Prompt : Millie meets her little brother

There was a half-curious, half perplexed look on Millie's face as she was looking at her little brother.

Felicity had just been back from the hospital with Baby Nathan one hour ago. The family and their new addition were now in the living room, Felicity on the couch holding the baby, and Oliver facing her on the coffee table, Millie standing between his legs, her thumb in her mouth and the other hand scrunching the fabric of his t-shirt with her little hand.

She had been slightly clingy since they had brought the baby home.

"Why doesn't he say anything?" she asked

"Because he's a baby. He doesn't talk yet, he has to learn. You'll help us teach him, ok?" Felicity told her with a soft smile.

Millie nodded. "Ok." But the answer was halfhearted at best.

"It's time for his nap. I'll be back in a moment."

"See you later, Nathan," Millie said, leaning in and pressing a kiss on his forehead.

She watched her mom climb the stairs before turning to Oliver.

"Do you have to go with the baby?"

"No. Mommy's got this. I'm staying down here with you."

He was caressing her back softly and he felt her relax at his words, and the grip on his t-shirt lessened. He had a pretty good idea where this was coming from.

He softly stroked her knuckles. "What's with the thumb? I thought you had stopped a few weeks ago?"

She pulled it out, muttering 'sorry' and wiping the digit on her shirt.

"Hey, it's ok if it makes you feel better. But if something is bothering you, you can talk to mommy and me, ok?"

She hid her face in his neck and his arms wrapped around her protectively.

"Talk to me, baby girl."

He felt her sigh, a small breath against his skin, and he raised from the table to sit down on the couch, settling her on his lap. He waited patiently to see if she wanted to talk. In the end, she mumbled but he was able to figure out the words. He had almost 6 years of experience in Millie-talk after all.

"Mommy loves the new baby more?"

His hand came to cup her head and he pressed a kiss to her forehead. "No, she doesn't. But Nathan can't do anything by himself, he's too small. We have to do it for him, like putting on clothes, and feeding...As his big sister, mommy and I are counting on you to help us."

That got her attention and she raised her head. "To do what?"

"Well take care of him for a start, then teach him stuff, like talking, and playing, and having fun."

She bit her lip, mulling it over before nodding. "I can do that."

Oliver smiled, putting a strand of blond hair behind her ear. "I know you can, sweetheart. Mommy and I trust you. And we love you, more than anything in this world."

"Me too Daddy. I will show Nathan how to do the puzzles. And I will share my Barbies with him. And my books."

Oliver smiled. "He's lucky to have a big sister like you."

"I'm lucky he's my little brother," she said and Oliver chuckled.

"That too."

Felicity joined them. "Is that a Daddy/daughter moment or can I cuddle with you?"

Oliver looked at Millie. "What do you think?"

Millie giggled and held her and to Felicity who slumped on the couch next to them, snuggling against her husband, her hand grasping her daughter's and putting a kiss on it.

"Everything ok?" she asked casually, her eyes meeting Oliver's, and he gave her a reassuring smile.

"Everything's fine now."