.

The Cooper Substitution Reaction.

Chapter 3.

In that dreamy, halfway state between sleep and awake, Sheldon felt a wonderful, soft, warm feeling against his stomach and chest.

Inhaling through his nose, his eyes still shut, he smelt cherries and instantly began to harden, his arousal nudging against the bottom of the wonderfully gentle, comforting body, which was pressing against him. For a moment he considered pulling away, but then he heard the most beautiful moan, and he relaxed, tightening his grip a little around Amy's waist.

Feeling her push back against him, he delicately stroked the tips of his fingers across her stomach, inscribing circles on her flesh, through the fabric of her pajamas, causing Amy to moan again.

Summoning his courage, he slipped his hand down, and gently stroked her folds though the material, causing Amy to stiffen instantly and inhale sharply.

Sheldon rushed to apologize, "I'm sorry, but you did say I could touch you".

"It's OK" she reassured him, craning her head to look at him over her shoulder, her breathing steadying "it was just a bit of shock to wake up like that". With a smile, she offered "please continue".

For a moment he continued to stroke her, before his hand left her and she gave a frustrated sigh, then she felt him tug at her pajama tie cord, and his hand was inside her pajama bottoms, stroking the silky hair at the top of her pelvis.

Letting out a strangled "hoo", her breathing a series of gasps, she asked "are you sure want to do this?"

She felt him nod against her neck, then he murmured "yes" into her hair. "Please Amy" he moaned through labored breathing, "let me do this for you".

Stifling another "hoo", Amy agreed "Oh God, yes" and, in an instant, Sheldon's fingers grazed her naked folds, then he stroked her, and she almost came.

Stroking back and forth along her moist lips, he teased his index and middle fingers between them, feeling the hot, damp flesh beneath, then he pressed inward, seeking entry. Amy gasped, biting her bottom lip, and guided him "a little lower Sheldon".

Sliding his fingers about an inch lower, Amy felt them slip into her and slide against her slippery, wet walls, her breathing hitching in her throat, then he began stoking in and out, slowly and gently.

Feeling her body begin to twitch and writhe against him, he speeded up the strokes, all the while growing harder, Amy pushing herself back against him, feeling him nudging her, her moans driving his arousal to a painful level.

On and on he stroked, pushing deeper and deeper, until the full length of his fingers were plunging into her, Amy's breathing getting faster by the moment, until he felt her walls tighten around his fingers, her back arching, her head pushing back against his chest.

They lay there for many seconds, Amy holding her breath, gently twitching against him, then she let out her breath and gasped in another lungful.

"Oh God Sheldon" she gasped, "that was incredible".

Sheldon lay there, still spooning her, his fingers gently stroking her folds, then he drew his hand from her pajama bottoms, holding it in front of his face, marveling at her glistening wetness on them. "Amy" he asked timidly, "what do you taste like?"

Looking over her shoulder, she looked at Sheldon's eyes, unblinking, staring intensely at his fingers. "I don't know" she said, blushing slightly at what she was about to admit to, "I can't describe it, but it's not unpleasant".

Sheldon lay quite still, his mouth half open, his eyes fixed on his fingers, then he put out his tongue and flicked it against the tip of his index finger. For a moment he savored the taste, then a smile grew onto his face and he put his finger in his mouth and licked Amy's wetness from it. A look of rapture on his face, he declared "that's delicious".

Rolling to face him, Amy pressed her lips to his, her tongue briefly pressing for entry, then they were stroking tongues, Sheldon's hands around her back, his hardness pressing into her, Amy's hands around his neck pulling him against her, deepening the kiss, then she felt him fiddling with the buttons on her pajamas, and his hand was inside them, cupping her left breast, his thumb grazing her nipple, which hardened under his touch, then Sheldon's body stiffened and she felt him pulse.

He lay there for a few moments, then he relaxed against her, kissing her gently on the mouth.

Sitting at the kitchen counter, eating pancakes and drinking tea, Amy smiled at Sheldon, "what do you fancy doing today?"

Sheldon ventured "going back to bed?"

"OK" Amy confirmed, "I'll do you a deal. a couple more hours in bed, but, after that, I'd rather like to spend some of today outside, in the sunshine".

Glancing at the clock, Sheldon announced "It's almost nine o'clock. How about we get up at eleven?"

Amy glanced at the wall for a moment, as though thinking it through, then she grinned "deal".

Slipping back into bed, Sheldon used his index finger to push aside her half undone pajama jacket, exposing her left breast, Amy blushing pink, then he undid the remaining two buttons, to stare at her bare breasts, then he leaned his head in and gently kissed her left nipple.

Feeling his lips encircle her nipple, Amy stiffened, a deep sensual moan rising up from her throat, her loins twisting and throbbing inside her.

Hearing her moan, Sheldon sucked hard on her nipple, then he grazed his fingers across her right nipple, before pinching it between his index finger and thumb, Amy teetering on the edge.

Letting her nipple slip from his mouth, he flicked his tongue across it, and Amy was over edge, plunging into a shuddering climax, that seemed to engulf her entire body.

Sheldon lay there, a look of rapt delight on his face, staring at Amy, laying on her back, her naked breasts heaving with each labored breath, then he leaned over to press his lips to the flesh between her breasts, inhaling her exquisite scent, tasting the warm softness of her skin, then he trailed tiny kisses down her stomach, until his lips grazed the waistband of her pajama bottoms, where he stopped. Raising his head, to look into her beautiful face, the smile slipping from his lips, he apologized, "I'm sorry Amy, I can't that".

Grazing her fingertips across the upper mounds of her own breasts, she assured him "It's OK Sheldon, what you've done for me has been amazing, incredible, mind blowing. More than I ever dreamed possible".

-o-o-o-o-

Drifting through Glendale park, they paused under a tree, savoring the coolness provided by the leaves. Taking his hand, stroking the back of it with her thumb, Amy told him, "Sheldon, I can't tell you how much I appreciate, how much you've done for me, these last few days".

With a shrug of his shoulders, a smile creeping onto his lips, he asked "You don't think I'm enjoying it?"

"Really" she asked, "you've not been uncomfortable or nervous?"

"Oh I've been both" he admitted, a nervous grin on his face, "and terrified, but the rewards of persevering have been worth it. You are incredibly beautiful, and you feel and taste and smell divine".

Realizing what he'd just said, he blushed, coughed and asked "Shall we move on?" Nodding, Amy set off slowly, in no great hurry, Sheldon pausing to consider what he'd just admitted to, then, catching her up, he caught the fingers of her left hand, and joined hands with hers.

Hand in hand, they wandered through the park, heading in no particular direction, until they recognized a couple heading toward them. With a sly grin, Penny announced "I see you two finally got out of bed".

Rolling his eyes, Sheldon announced "Not everyone is as sex mad as you two, you know".

"So, you two were up at the crack of dawn, where you?" Penny teased. The furtive glance, and the blush, was all the answer she needed, and she grinned knowingly at them.

Gesturing for them to sit at a table, in front of an ice cream stall, Sheldon took their order, and he and Leonard went to the counter, to get ice cream and cold drinks.

As soon as they were out of earshot, Amy lowered her voice and said "Penny, I need to talk to you, in private, as soon as possible".

Looking concerned, Penny asked "Problems?" Rubbing her chin, Amy bit her lip and replied "Kind of".

"As soon as the guys get back" Penny suggested, "we're going to the bathroom".

Checking the stalls, to confirm they were alone, Penny asked what the problem was.

Looking sheepish, Amy admitted "intimacy".

"Sheldon not putting out?" Penny asked, with a sad, consoling look.

"On the contrary" Amy assured her, "Sheldon's been brilliant. He's taken to it like a duck to water". Swallowing, Amy continued "It's me. I lie there like a stunned gazelle".

Penny thought for a moment. "Any complaints from Sheldon?"

"Not yet" Amy confirmed, tilting her head, "but he's bound to realize, sooner or later, that he's doing all the work". Looking desperate, lowering her voice, Amy asked "What do I do Penny?"

Musing for a moment, Penny suggested "Suck his nipples. Guys love that". With a glint in her eye, she went on "and if that doesn't work, suck something else".

Flinching, Amy gave a bashful grin and confessed "I don't think I could do that, you know, suck his 'something else' ".

Shaking her head, Penny asked "Wasn't this your idea? You know, intimacy?". "Yes it was" Amy confirmed, "but Sheldon's going too fast for me. I do love him, but I'm out of my depth here".

Penny gave her a reassuring smile, then she advised "Amy, it's your body, so you, and only you, have the right to decide what happens to it".

"I know" Amy replied, grimacing, "but this is the chance to get what I've dreamt of for years. If I say no, I might not get another chance".

"That's the choice you've got to make" Penny informed her, shrugging again, "but only you can make that decision. I can't make it for you".

Taking another spoonful of ice cream, Sheldon glanced across at the toilet block. Rolling his eyes, he asked "Why do women always take so long to void their bladders, and why do they never go alone?"

Giving him a knowing look, Leonard advised "I find it best not to wonder about such things". Noticing a distant look on Sheldon's face, he asked "You OK? You look troubled".

"To he honest" Sheldon began, "I am". His voice dropping, he leaned in conspiratorially, and confessed "I think Amy might be frustrated, at the speed of our relationship". Seeing the questioning look on Leonard's face, he continued "Amy just lies there while we kiss and …..". Blushing, he cleared his throat, then mumbled "and other stuff".

"So speed it up a bit" Leonard suggested. With a smile, he explained, "There's no fixed rate of progress. With me and Penny, sex took two years, or three dates, depending on your preferred method of recording time".

"So you think I should now have coitus with Amy?"

Realizing the responsibility Sheldon was putting on him, Leonard carefully considered his reply. "I didn't say that" he cautioned, "only you can decide when the time is right".

Sheldon sat there, idly playing with the plastic spoon in his empty ice cream tub, then he announced "I'm going to do it, tonight".

-o-o-o-o-

Sipping her wine, Penny gave Leonard a sideways stare, trying to decipher his smug look.

"OK" she asked, What is it? What are you grinning at?"

Leonard tried to act innocent, but Penny fixed him with a stare, and he broke. "Sheldon and Amy are having sex tonight".

"What?" Penny exclaimed, her voice rising "how do you know?"

"Sheldon told me" he replied, grinning again, "apparently Amy's frustrated at the slow speed of their progress, so Sheldon's going for it, tonight".

Putting her hand to her forehead, Penny cringed, "It's going too fast for Amy, not too slow".

Leonard looked confused, then Penny went on, "Amy told me today. Sheldon's already miles ahead of her. She asked me for advice, on ways to pleasure Sheldon".

Closing his eyes and screwing up his face, Leonard cringed and murmured "Oops".

-o-o-o-o-

Putting his cup down on the coffee table, Sheldon gave Amy a long, considered look, then asked "Ready for bed?"

With a smile, she confirmed "Yes. Go get a shower, while I tidy up".

Fighting to keep his breathing under control, Sheldon suggested "You could leave that till morning". Swallowing, he continued, "and join me in the shower?"

"Really?" she asked, raising her eyebrows, "You would be OK with that?"

By way of an answer, he took her by the hand, lifted her from the couch, and led her out of the door, along the hallway, and into the bedroom. Sitting her on the edge of the bed, he lowering himself to sit beside her.

For a moment, they looked at one another, then Sheldon drew his T-Shirt over his head. With a shrug, Amy followed suit, unbuttoning and shedding her shirt, then undoing the clasp at the front of her bra. She drew the cups apart, to let the perfectly smooth orbs of flesh swing free. Taking a slow, deep breath, she asked "Would you undress me Sheldon?"

Sheldon gave her a longing look, his eyes dark with desire, then, without a word, he settled onto his knees in front of her, and unzipped the zipper at the side of her skirt, Amy's eyes following every movement, noticing that his hands were steady, with not a hint of a shake or tremble.

For some reason, which she couldn't fathom, Sheldon's confidence made her even more nervous, and she visibly trembled. Lifting her bottom a few inches from the bed, she felt her skirt slip down and drop to the floor, followed a second later by her panties.

She sat there, naked, feeling more exposed and vulnerable than she'd felt in her entire life.

Noticing the trembling, Sheldon asked "Are you OK?" "I'm fine" she lied, smiling, "just a little chilly. Let's hurry up and get under the hot water".

Getting to his feet, Sheldon hurriedly unbuttoned his pants, dropped them to the floor, and stepped out of them. Looking up, she surveyed the muscled chest and arms, of the giant of a man standing before her, then she lowered her face, to stare at the large bulge, almost level with her face, clearly showing through his white underpants.

Pulling his underpants down, Sheldon bent forward and stepped out of them, then stood up again, to stand a couple of steps from Amy, who couldn't tear her eyes from his rock hard arousal.

Fighting to control the well of fear in the pit of her stomach, she got to her feet and, with a forced smile, followed him into the hallway, then into the bathroom, and finally into the shower.

Standing under the hot water spray, she felt a little of the nervousness abate, then she watched Sheldon fill his hands with Shampoo, and, moving behind her, massage the shampoo into her hair.

With Sheldon standing behind her, she managed to relax a bit more, feeling his strong but gentle fingers entwined in her hair. When the shampoo was rinsed from her hair, he squeezed shower gel onto a sponge, and, with long, gentle, sweeping strokes, washed her back, then her arms, before gently turning her to face him. Starting at her groin, he slowly and meticulously studied her body, his eyes scanning her every pore, the image of each square inch of her perfect skin, stored in his eidetic memory.

Inch by inch, his eyes scanned upward, across her stomach, over her shiny wet breasts, drips of water falling from her rough, dark nipples, then to her throat, onward to her chin, and finally to her face, which, the instant before he saw it, bore a look of trepidation, which Amy, just in time, switched to a broad, welcoming smile.

Taking the sponge from him, she rinsed it and applied more shower gel, then she slowly washed him, starting with his tautly muscled arms, then his firm chest, and down to his stomach, before glancing at his face for reassurance, and, having read it in his eyes, took him in her hand and sponged his length. Giving a moan, he reassured her "Oh yes".

Sitting on the edge of the bed, Amy could feel the gentle caress of the warm, fluffy, scented towel, across her back, as Sheldon knelt behind her, drying her. Once in a while, his hardness would graze her back, and she would tense. She wanted to tell him she wasn't ready, but how could she? After all he'd done for her, putting aside his own fears, how could she disappoint him? How could she tell him no?

She was so distracted with her thoughts, she didn't realize he'd stopped drying her, until she felt the kiss on her neck, and Sheldon's hands stroke her stomach, then cup her breasts. She tried not to say it, but the words slipped from her mouth, "Sheldon no". The true gentleman that he was, he stopped the instant she spoke. He knelt behind her, frozen still, his hands still cupping her breasts.

Crawling around beside her, he slipped his legs over the edge of the bed, to sit alongside her. Looking into her eyes, he asked "Amy, what's wrong?"

Trembling, she stared at her feet, then she replied, her voice as steady as she could make it, "I'm sorry Sheldon, but I can't. I'm frightened".

Taking her hand, Sheldon stroked his thumb across the back of it, and assured her "It's OK Amy. Whenever you're ready". Sheldon looked at her, and she looked smaller than usual, timid. He asked "Would you like me to leave?" Amy smiled for a moment, then the smile slipped from her lips, and she murmured "Please".

Taking the towel from behind her, he placed it across her lap, then stood from the bed, and stepped into his underpants, then his pants. Taking his T-Shirt from the dresser, he slipped it over his head, then knelt in front of Amy.

She held his gaze for a moment, then, closing her eyes, she said "I'm sorry Sheldon, I'm so sorry".

"Shush" he whispered, "It's OK. You've waited for me, now I'll wait for you, because you're worth it. Just tell me when you're ready, OK?"

Swallowing down the lump in her throat, in a whisper, she replied "OK, I'll call you tomorrow".

Pausing in the doorway, Sheldon called "Amy, I love you", then he was out of the room, and a few second's later, she heard the front door click shut.

-o-o-o-o-

Leonard slept through the opening of the front door, but Penny, being only half asleep, heard it. Glancing at the clock, she noticed the time was just approaching midnight. Slipping from under the covers, she let herself out of the bedroom, and padded, barefoot into the living room, where Sheldon was sitting in his spot, staring at the blank TV screen.

Sitting next to him, she briefly studied his face, then asked "You're home early. Problems?"

"Kind of" he replied. Glancing at Penny, sitting there in just bra and panties, a sad cadence to his voice, he explained "She said no. She said she wasn't ready".

Giving him a consoling smile, she simply said "Oh". A few seconds passed, then Penny asked "What are you going to do?"

"I'll wait for her, of course" Sheldon confirmed, "because she's worth waiting for. I'll wait for ever, if I have to". His eyes dampened, and he wiped them with his sleeve.

Stroking his arm, she said "Well, good for you. Maybe you should get some sleep?" Shrugging, he replied "You're probably right. There's nothing more I can do tonight".

Leaning toward him, she gave him a peck on the cheek. "You two will be OK" she assured him, "I know you will".

-o-o-o-o-

Try as she might, Amy couldn't sleep. Not only was she rerunning the events of the evening in her mind, but, frightened and nervous as she had been, she'd also been aroused, and the heavy, wet feeling, deep in her loins, was still there. She'd tried thinking of something else, but the feeling was a stubborn one, like a song you couldn't stop yourself singing in your head.

The minutes crawled by and, after checking the clock five times in under fifteen minutes, she kicked back the covers and dragged herself from the bed.

Sitting at the dining table, sipping a cup of tea, she wriggled in her chair, trying to get comfortable, but the feeling of frustration was still there.

Glancing toward the kitchen, her eyes settled on the cupboard under the sink, then she stood up, made her way into the kitchen area, opened the cupboard, and took out a black plastic carrier bag.

Sitting on her bed, she upended the bag, and tipped the contents onto the bed. Picking it up, she glanced around the room, as though to confirm she was alone, then she stroked her hand down the length of it, feeling the molded veins.

Putting her left hand flat on her chest, she took a deep breath, then opened her bedside cabinet, and took out a plastic bottle. Flipping open the cap, she drizzled the lubricant onto the mushroom shaped head of it.

Propping herself against two pillows, so she could look at her own lap without lifting her head, she pulled the cord on her pajama bottoms, and slipped them down below her knees.

Remembering Penny's advice, she gave the bottle a hard squeeze, squirting about a third of the bottle into her hand, then smeared it on her folds, pushing her fingers into her, to lubricate herself.

Wiping the excess gel from her hands, onto her pajama top, she held the silicone with both hands, about halfway down the ten inches, the head pointing toward her.

Spreading her legs, she pressed the mushroom head against herself, paused, silently counted one-two-three and, with a sharp jerk of her hands, pushed the head past her swollen lips. With a gasp, she cursed under her breath "Shit, that's big".

She lay there, crazy questions running though her mind, "What if it gets stuck?", "what if Sheldon walks in and catches me?", "what if I have a heart attack, and the police find me like this?". With the way her heart was pounding, the last one was beginning to seem like a real possibility.

Gradually becoming accustomed to it, she pushed it a little further in, feeling it separating her walls. She fought to relax, willing herself not to clench up, then she pushed it in a little further, and further still, until her hands were against her. Sweat was beading on her forehead, and her cheeks burned with nervous embarrassment. Even though she was all alone, she still felt what she was doing was wrong, but a thrill of guilty excitement ran through her, encouraging her onward.

It felt huge inside her, as though it were tearing her in two, but she'd gone too far to stop. She knew that if she didn't go through with it, she wouldn't sleep a wink all night.

The seconds turned into a minute, perhaps even two, then she pulled it out, the soft but, at the same time hard, mushroom shaped head raking her walls, a muffled groan rising from her throat, then she pushed it in again, then pulled it out, a slow rhythm building, each stroke feeling less uncomfortable.

Wiping the sweat from her bow, with the arm of her pajama top, Amy paused. "There has to be a better way" she thought, then an idea came to her. Tucking her legs under her, she rolled up onto her knees, and the dildo caught on the mattress. Amy cursed "OH FUCK", as it was suddenly driven several more inches into her. "Oh well" she thought, "that's one way to get it in".

Grasping it with her right hand, she held the bottom of it against the mattress, and began to raise and lower herself on it, the fear and discomfort gradually being replaced with a twisting, tightening knot in her loins.

She needed a mental image, and what better one she thought, than Sheldon, standing naked in front of her, his erection almost as large as the silicone one she was currently riding. Eyes clamped shut, focusing on nothing but the image of Sheldon, she rode the ten inches of hardness, feeling it slide against her hot, slippery walls, creeping closer, second by second, to her ultimate goal.

Trembling on the edge, she arched her back and drove herself all the way down onto it, feeling it nudge something deep inside her, and she was over the edge, her walls clamping around it, the tight knot unrolling through her body, every nerve feeling as though it had shattered.

With an animalistic growl, she collapsed back onto the mattress, bumping her head against the, fortunately padded headboard, her heart thumping as though it were about burst from her chest, her breasts heaving as she gasped in air.

Amy lay there for ages, her heart racing, breathing like she'd run a marathon. When her breathing finally slowed, she eased the length of silicone from inside her, and, recalling what Sheldon had said about doing herself some damage, carefully examined it for signs of blood.

Satisfying herself there wasn't any, she dropped it into the drawer of the bedside cabinet, pushed the drawer shut and, feeling the guilt pushing its way back into her mind, rolled on her side, to face away from the cabinet.

She lay there, trying to clear her mind, but she was haunted with guilt. Had she, she wondered, in some way, betrayed Sheldon?

Finally, some time in the middle of the night, exhaustion overtook her, and she slipped into a deep sleep.