A/N: The first time I wrote a Lily birthday chapter, she turned fourteen. In this one, she turns twenty. This also means that GryffindorPrincess23 and I are turning twenty. Life. Is. Terrifying.

"Happy birthday, Sissy!" Christine squealed, jumping on Lily's bed.

"Thank you, sweet girl," she said sleepily, looking over at the clock on her nightstand. "Baby, it's six in the morning."

"But Daddy said that we could have cake for breakfast!"

"Did he say cake, or pancakes?"

Christine looked thoughtful for a moment. "French toast! And then cake!"

Booth walked into her room, spatula in hand. "Are you getting up, sleepyhead, or what?"

"Daddy, you forgot to tell her happy birthday!" Christine scolded.

"Sorry, sorry. Happy birthday, sleepyhead."

She moaned in response, flashing him a thumbs up. "This is way too early to be up on your birthday."

"Do you want French toast before I go to work, or not?"

"Fine, fine, fine." She yawned, sitting up.

"So, what are you going to do to celebrate your twentieth birthday?" He frowned. "You're old."

"How many are you?" Christine interrupted.

"SO many!" Lily held up ten fingers. "Hold up all of your fingers." She put her ten next to Christine. "So many that I need your help. I am this many." She waited patiently while Christine counted.

"That is so many!"

Lily looked back at Booth. "Who are you calling old, old man? Your child is twenty." Then, she frowned. "Ugh. I'm like, a real adult now. Gross. Nope. Hard pass."

Brennan walking out of her bedroom interrupted Lily's complaining. "Happy birthday Lily!"

"Thanks, mom." She hugged her tightly.

"So, what are you doing today?"

"Well, first, I am going to go back to bed."

"Don't you have class?" Booth asked.

"Dad. I haven't had class on Fridays literally all semester."

He shook his head, plating stacks of French toast and bacon. "So, you're going to sleep your birthday away. Well, at least you'll be doing something we all know you enjoy." She rolled her eyes. "Have you at least decided where you want to go for dinner?"

She shrugged. "I have options. And I'm going to skype Lucy at some point, probably." She sighed. "Year two and I still don't like spending birthdays apart."

"What do you say we go ice skating?" Booth suggested. "You always loved ice skating."

She nodded. "That sounds fine."

"Fine? Fine? I don't want your birthday to just be 'fine'."

"How about I pick Christine up from preschool, and we go and do some fun stuff until you guys get home?" She tickled the girl's side. "Huh, Baby?"

"Yes!"

"You're going to spend your birthday with your three-year-old sister?" Booth asked. "What about your friends?"

"Uh… I'm going to celebrate with them later."

"Is this a celebration that, as your father, I don't want to know about?"

"Maybe."

"Why wouldn't you want to know?" Brennan asked. Then, she nodded conspiratorially. "Ah. Alcohol."

"Mom."

After a full day of hanging out with Christine, visiting the lab to pick up her birthday presents from the Squints, ice skating, and dinner at her favorite upscale restaurant, Lily was curled up on the couch in between her parents, struggling to keep her eyes open as the credits of her favorite movie rolled.

"So did you have a good birthday?" Brennan asked, checking her watch. "Since it is now twelve fifteen am, making it April eleventh."

"I have decided that it's my birthday until I wake up tomorrow morning," Lily said stubbornly. "But, yes. It was wonderful."

"Welcome to your twenties," Booth smiled, rubbing a hand over her hair. "But don't forget that no matter how old you are, you're still our little girl."

"Oh, believe me, I'm milking that for the rest of your life." Booth sighed sadly, and Lily sat up. "What? Are you sad because if I'm old, you're really old?"

He shook his head. "No. I'm sad every year when this day comes around." He looked at Brennan. "We always will be. Just a little."

"Why?"

"Because I—we—weren't there on the actual day you were born, like parents are supposed to be."

Lily rolled her eyes. "You've done a pretty great job of making it up to me so far."

"Yeah?"

"Yeah. And, if you want to celebrate me even more… we found out you were my dad a little later in April, six years ago."

"Yeah, that sounds like a good day to celebrate," Booth smiled. "Happy birthday, Mini."

A/N: the ending was not supposed to be that sad. it just kind of happened. whoops. I hope you enjoyed! please, please, please review!