A/N: Finally. The chapter we have all been waiting for.

DAY 13: Finally

In many societies, the number 13 was a bad omen. Even more so when it was paired with a Friday. In some countries however, Friday the 13th was considered a lucky day.

Friday morning, on the 13th day of their bet, Kate Beckett was aching with need. She was lying in bed, just inches from Rick's barely clad body and so desperate that it simply was too much to bear. She rolled to her side and watched his chest rise and fall in his sleep.

Despite the copious amounts of alcohol she had consumed last night, she was not hung over. Rick had seen to that. He had dragged her into a freezing shower, had toweled her off, forced a nightgown over her head and some pills down her throat, and pulled her to bed with him.

She slowly reached out her long fingers, but stopped mere millimeters from his face.

No, she wasn't going to lose this bet now, not after all that she'd put up with.

In fact, she was pretty sure that she could use her own desperation to win instead. Lanie had given her some ideas last night. It was time to finally end this battle of pride that was driving them both insane.

She rolled to her back and used hands and feet to push the covers to the foot of the bed. The hand that had reached for his face found her own breast. Her nipples hardened at the thought of what she was about to do and a pleased sigh fell from her lips. She made no attempt to suppress it – the whole purpose of this was to be loud.

Her other hand went to her hip, lazily dragging her nails up and down the sensitive skin. Brushing her nightgown out of the way, she rubbed her inner thighs together and hummed low in her throat, with purpose but genuine nonetheless.

Her left hand released her breast and slipped underneath the fabric. Soft fingertips made their way over supple skin and toned muscles, touching and caressing, heating and soothing.

She tweaked her nipple at the same time that her other hand brushed ever so lightly along her wet folds. Her back arched off the mattress and she moaned. Once, twice - partly from touching herself and partly from the exciting thrill of doing it with Rick at arm's length, still asleep but already stirring.

She gave herself time to fully enjoy her body, her skin more sensitive than usual because of her desperation, her aching need. Her breathing was slowly becoming shallow and her moans more and more uninhibited.

Her legs parted as she slicked her fingers with her own wetness and her knee nudged Rick's thigh.

The mewling sound she made when her wet fingertip pressed against her clit was high-pitched enough to cause him to stir beside her, making unintelligible sleepy sounds.

'Time to step up the game', Kate thought and shifted a little on the bed. Enjoying the cold air against her heated skin, she inched her gown up her body, raising her upper half off the sheet to divest completely of the garment. She threw it towards the end of the bed, where it slowly slipped to the floor.

Lying back down, she brought both hands up to cup and squeeze her breasts. Then, before her right trailed lower once more, she took her fingers into her mouth to sheen them with saliva.

When first one, then two of them slipped into her tight core, her eyes closed and her hips bucked into her touch.

Rick rolled to his side and wrapped an arm around her bare middle, the muscles of her abdomen flexing beneath his hand as she continued to pleasure herself.

Not much longer now, Kate thought and increased the speed of her fingers. Her breathing was ragged and her occasional cries loud and joyous. She could be completely silent at this if she had to, but now she made a point of being loud.

Kate's thumb flicked against her clit and her body shuddered. Rick's arm tightened around her and she angled her head to look at his face as he slowly woke up.

His eyes opened lazily and she could watch the dazed sleepiness turn into confusion, realization, then shock, and finally passion. Under his scrutinizing gaze she couldn't keep a light blush from spreading on her cheeks, but her fingers kept up their motion, steadily pumping into her body.

His hands were clenching the sheets, fighting a battle he was destined to lose, but kept on fighting anyway. Kate licked her suddenly dry lips.

She blinked and he was on top of her, stealing her breath with a hard and frustrated kiss.

The initial shock stilled her fingers deep inside her, both of her hands trapped between their bodies as his weight pressed her into the mattress. His tongue and teeth continued to feast on her mouth and she gladly gave him all she had to offer. Her muscles started to tremble around her fingers from the intensity of his kiss and his hands grabbed and clutched at her body as if she were his lifeline.

When they parted for breath, their gazes locked. The passion in her eyes was coupled with seduction. The lust and desperate need in his were proof of her success.

When he placed his forearms to the sides of her face and shifted his weight, she could feel his pulsing erection against her thigh. His pajama pants were all that separated their hot flesh.

Without conscious thought, Kate's fingers resumed their pumping, her thumb rubbing frantically against her clit, her body so close to the edge that she choked on her own breath.

His eyes went wide and he buried his face in her neck, his hips thrusting erratically at her thigh. She exploded around her own fingers, bucking and arching her back, screaming out her release, whimpering and quivering as the tremors shook her body. Her fingers slipped out of her and fell limply to her side as she continued to shake with one of the strongest orgasms she had ever had.

Rick used her moment of dazed bliss to push his pants down to his knees. Before she could realize what was happening, he had rammed himself into her, filling and stretching her in the most delicious way. She gasped and shuddered violently, her internal muscles squeezing him tightly as aftermaths wrecked her body.

He didn't give her time to adjust or come down from her high, setting a hard and fast pace that had them moving up the bed with each strong thrust. This time she came with his name on her lips and him right there with her.

A/N: No, this is not the end. There is more gratuitous smut coming your way! Yay!
So…did you like it? Did it disappoint you? Did it make you blush? Did you think it was just meh? Why? Tell me! I want to know!