Prompt originally taken from tumblr, at:

post/34368186111/captain-swan-prompts-collection

A/N: This is my first attempt at ever writing my own story, so please be gentle! I'm going to be doing each of Emma's reasons as a separate chapter. This first chapter is kind of prefatory, but I found it necessary to help set the tone for the story. Please enjoy, and I will update soon! Also, the rating MAY go up next chapter!

Prompt: Five moments when Emma realized she wanted to marry Killian; one of them includes Killian being mistaken for Henry's father on an outing.

Ding, dong. Ding, dong.

Emma could hear the church bells chiming as she stood in the foyer behind the double doors. She couldn't believe that her big day was finally here, and she was having trouble coming to terms with the reality of it all. She had never known happiness quite like this before.

She felt a presence over her shoulder. She turned to see her father, David, coming toward her. He put his arm around her shoulders, placing a soft kiss on her forehead. "You ready for this?"

She nodded.

"You sure?" He asked her, although he knew the answer full-well.

She looked at him and smiled. "I've never wanted anything more." As she spoke these words, she could feel a lump forming in her throat as a solitary tear rolled down her cheek.

David looked at at her wistfully. He had only seen his daughter get so emotional on a handful of occasions, and it was still a relatively strange sight for him. He held her face in his hands, wiping her tear away with a quick swipe of his thumb, careful not to disrupt her makeup.

"Okay, it's alright, Emma. Your mother would have my hide if she knew I'd brought you to tears just minutes before having to walk you down the aisle."

Emma sniffled as she laughed softly at David's joke. Mary Margaret was sweet and polite, but under the right circumstances, she could be as aggressive as they come.

David continued to joke with Emma, hoping to relieve some of the nervousness that she was feeling. He was also trying to keep himself from shedding a tear or two. Although he was happy for Emma on the biggest day of her life, he also felt sad and guilty.

He couldn't quite place it, but he figured it had something to do with having to give her up as a baby, and having to miss so many other milestones as a consequence of that decision.

Emma noticed a darkening in David's eyes, and pulled him in for a hug. He stiffened, having been caught off-guard, but returned the embrace in a second.

"What was that for?" He asked, a goofy smile on his face.

Emma looked at him, her eyes welling up again, she wasn't sure quite how to put her sentiments into words, but she was about to say something that, earlier in her life, she never thought she would be able to.

"I love you, David. You are a great father, and I know that you try. You don't have to feel guilty for any of the choices you or Mary Margaret have made. This is a celebration, and I want my parents to be happy and enjoying this day with me."

David was touched. He sighed and hugged Emma again, a little tighter this time. He looked down at his daughter as if she just given him the best news of his life. "I love you, Emma."

She patted him on the shoulder, holding his gaze. "I know you do."

A second later, the double doors of the church cracked open, and a head peeked through. It was Ruby, in her bridesmaid's dress.

She smiled at the bride, and was almost taken aback by how beautiful Emma looked. "Hey, Em. You look... stunning. Are you ready?"

Emma smiled at her friend, and nodded. Ruby went back into the church, and within a few seconds, Emma and David heard the chattering inside fall to barely a whisper.

They looked at each other as the Wedding March started playing. David took Emma's left hand and placed it in the crook of his right elbow, standing next to her proudly. He placed a light kiss on her temple as he noticed her nerves start to return.

"You don't need to be nervous, Emma. This is going to the happiest day of your life."

She looked up at him and sighed, not realizing how tightly she was gripping her bouquet of white gardenias. "You're right." she said, taking a deep breath in, then out. She straightened her stance, put her shoulders back and had put a smile on her face only a split second before the double doors to the church were opened.

All of the residents of Storybrooke rose and turned to see their sheriff about to make her way up the aisle on the arm of her father.

Emma and David stepped over the threshold and into the church.

Emma tried to keep a relaxed look on her face, although she was uncomfortable with the attention. She kept her eyes trained on her mother, who stood next to the altar as Emma's matron of honor.

Mary Margaret looked at her daughter and husband as they came up the aisle. She discreetly wiped her tears, and smiled in their direction.

Emma moved her focus from Mary Margaret to her son, Henry, who was standing in the front row of the church. When his gaze met hers, he mouthed the words "hi mom" and gave Emma a small wave. She smiled brightly at him, giving him a wink as she and David made their way closer.

That was when she saw him. Killian Jones, her fiance, her pirate, the love of her life, standing at the front of the church dressed stylishly in a classic black tuxedo.

His eyes looked watery, as if he were holding back tears, and Emma hoped for her own sake that he wouldn't start to cry because, of course, she would, too.

When Emma and David finally made it to the front of the church, David placed Emma's hand in Killian's hook, and nodded at Killian. He smiled at his wife, then patted the groom on the shoulder before moving of to the side to take his place as best man.

The ceremony was finally starting. Emma knew that she should have been paying attention, but before she realized it, she was lost in her own thoughts. She thought back to when she and Killian had first met, and then her mind wandered to her memories of their first date.