A/N: Thank you everyone for all of your reviews! It means so much! I hope this father/daughter conversation is all you've hoped it would be! Enjoy!

Sheldon walked into Lily's room to see her under her pink covers with reading a genetics book. He leaned on the door as he absorbed the beautiful girl in front of him. Her pin straight brown hair, her thick glasses framing her ocean blue eyes, her cute button nose: She was Amy. Sure, she had his eyes, but she was the spitting image of her mother, and he wouldn't want it in any other way.

"Hey Dad, did you know that in a typical group of fifty African monkeys, there are more genetic variations than in the entire human race?"

Sheldon in fact did know that. Thanks to Amy, he knew more about monkeys that he would like to admit. However, seeing the light in his daughter's eyes, made him swallow his pride. Lily tended to have that effect on Sheldon.

"Wow, that's fascinating Lil. Look at you, teaching me genetics."

"Dad, we both know you knew that."

"No I didn't!"

Lily looked at her father and rolled her eyes.

"C'mon Dad. You're telling me that the great Dr. Cooper didn't know that. Wait, that means I'm smarter then someone with two doctorates and a Nobel Prize!"

At that, Sheldon narrowed his eyes as Lily smiled with glee.

"Oh yeah smarty pants?"

Suddenly Sheldon jumped on to Lily's bed and started tickling her profusely. Lily started laughing hysterically, which was music to Sheldon's ears.

"You're smarter then me now?"

"Ok…ok…Daddy you win," said Lily gasping for breath.

They laid there laughing on her bed, until Sheldon realized it was time to get down to business.

"Lil, I know today is always really hard for you, so-"

"Dad, can I say something."

"Of course."

Lily took a deep breath knowing that this was going to be a tough pill for her father to swallow.

"Every year, you give me the same speech…I thought maybe we could do it a little differently this year."

Sheldon suddenly went from completely prepared to completely shocked. They had always done the same thing, and Lily was just fine with it. He was trying to protect her, but she wanted to know more. She couldn't handle it; she was just a kid.

"It's just that…you've never really ever talked about Mom, like really talked about her."

"W-Well, sure I have. I told you look exactly like her and…"

"I mean you never talk about her and…you."

Sheldon had never felt so nervous in front of his daughter. Of course, there was a reason he didn't talk about he and Amy's life together to Lily. He didn't want her to get upset. There was also the fact that every time he talked about the two of them, it felt like a knife in his heart with salt poured on it. He couldn't lie to her though because she could see right through him, just like Amy.

"Ok, well, what do you want to know?"

Lily thought about it for a while. What she always wanted to ask him, she asked her uncle only hours before. There was one thing she didn't know that only her father could answer.

"When did you first realize you loved Mom?"

Wow! He wasn't expecting that one! Why couldn't she have started with an easy one?

"Umm…well…"

What was the answer? Was there an answer? Why didn't he know?

"Dad, it's ok. I know this is hard for you to talk about. You don't have to answer that."

Lily never ceased to amaze Sheldon. She had his eyes, but more importantly she had Amy's heart. It was amazing just how much of Amy was in this beautiful girl.

"It was when Mom and I were dating, and Uncle Leonard and Aunt Penny just got engaged. I was overwhelmed with the change, and I just got on a train and left."

"Did Mom try and stop you?"

"Mom didn't know. I left without saying goodbye, and that ended up being my undoing. I was on the train and I felt myself feeling the need to talk to her everyday, and when she couldn't I would listen to her voicemails on my phone. I would think about her every night when I was sleeping. When I finally came home, I went to her apartment, and as soon as I looked into her eyes…I knew I never wanted to leave her again and…I was in love."

Sheldon took a deep breath. That was hard. He hadn't thought about that in a while. He remembered that moment they locked eyes. It was as if they were the only people in the world. He dropped his bags and dove into Amy's arms. Amy started crying and Sheldon then sat and cuddled with her on the couch without ever letting go. He rocked back and forth with her whispering 'It's ok" in her ear. He finally pulled away and wiped Amy's tears away with his thumb. It was the first time he had ever touched Amy's face. His hand never left Amy's face as he pulled her in for the most passionate kiss he had ever given her. They broke away, and with foreheads touching, he said the three scariest words he ever said to anyone.

"How did you ask Mom to marry you?"

This kid wouldn't give him a break. Why was she asking all the hard questions? Well, maybe she got that from her dad. This story was happy though, he considered it one of his many proud moments as Amy's significant other. It was the night he had won his Nobel Prize.

"Has anyone seen Sheldon," Raj asked.

"Yeah, the party's just getting started," said Leonard.

Just then, Amy received a text from Sheldon telling her his location.

"I know where he is. I'll be right back," said Amy as she exited 4A.

Sheldon stood on the roof of his apartment staring out at the beautiful city of Pasadena. He never truly realized how beautiful the city was until now. He then heard footsteps behind him.

"Hey you."

"Hello."

"What are you doing up here? Everyone's waiting for you."

"I'm confused Amy."

"Confused? Sheldon, you should be overjoyed right now!"

"Exactly," Sheldon said as he turned to Amy in frustration.

"Amy, all my life I have waited for this day. It has been my main goal to win the Nobel Prize, and I did. Now, I realized I no longer have any goals. What am I supposed to do now? This is supposed to be the happiest day of my life, and I feel…incomplete."

"Oh Sheldon, I'm sure you'll think of something."

"I have thought of something, though. Something I've wanted for a long time, and I finally have the courage to make it happen, but…I can't do it without you. Will you help me?"

"Sheldon, whatever it is, you know I'll do whatever it takes to make you happy."

Sheldon then smiled at her and took her hands.

"Amy, you're truly the most amazing person I've ever met. You've opened my eyes, my mind, and my heart. I wouldn't be the person I am today without you, and I love you with every fiber of my being. Amy Farrah Fowler…"

Sheldon reached into his jacket with a box and went down on one knee.

"Will you marry me…and officially make this the happiest day of my life?"

Amy burst into tears and nodded her head. Sheldon put the ring on Amy and kissed her with all the love in his heart.

"Wow Dad! Didn't know you could be that romantic?"

"Trust me Lil, it took me quite a while to get to that point."

"Were you right?"

"What do you mean?"

"Was that the happiest day of your life?"

"It was…until the day I married her. Then that was the happiest day of my life…until someone I know came along!"

Lily put her fists up in the air in victory.

"Lily Farrah Cooper for the win."

Ok so maybe Lily was a little more like Sheldon then he thought. But he smiled at his own flesh and blood. He and Amy created Lily out of love, and Amy's blood ran through Lily's veins. She was the only part of Amy that Sheldon had left.

"Daddy, do you believe in true love?"

"Umm…I don't know. Do you?"

"Why wouldn't I?"

Sheldon looked at Lily with such confusion. Her dad could be so naïve sometimes.

"I may have only been five Dad, but I remember her. I also remember the way you looked at her. It was like she was the only one in the room. I was so fascinated that you could say so much to a person without uttering a word."

Sheldon was so shocked; he couldn't look at Lily anymore. She remembered her! For eight years, she had never said anything.

"Second, if true love didn't exist, neither would I."

It took everything he had for Sheldon to not lose it in front of his daughter.

"Well, one cannot refute that type of logic, Ms. Cooper." Lily smiled. Amy's smile. "I guess I do believe in true love then."

"I'm glad we did this Dad."

"Me too, kid. You're your mother's daughter."

"Good."

He leaned in and kissed his daughter's forehead.

"I love you."

"Love you, Dad."

He left Lily's bed and opened the door to leave.

"Dad, you know that they're was nothing you could do, right?"

Sheldon looked to the floor and turned to his daughter.

"I know."

"Good."

Sheldon left Lily's room, and went into his own. He got dressed and laid on his bed looking at the ceiling deep in thought. It was almost like Lily could read Sheldon's thoughts. It was like a part of Amy lived inside of her. He sighed and turned to look at the two beautiful pictures on his nightstand. One was their wedding picture, and another was a family picture. Everyone was grinning from ear to ear. He had smiled like that in eight years. He took their wedding picture, and looked at Amy.

"You'd be so proud of her, kid. She's amazing, smart, beautiful…she's you."

He kissed the picture and put it back on his nightstand. He closed his eyes to sleep when he heard a knock.

"Daddy?"

"Lil, c'mon in. What's wrong?"

"I can't sleep."

Sheldon looked from his daughter to his smiling wife.

"Why don't you…come sleep with me tonight."

Lily smiled as she made her way to the other side of her father's bed, but she stopped.

"I remember drawing this." Sheldon looked up to see Lily looking at the picture she had drawn at the hospital eight years before. "You kept it?"

"I love that picture."

"Why?"

"That picture has gotten me through a lot of dark days, Lil."

"Well in that case, you're welcome!"

Sheldon smiled. Yep that's his daughter, alright.

Lily got into bed with Sheldon as he brought her closer to him.

"Goodnight Lil."

"Night Dad."

They both closed their eyes, and for the first time in eight years, Sheldon went to sleep smiling on Amy's birthday.

A/N: Well there it is! I was thinking I'll probably do one more chapter to seal the deal. Hope I didn't make anyone cry this time!