Hey everyone- mostly fluff from here on out. One more chapter left in this story. But I have a few- more angsty ideas that I'm working on separately. Hope you enjoy the fluff for now.

Once everyone has left, Barba and Olivia stand doing dishes at the sink. Barba stares pensively out at Noah- who is playing quietly in the living room. Olivia notices that he's lost in thought and nudges his shoulder with her own. "You OK?"

Barba sucks in a deep breath and looks at her, "Yeah, just thinking. How exactly are we going to explain it to him?"

Olivia smiles, "They understand more than you think. Just be prepared for lots of questions." She dries the last dish and looks to Barba. "You ready?"

Barba follows her hesitantly to the living room where they both join Noah on the floor with his trains. Barba takes one of the engines and drives it up to Noah, who giggles.

Olivia decides to take the plunge. "Hey Noah, you know how Benjamin's mommy just had a baby? And now Benjamin has a new brother?" Noah continues to drive his trains around the floor. "Remember that?"

Noah looks up at Olivia and nods. Barba looks nervously at Olivia, "Noah, your Mamí is going to have a new baby too. And you're going to have a new brother or sister."

Noah looks at Barba, perplexed. "Dónde está?"

"Well, it's in Mamí's tummy."

Now Noah looks at Olivia- concerned, "You eated it?"

Barba and Olivia both chuckle, "No, buddy, I didn't eat it. That's where babies grow- in Mommy's tummies."

Noah looks skeptical but continues his line of questioning, "How it's in there?"

Barba's eyes go wide in panic- Olivia puts a hand on his arm before he attempts an explanation, "Mommy and Daddy made it. And now it's growing."

Noah accepts the simple explanation much to Barba's relief, "I can see him?"

"Or her." Barba interjects.

Olivia rolls her eyes, "Not yet, buddy. The baby has to grow a little more. But you're going to be such a good big brother- the baby can't wait to come out and meet you."

Noah grins proudly. He leans over and whispers to Olivia's tummy, "I let you play with my train."

Olivia and Barba smile down at Noah talking to the new baby. Barba can't help but reach out and grab him- holding him up in the air to "fly", "I love you, Noah Benson! Mamí's right- you're going to be such a good big brother!"

Noah giggles. Both parents share a smile of relief that he seems to understand.

Four weeks later, Liv is starting to show at 18 weeks. She and Barba go in for what they hope will be their last ultrasound.

The doctor comes in and after a few routine questions- starts the ultrasound. After checking the heartrate and taking a few measurements, she turns to Liv and Barba, "So- do you want to know? Or would you rather it be a surprise?"

Oliva and Barba turn to each other- excited. Barba can barely hold in his excitement, "I think the pregnancy was enough of a surprise for both of us. We wanna know."

The doctor moves the wand around a couple times. "Well, it looks like you two are having a little girl."

"I knew it!" Barba nearly yells in excitement.

Olivia rolls her eyes, amused, "Great, I'll never hear the end of this."

The doctor chuckles, "Have you two discussed names?"

Olivia's eyes soften- Barba takes her hand as she says, "Yeah, we've decided to name her Catalina."

The doctor smiles at them before typing on the small ultrasound screen CATALINA BENSON-BARBA and printing out a few images from the session. "There you go, baby Catalina."

Both parents beam back at her.

Noah doesn't take the news that the baby will be a girl quite as well as Barba. Over the course of the next few weeks, he asks his dad "Why you didn't make a boy?" at least once a day- much to Barba's dismay.

At one point, in the bullpen- when asked by Fin if he's excited by the coming baby, Noah responds incredulously, "Tio, it's a girl one." As if to say, 'how could I possibly be excited about this?'

Noah's excitement soon returns, however. Midway through week 22, Barba comes home to find Liv cooking dinner and Noah in the living room. After a quick hello to Noah- who is far too engrossed in coloring to engage his dad- Barba makes his way into the kitchen.

I walks up behind Liv at the counter and wraps his arms around her from behind and places a kiss on the back of her neck, "I love it when you get home before I do."

Olivia smiles, "Don't be so sure. I'm trying something new and I gotta tell you, it didn't look like this when Giada did it."

He chuckles, "I'm sure it'll be fine." He moves his hand over Liv's growing baby bump and feels a sudden pressure under his hand. He freezes. "Did you feel-?"

A grin spreads over Olivia's face and turns to face him. "She's kicking you."

Barba's eyes light up- he stoops down to talk to her tummy- placing a hand where he felt the first kick, "Hello, Catalina." At the sound of his voice he feels another small kick under his hand.

He stands and turns towards the living room, excited, "Noah, ven aquí!"

Noah, hearing the excitement in Barba's voice, jumps up and runs into the kitchen. When he gets there, Barba stoops back down to his eye level. He takes Noah's tiny hand and places it on Liv's tummy, "Mira." Barba leans in, "Catalina this is your big brother Noah."

Once again the baby responds to Barba's voice, kicking Noah's hand. Noah looks up at Liv shocked. Barba grins at his reaction, "Es su Hermana."

Noah grins and leans in, he whispers (as well as a three year old can whisper), "Hi, Baby." He looks back up at Olivia, "Her wants to get out?"

Olivia chuckles, "Not yet, buddy. She has to wait a little longer."

Noah looks back at Liv's tummy and pokes where he felt the kick. Liv makes a move back towards the counter, "Alright, boys- enough playing with the baby, I've gotta finish dinner."

After dinner, Barba agrees to dish duty so Olivia can take a shower. Once he's done, he snuggles up with Noah to read a book in Noah's room.

Noah lays across the bed, a bit distracted. He puffs out his tummy and looks up at Barba with excitement. "Mira, Papí!"

Barba's heart flutters- Liv and his mother had been running a covert operation to get Noah to stop calling him Raf now that the adoption was weeks away from being finalized. He was still a bit uncomfortable with their pushing it but he had to admit the first time Noah called him Papí was one of the greatest feelings he'd ever felt. He still wasn't quite used to it though.

Noah grabs one of Barba's hands and places it on his tummy. He makes his tummy jump up and down under Barba's hand, "Es la niña!"

Barba laughs out loud, "Oye, Compay. You can't have a baby in your tummy, you're a boy."

Barba realizes immediately that he's made a mistake. Noah's bottom lip puffs out in an attempt not to cry, but when his lip starts to quiver the tears aren't far behind. Barba closes his eyes and sighs before pulling Noah close to try to comfort him, "Hey, buddy, I'm sorry- I didn't-"He's not even sure where to go from here.

Luckily, Liv has just gotten out of the shower and swoops in to save him. She comes and stands in the doorway, "What's the matter?"

Barba continues to hold a crying Noah and looks at her, lost, "I told him he couldn't have a baby in his tummy." He mouths to her 'Worst Dad EVER'

Olivia chuckles and steps into the room. She takes a seat on the edge of the bed and puts a comforting hand on Noah's back, "Hey Noah, it's OK. You know you else can't have a baby in their tummy?"

Noah looks at her from under Barba's arm- his crying has quieted but tears still stream down his face. He shakes his head.

"Daddy. He can't have a baby in his tummy either. But he still gets to be the Daddy. "

Noah considers Barba for a moment. "It makes you sad?"

Barba smiles at him, "No way, buddy, I like being your Dad. And I like being the new babies Dad, too."

Noah looks a bit skeptical at first, but concedes, "OK, I be a Daddy."

Barba and Liv both chuckle. "Alright, how about we finish finding out what happens to this boy and the tree?"

Liv snuggles in on the other side of Noah- and by the time Barba finishes reading- he's fast asleep.