castle."

About two hours later just like clockwork they heard a scream coming from Alexis's room.

"You go this time, that sounded like an 'I need my daddy scream'"

Castle was rocking Alexis to sleep and she was just barley awake when she raised her little head to kiss his cheek.

"I love you daddy. Night night." A tear ran down his cheek and he put Alexis back to bed before slowly creeping out of the room.

"I love you too baby girl." And he quietly closed the door, leaving it open just enough so that she could easily get out if she needed too.

*FLASHBACK*

Kate wakes up to Alexis's screams coming from the baby monitor. Rick however had been up all night. The sound of his baby crying broke his heart. She had been crying since they laid her down. They had both been hoping that she would eventually cry herself to sleep.

Rick gets up and heads for the kitchen. As he walks passed the coffee pot he flips it on before heading up the stairs to try and settle their new born. He tried for 30 minutes before giving up and deciding maybe she wanted Kate. He passes her the baby before turning to splash water on his face.

"It's going to be OK Rick."

"How can you say that? She hasn't stopped crying since we brought her home three days ago."

"Will you stop being so dramatic. You know one day we are going to look back on the week we brought her home and we are going to laugh. She is just scared. She doesn't know where she is. You just have to give her time. I promise this phase is going to fly by."

Rick was sitting in his usual seat next to Kate's desk admiring her as she did her paperwork. A few curls had fallen from her ponytail now framing her face. She tried several times to blow them out of her eyes only to have them fall right back to where they were. Finally she just took her hand away from the keyboard long enough to brush them behind her ear.

He glanced down at her desk to the picture of her an Alexis at a Yankee's game. He didn't even realize he was laughing until she asked him what was so funny.

"I was just remembering that first week with Alexis."

"There was nothing funny about that week. We barely got any sleep."

"If I remember correctly you were the one that said one day we would look back and laugh."

"Well I was sleep deprived."

"You know Alexis starts kindergarten in a few weeks. Are you ready?"

"You know I am the youngest homicide detective and I can chase down cracked out drug addicts three times my size with no problem. But sending my baby girl to school scares the crap out of me."

All morning trying to get Alexis ready for school was proving harder than even their toughest cases. They had tried to tag team but it hadn't worked as well as planned. If Rick was trying to dress her Kate became a human shield and if Kate was trying Alexis glued herself to Rick's legs.

When Kate had tried to put her in her car seat Alexis would not let go of Kate's neck. Normally she would have just put her arm on Alexis's chest and pushed until she broke the child's grip but this time Alexis had a hold of Kate's hair as well.

Finally after several bribes that hadn't been heard they reached the school. Alexis had her face buried in Kate's neck crying quietly. That was the one sound that got through Kate's armor and broke her heart. When they reached the classroom rick pried Alexis away from Kate and stood her beside him. She instantly attached herself to his legs once again. Kate was relieved to no longer have to hear her daughters' cries but seeing her hid behind her father wasn't much better.

"Hello, my name is Miss Bell."

"Good morning. My name is Rick; this is my wife Kate and our daughter Alexis."

"Well hi there Alexis. Can you tell me your last name?"

"It's Beckett" Kate answered. She was worried if it got out that her last name was Castle that the school would become overwhelmed with photographers trying to catch a glimpse of Alexis.

"Have you been informed of the security protocol that is to be followed when she is picked up after school?"

"Wow you can clearly tell that you are a cop." Kate glared at the women. "But yes I have been informed. No one besides you or your husband is pick her up unless they are able to tell her a word that only she and one of you would know." Kate and rick both nodded.

"Well, Miss Alexis would you like to come in and play with the other children?" Alexis shook her head, her pigtail almost hitting her teacher in the face.

"Rick we really need to get going. We have that appointment." She gave him a knowing look hoping he would be able to follow and of course he was.

Miss Bell pealed Alexis away from Castles leg. "Is there anything we can do to keep this from happening?"

"Mr. Beckett," Kate could help but laugh hearing him called by her surname. "This will only last a week maybe. Then one day out of the blue you will drop her off and she won't even know you are gone."

It was 4:30 in the morning when Castle woke up because he felt like he was being watched. He checked first to see if it was Kate but she was fast asleep, her hair sprawled out on her pillow like a halo. He looked to the foot of the bed to see two little eyes peering up at him.

"Did you have a bad dram baby girl?"

"Yes sir." Even when she was scared she never forgot her manners.

"Would you like to sleep in between mommy and me?"

"Please, can Beary come too?"

"Of course baby girl. Come here." Castle picked her up and laid her in the middle of the bed.

"Well, hey there princess. Are you sleeping with us tonight?"

"Yes mommy." Kate smiled and kissed Alexis on the forehead before reaching for Castle's hand and moving them so they were draped over Alexis like a protective barrier. It didn't take long before all three Castle's were resting peacefully cuddled up together.

AN: OK I know Alexis looks nothing like Kate but this is an AU. I have a second chapter in mind but I would love to hear if you guys would actually like me to continue this story. So Please hit that little blue button.