Castle laughs in his office and Kate narrows her eyes as she leaves the finished dishes behind and walks towards her fiancé. The second she comes into the office he looks up to see her and just… grins big at her.

"What's so funny?" she asks and he looks to his computer again and scoffs another laugh.

He waves his hand to her to insist she'll come and see for herself. He doesn't need to tell her twice. When she's standing behind him she sees the photo he's looking at. It's two polar bears, one of the two biting the other one's ear while the other one looks quite unbothered by it.

"That's you and me," he laughs and she feels her forehead wrinkle.

"What?"

He laughs some more, perhaps a bit at her reaction, before he's able to explain himself.

"When I nibble at your ear you always try to look so unbothered by it that it's sometimes so hard not to find it amusing." She growls at that, which apparently only makes it even more fun.

"I don't do that," she says and he turns with his chair to pull her onto his lap.

"Yes you do, you don't notice it yourself but I've seen it, in the mirror, when I'm behind you and nibble your ear. It's first when I reach your neck that you can't stop the moan anymore," he says and she can't help but feel the arousal increase at the reminder of how it feels to have him stand behind her with his lips attached to her skin.

"No, I'd know," she insists and shudders when she feels his lips start nibbling at her ear. Her whole body relaxes into him in his lap and she closes her eyes as she tries not to move.

His lips move behind her ear, kissing her skin there and she feels her inside shiver with anticipation.

"Look," he suddenly whispers behind her ear and she opens her eyes to see he's opened the camera on the laptop to show she does indeed look like she's doing her best to look unbothered.

"Damn you," she murmurs and he chuckles, though before she can pull away or anything his lips kiss down her neck and starts sucking on her skin, which immediately pulls a string of moans out of her lips as her eyes shut closed again.

She leans her head back a bit to open up her neck for him as he continues the wonderful assault on her skin. Damn she's going to give him hell tomorrow if she wakes to see hickies, but right now it's not something she's worried about. She loves having his lips and his tongue all over her, especially on her neck. He sucks at that spot he found the first night they were together and it makes her gasp.

"Castle," she moans and his hand slowly tracks his fingers over her thighs, making sure she can feel them.

She opens her legs without hesitation, it's almost as if she's doing it automatically without thinking. When his hand takes a detour she groans a little right before it takes the path in under her shirt. His fingertips tickle against her skin as he lets his fingers stroke her naked belly under her shirt and she can't help but squirm in his lap which to her satisfaction drawls a moan out of his mouth. She starts grinding more and his hand splays out on her belly to pull her closer to him. The things they do to each other has always amazed her, even from that first night together she knew he ruined her for others, just like she imagines she ruined him too. The way he can make her squirm and turn her on is much more intense than any other guy she'd ever been with. And this time is no different, it might have started at his desk but by the time their limbs are all sore and weak they're tangled on the bed in a panting knot. Both too exhausted to untangle, besides, they enjoy being this close, even if they're all sweaty.

"See, I told you you make that face," he pants out into the room and she groans. "I gotta admit it's adorable, I love how you try to act all unbothered especially when we're around people."

"Yeah, well, at least I'm doing a better job at hiding it than you are," she smirks as she looks up at him and sees his smug smile.

"That you are," he leans down to kiss the top of her head and she hums. "I love you."

"Love you too," she says as she snuggles, if that's even possible, closer to him.

The end