Takes place the night before Sherlock's exile

Sherlock steps in the bedroom, slightly smirking at the view in front of him; Molly Hooper in bed obviously naked under the covers and softly snoring, Mycroft finally had granted his wish to see her because it's time that Molly knows about his feelings – that he Sherlock Holmes is in love with her. Over the years Molly had warmed his heart in a way he never thought it's possible, breaking the walls bit by bit he had raised around it. He must leave her again but this time he shows her that she is indeed the one who matters the most.

Time is precious so Sherlock quickly remove his clothes and joins her under the covers; his skin brushing softly against hers, making him shiver and his cock slightly twitching. He's watching her while she's sleeping, stroking softly her warm skin, scratching his nails over her back - giving her goose pimples all over her body. He slowly rocks his erection against her perfect bum, nuzzles his head in the crook of her neck and nibbles at her pulse point till a little shriek of pleasure escaping her and she's moaning his name; Sherlock took this a sign that she's awake and pays attention to his ministrations. He starts to kiss Molly's lips; gently flicking his tongue against hers, breathing heavily he move above her – laying on top and holding Molly close. She feel a large bulge against the bottom of her tummy, and it takes her a while to realise what it actually is, confused at first by its size. Sherlock starts to kiss her neck now, gently at first, then deeply with his tongue. Molly feels the bulge get even bigger and the sensations send shivers down her spine. Sherlock can hear that she's a little breathless in apprehension, his mouth moving upwards and nibbling at her ear. She leans into him, wrapping her legs against him, warm and safe, as he continues biting her earlobe. She feel his hand on hers, guiding it downwards, though without any force, until her fingers graze the soft skin of his shaft. Innocent Molly stifles a tiny gasp, and Sherlock wait patiently for her hand to begin exploring curiously. First she stroke up and down the entire length, whilst Sherlock continue to kiss and nibble at her ear. Next she wraps her tiny hand around it very gently – testing the thickness; and he can hear her gasp again, louder this time. Shocked? Intimidated? Exited? He's not sure but Sherlock whispers words of comfort in her ear. He moves his hand now, sliding down the side of Molly's body - past her exploring hand - and onto her inner thigh. He cautiously rubs the inside of her thigh before moving even further inwards and cupping between her legs warmly, Sherlock rub gently, watching Molly's reactions. Slowly he stroke the length of her smooth warmth centre, lightly at first, he notice that she's already wet and so he begin to tickle the opening very gently with one finger, probing the tiniest way in and out. He starts to enter his finger more and more, while kissing Molly's neck; he feels she become wetter, each finger slide becoming smoother and smoother despite being so tight. She moan into his neck as Sherlock continue to kiss her, her body aching against his fingers instinctively. While his hand continue, the other finds her chest, rubbing softly over her breasts. His lips move downward, kissing and nibbling at her soft skin, he can feel that Molly's nipples have hardened, Sherlock's finger moving a little quicker now, finding an in – and - out rhythm that matches her ragged breath. Molly's breathing becomes more rapid, chest moving up and down, still in rhythm to the moving of Sherlock's finger. His fingers traces down between her breasts, cupping them before squeezing both nipples perfectly, giving Molly the relief she needed – and yet leaving her to wanting more. Her hand on the back of his neck, pulls his head down onto her chest, his mouth latching to her nipple, he suckle gently at first, slowly getting harder and harder as Molly moan, Sherlock grazing it with his teeth as she close her eyes a little bit overwhelmed with the sensations. He removes his finger from her slit now, placing the very end of his cock at the opening and sliding in the heat gently, but no more. He continues to suckle at Molly's nipple hungrily until he feels her legs wrap around his back, trying to pull him further in. "I need you...", Sherlock hear her whimpers, sliding in slowly as their bodies sigh relief, fitting together perfectly. He slide in and out very gently, letting her become accustomed to the thickness and length; he suck her breast harder, pinching it between his teeth as his thrusting soon becomes quick, hungry for her cunt, "You feel so good... Molly" he moaned breathless. Sherlock pull his head away, now kneeling upwards with his back straight so he can admire the length of Molly's body still thrusting into her while he stored every little detail in his mind palace. She moan harder with each thrust, suggesting it's too much for her petite body to handle the sensations he gives her, but she just stare up at Sherlock, biting her bottom lip hard –rather than stopping him. Molly moving her hand down to her cunt, rubbing her clit with increasing speed, still moaning at how stretched she is. Sherlock speed up even faster, pummelling hard into her slit now all the way, as Molly dig her nails sharply into his back. Her body begins to rock, shaking more and more; and Sherlock knows exactly what is happening holding Molly close. "All mine..." Sherlock whispers, holding her lovingly as Molly start to cum on his thick cock still sliding in and out. Molly holds him tighter as he feels her cunt contract – coming, and forcing him to as well; Sherlock moan, shooting so much cum inside Molly's cunt that she can feel it, hot and warm. They lean into each other, their heads each on the others' neck; they lay together as one – Sherlock still inside her – resting and breathing heavily, "I love you Molly" he whispers in her ear, making her shiver again. Overwhelmed from the emotions a few tears streaming down Molly's face, "I love you too, Sherlock" He pulls out of her, bringing their bodies together under the covers, still kissing and softly stroking each other; both enjoying the sensations of the afterglow.

After a while Molly's emotions change; little sobs escaping her and Sherlock can see in her eyes that Molly knows exactly what's going on because like always she truly sees him. "You're leaving..." her shaken voice making his heart aching, "You know what I've done, Molly." Tears streaming down Molly's face and Sherlock hold her tight in his embrace comfort her till both drifting off to sleep.

It's early in the morning as Sherlock wakes up, feeling Molly's warm body snuggling beside him and a deep sadness making his whole body aching. Slowly he stands up; trying not to wake up Molly, because he can't handle a goodbye when she's awake. He dress quickly and put the letter he had written on her bedside table; a letter filled with all his emotions and love for her.

One last time he's looking at her, softly brushing over her cheek and hair and enjoying the feeling of her warm skin under his fingers. Taking a deep breath he whispers in the silence of the room "Goodbye Molly...", and then he leave.