They've been sending each other dirty text messages all day. Beckett could not help but laugh out loud at times and it went on for hours. So much so that Esposito stood in front of Beckett, arms crossed in front of his chest as he scowled, waiting for her to look up as she finished replying to Castle's latest text with a small smile on her face. "I know what you two are doing, and I gotta say Beckett, it's gross".

"What?", she rolls her eyes and turns away, but as soon as her back is turned, the smile returns to her lips and she could not ignore the moist brush of her center against her soaking panties. "Damn that man. 'I gotta finish a few chapters today babe'. My ass" she thinks, but the slow shake of her head and the affectionate little smile that she could not erase belied her true feelings. At that, she scrunched up her nose to hide her smile. It would be a cold day in hell before she admitted it, but she secretly felt giddy every time Castle called her babe. "Ugh", she huffs, and tries to focus on her paperwork.

At promptly 5pm, Kate's phone beeps and she reaches for it just as she saves the report she's been working on the last 2 hours. It's Castle. "Done for the day?" Kate's smile spreads slowly as she types,

"Just. Where are you?"

"Here. I've come to take you home"

She startles out of her seat just a bit in surprise, there's that smile again. She tries to school her features before she turns around to face him. She looks up and gives him the smile he knows is only for him. "Sneaky. I thought you were supposed to be writing?" "Couldn't wait for you to come home. I missed you." She couldn't help the flutter in her stomach at the barely restrained sweetness in his whisper, wanting his words to be heard only by her. Kate logs off and turns to him, "Ready if you are". At that, just like the dozens of times he got to do it for her, he gathers up her coat, holds it up for her, and as she adjusts her arms in the sleeves, he brushes his fingertips on the nape of her neck to gather her hair and gently pull it away from the confines of the collar of her coat. Kate tried in vain to suppress the shiver that ran down her spine.

Castle moves his face close to her ear, voice low, "Was that for me?", his warm breath fluffing her hair and he is rewarded by another slight shiver. Kate opens her lips to reply, but too late, he's moved away from her to shake hands with the boys, and is waving goodbye. She caught herself with her mouth open, she had no idea she was staring at him until she felt his hand on the small of her back, "Ready?", and promptly murmured "Mmhmm" giving him a small smile.

In the lift, they stood close together, knuckles brushing. He noticed that Kate was quiet and nudged her hand gently to catch her attention. "'Ok?", his voice gravelly and sent a fresh wave of wetness between Kate's thighs.

It was all Kate could do to stop herself from jumping Castle in the precinct lift, so she just looked down at the floor and nodded. He smirked and placed a hand on the base of her spine to urge her out as the elevator door swooshed open. "This is gonna be fun", he thought, as they made their way to the parking lot for the car.