StupendousBoo made a comment in the review for "Riding out the Storm" that it was a little too short and perhaps not quite detailed enough. I agree; I really need to work on my descriptions. So, this is an exerecise in descriptive writing. We'll start with an alternate version of scenario #15 and next chapter will be a more descriptive scenario #16. I decided not to bother with scenario #17 - there was alot more going on in that scenario and I dion't really think I could have added more than a few touches.
I'm writing out of my comfort zone here.
Special thank you also to katherine temperance who answered my question. The "Visiting Grandma" revference was in Sex-Drive.

The room was illuminated by blue, occasionally punctuated by lightning as the two bodies moved in tandem. Water rattled against the window. Castle and Beckett's hearts pounded in response to each other; the contact of skin on skin; the smell of sweat, wet hair and arousal; the taste of flesh on each other's mouths - hers deliciously sweet, his tantalisingly salty and crisp - spurred on by the thunder, accelerating the rhythm of their pulses.

Castle immersed himself in every part of her, caressing, sucking and teasing every piece of flesh he could find; all the while moving inside of her, worshipping her with his tongue, teeth, lips, hands and - well, other parts as well. Every part of him. She already had his heart. She might as well take the rest, too.

He was all too willing to give it to her, and she was a very grateful and eager recipient, revelling in his every flavour, his every scent, his every touch - smooth and rough; wildly passionate and quietly reverent. She was done with doubts, done with questions - at least for tonight. Tonight there was nothing but him, her and the absolute certainty that this was the one.

No matter what happened after tonight, she would carry this memory with her forever, this memory of joining with him. He was the love of her life. She pulled him in tighter at the mere idea of this being the only night because - no, no, she would do whatever she could to make certain that it wasn't. It couldn't be. There was just too much - too much...

"Love," she gasped against his clavicle.

Castle paused in his tongue's exploration of her neck to look down at her.

"I love you Castle," she whispered.

Her face was full of emotions; of contentment, unbridled passion, ecstasy, relief, joy and - yes, maybe love, too. Maybe.

She kept whispering, now too quiet for him to hear. He lowered himself so that his ear was next to her cheek.

" - love you, I l love you, I love you - oh, so much - "

He groaned into her hair and moved to her mouth, plunging his tongue in deeply, his actions met with an appreciative sigh as he continued to move inside of her, with her. Now was not the time for thinking or second-guessing. He could do that in the morning. Right now, he was perfectly content believing her, that she was genuine, that they had a shot, that this was real.