"Tie me up."

Castle ordered her seriously, although he was raising his eyebrows comically and playing with the silk belt, tightening it and biting it in front of Kate's face.

They had left the bathtub abruptly, without drying their wet bodies and had jumped on the king bed ready to do battle in a more comfortable spot.

Beckett smiled watching him doing foolish things, as usual he wanted to 'play' with her.

"Let me guess: you have a trauma with being tied up, don't you?" Kate said kidding him.

"Yes, a big one... down here" he said looking his crotch.

Kate smiled and jump on Castle to kiss him passionately because he could not hold back herself when he was so cute. It was difficult to grab their wet bodies so it was more exciting. She hugged him strongly with her fingers pressing his back and their legs twined complicatedly.

When their mouths were explored deeply their minds immediately thought in another part of their anatomy. Kate moved her lips to kiss his chin and neck. Castle, with his mouth free now, talked again:

"Tie me up... please..."

Beckett stopped kissing and looked at his eyes. Rick offered her the white silk belt and she took it. Then Castle put his wrists together in front of Kate's face like waiting to be cuffed. He had removed the bandages before the bath. The detective observed the bruises caused by string rubbing still visible, then she leaned and kissed their wrists sweetly.

"Are you sure?" she whispered looking at his eyes.

He smiled and nodded. Of course this was not the first time they play this game, but after what happened her feelings about bondage were... conflicting. Beckett started to do it, but when she began to bandage one of his wrists, she stopped and sighed.

"I can't do it, babe." Kate said crestfallen.

Castle realized in that moment how much Kate had suffered with his kidnapping. Beckett was strong but maybe she needed this 'therapy' more than him.

"Kate..." she lifted her head and looked at his eyes.

"Don't think about tie up literally, it's like... a metaphor of how I had lived these last years before we were together..." Her eyes changed from sad to tender "... when I worked closely you but I couldn't touch you..." Rick caressed her back with his fingertips.

When Castle's fingers ended her back, they continued along her curves until reaching inhospitable areas. Kate breathed deeply when he caressed very softly her most intimate parts. He whispered in her ear:

"You couldn't be mine, Kate, and that drove me crazy. Did you feel the same for me?"

With a gentle movement Rick made her lie face up and licked her wet breasts avoiding her nipples, which grown and harden waiting for his tongue. It never came. Now she was the one who was going crazy.

"I want to feel that madness again... Kate..." Now Castle caught a nipple between his lips and Kate moaned.

Then the writer, knowing that he was the 'word master', stopped and offered the white silk belt to her again. Now Beckett will tie him up, eager to unleash their mutual craziness.

"I think I could untie me" Castle said moving his wrists. Kate had done an expert knot.

She crawled on all fours over him and checked the silk belt joining him to the headboard of the bed.

"You're perfectly ti.."

Kate run out of words when felt his lips playing with her inner thigh and sighed gently when Rick moved his head until being dangerously close her sex. She was tented to move a little so he could...

"No!" she said with determination.

The writer smiled playful looking at her chests moving quickly. Beckett, breathing heavily, put her face in front of his face and kept her mouth very close to his lips, without touching.

"You're tied so I'm the boss here." she said with authority.

Then she made the gesture to kiss him but she moved her head back again. Castle was about to complain but he preferred to give her his 'puppy eyes' look, and Kate responded to him with a bad-girl smile.

Kate sit astride on his chest, offering him a spectacular view of her breasts. Then moved her hands gracefully up to her head and removed the three hairpins, still keeping his hair in a bun, one by one. And one by one she placed them between Rick's lips, and warned him sensually:

"If you open your mouth and they all fell... I'll go letting you 'unfinished'."

Castle pressed his lips obediently and kept his mouth shut, raised an eyebrow, and waited worried and excited thinking if Kate really would be able to leave him there tied, alone and with an epic erection.

The detective made a little jump back and sit in his stomach. Rick exhaled and a hairpin flew away. He put an innocent face immediately and looked at her eyes.

"So quick?" she said joking.

Kate moved a little further back until Rick could feel his erection rubbing her buttocks. She leaned forward and stroked his chest with energy, then licked and played with his nipples until the detective heard Castle pronounced a funny 'mMMMMmmmmMMMmmhhh' as response. Then Beckett tickled him touching his ribs very gently.

Another hairpin flew away. He looked at her worried, she looked him back bossy. One more hairpin and 'game over'. Kate made a move to stand up. Rick shook his head to say 'no' and pointed with his eyes the hairpin still in his mouth.

Beckett smiled, bit her lower lip and before sit again she used one hand to slide the 'needy' Castle's erection inside her. The sigh of pleasure the detective uttered was accompanied by a 'MmMmMmMmhhh' from Rick, keeping his hairpin in his mouth like a hero.

Author's note: Feel free to correct my grammar or weird words. I'm lost with sexual metaphors and double meanings. Hehehe.