set in season 9
She's nervous, so nervous. She doesn't really know why. She knows that he wants children with her, even after their separation last year. They've talked about it extensively, and he's said she only has to say the word.
Still, she waits until Alexis and Martha have retired for the night to seek him out. The small package that she's kept hidden in her purse she holds behind her back.
He's in his office, nursing a mug of eggnog and reading the manuscript that Black Pawn sent his way, wanting his opinion on the young author's potential. He's on his third read through, taking the time to type up notes of critique and encouragement.
Castle seems pretty engrossed, so she waits until he pauses his work to make herself known. He looks up when she clears her throat, marks his place in the manuscript, and beckons her over.
"Hi," she says softly, folding herself into his lap.
He kisses her, and she tastes chocolate and peppermint along with the eggnog. "Hi. You have perfect timing y'know."
She nuzzles into him. "Yeah?"
"Yeah," he says. "I was just about to finish up and come find you."
"Well, I have something to give you, and it, uh, couldn't wait," she says.
"Oooh, bucking tradition," he says, grinning. "Who are you, and what have you done with my wife?"
Kate giggles. "Evil twin, and I locked her in the storage room." She hands him the package, holds her breath as he opens it.
He rips the paper off quickly and frowns. "Kate?"
"This is your birth control," he says.
"Uh huh," she says. "Look inside."
He does, then looks back at her, still confused. "It's almost empty?"
Kate nods. "And I've decided that I'm not going to refill it once it's gone." She bites her lip and waits for him to catch on.
He does pretty quickly, his eyes widening. "Kate, does this mean what I think it does?"
"Yeah." She cups his cheeks, makes sure he's looking her in the eyes. "I want to start trying for a baby."
He kisses her, and she can feel the love and excitement rolling off of him in waves. She squeaks when he stands suddenly, carrying her into their bedroom.
He breaks the kiss just long enough to lay her down on the bed. She takes him by the tie, pulls him back in for a kiss. "I guess this means we're starting now."