I Want to Grow Old with You

By: muaaimoi

xXx

It's just another day.

And yet another argument with Sheldon. The guys have gone ahead to the movie theater; the timing and placing of the movies have once again earned them a Sheldon free outing. Penny had been invited to come along.

It had pretty much been established that she wouldn't when she hadn't even heard the door shut.

They are having a stare down when Penny realizes something is very wrong.

She had shifted her weight to her right leg when she felt it. And promptly forgotten whatever it was they had been arguing about.

She hadn't even noticed beforehand. Far too busy crossing her arms, and glaring back at Sheldon. She wishes she was that oblivious now. Usually when she argues with Sheldon he has her full attention. Her eyes are far too busy drinking in six feet something of angry Texan genius to bother with anything else. And her rage with Sheldon has always been all consuming. Visceral, really.

As much as Sheldon has all of her attention when they argue, she has all of his as well. And a genius's full attention is nothing to sneeze at. Sheldon's eyes bore into her, the entirety of his big beautiful mind takes a break from figuring out the mysteries of the universe and focus on her. Penny, the waitress from Omaha, Nebraska. The actress wanna-be who has yet to be good enough for any real part.

And when she fights with him, Penny becomes the sole object of his focus.

Sometimes Penny wonders if that's what being under a spotlight feels like. And some part of her has always been afraid to find out. It's much too tempting.

If sometimes she feels a little extra moisture when she gets home after, well… Penny has always had a healthy libido. It's not exactly something she has ever thought to attribute to fighting with Sheldon.

Except that now, there's no denying it. Because she can feel her body reacting. Her nipples are much harder than they should be, and that heat in her belly is definitely not all rage.

Penny flushes with shame. This is Sheldon, Amy's Sheldon. And here Penny was, lusting after her besties boyfriend, how skanky was that?

"Penny" Sheldon all but growls at her, his voice drooping into a baritone that Penny now realized she liked far too much. Just why did she have to start paying attention?

Penny tugs on her hair in frustration. This just can't be happening. Arguing with Sheldon doesn't get her hot. It doesn't! It's against the laws of the universe for her to find him attractive. No matter how cute she sometimes thought he was.

"Penny!" Sheldon growls again, and this time it can be called nothing but. He'd approached her at some point, probably when Penny was far too busy in her head, and he's far too close.

"What?" She snaps, stepping forward when all her working brain cells are screaming at her to step back.

Sheldon's eyes flash gloriously and Penny has a hard time remembering that she doesn't like him. She can't. He's Amy's, Amy's!

"Are you giving up?" Sheldon almost sounds insulted. As if Penny not fighting with him until her last breath was offensive.

"No way in hell!" Penny snarls, even if she can't quite remember what they had been fighting about.

They're almost nose to nose now, close enough that Penny can make out the ring of grey around Sheldon's iris. Much, much too close. She shouldn't be looking into his eyes like this. He's forbidden property. Amy's property.

"Good" Sheldon says softly, more a breath than anything else. And then he smirks at her. Slow, infuriating, and so fucking sexy. Penny could not be held responsible for her actions. She was sure Sheldon would have said he belonged to no one but himself, anyway.

xXx

Sheldon isn't prepared to have Penny kiss him.

Like most of the kisses he'd experienced thus far in life it was a surprise attack. Sheldon had been enjoying their argument, as was his habit, when Penny had paused.

He hadn't quite been able to classify what human emotion her widened eyes and quickened breath signified, but he had known it was pulling her attention away from the subject matter at hand. And that was inexcusable.

So he had taunted her. Sheldon thought he had gained the desired result when she had snarled at him. And next thing he knew Penny had seized his collar and fused their lips.

He can't quite help but freeze. Caught with his proverbial pants down. It was embarrassing, he doesn't know what to do. It's something that, no matter how many dreams he's had, he hasn't planned for.

But that doesn't mean he couldn't improvise.

It was a very pleasing experience. And definitely something worth working out. Not to mention working on.

Penny's lips were soft yet firm, and it was very clear who was kissing who. It was the only point Sheldon could find any contention with. So he decided to change it. Grasping Penny's cheek with his palm and holding her face still as he kissed her.

And that was much better.

Only Penny seemed to prefer it the other way around. Which led to a whole different kind of arguing. And one Sheldon truly thought he could really begin to prefer. Especially once his arms dropped to her waist and he leaned down, tilting his head for better access.

And then Penny's tongue moved in a way that was all sorts fascinating and Sheldon found it very hard to do any thinking at all. Dueling his tongue with her own in a way that had Sheldon gasping into her mouth.

It was all he could do to pull her towards him. Grasping her hips and losing himself in the sensation of having Penny give him her all.

xXx

Kissing Sheldon would have to go down as the most satisfying action of her life.

Ever.

The feeling of rightness, and blissful pleasure were almost second to a wave of sheer satisfaction at owning the crazy Physicist lips with her own.

Almost.

And that wasn't even touching on how hot it was. Penny feels impossibly wetter when he begins to kiss back. His hands on her hips are gripping with a strength she hadn't known he had. It was time to give up the goat, so to speak. Sheldon cooper was definitely turning her on.

And like most things Sheldon tried his hand at, he was good at it. He seemed to get better at kissing every passing second. Until Penny had to pull out all the tricks she had just to dominate the kiss. And she was still rapidly losing ground. With the way Sheldon was touching her, his hands skimming under her shirt.

One hand slipping into her shirt. Crawling teasingly slowly, past her stomach, then the bottom of her breasts, until Sheldon was out right groping her. Penny moaned in approval, bringing her own hands to grab at his surprisingly toned ass. Clearly walking four flights of stairs every day wasn't just good for her thighs.

Sheldon soon made the same discovery by slipping his other hand into her pants.

Penny groaned. Sheldon's large palms easily covered her ass cheek, and his long fingers dug deliciously into her flesh, brushed against her wet center.

"Oh" Sheldon whispered against her lips. His eyes were trained on her face, completely enraptured by her reaction. He slid his hand out of her pants. Fingers deftly making quick work of her button and zipper. Penny had no trouble shimming right out of them. And Sheldon had no problem cupping the whole of her pussy roughly. Rubbing at her clit with his fingertips before slipping his fingers inside her. And the new angle just felt so good.

"Sheldon" Penny gasped into his neck as he slid two of those long fingers inside her. Her knees buckled.

She hooked a leg around him. Wrapping her arms around his neck in a vain attempt to stay on her feet. All it did was bring her thigh into full contact with Sheldon's cock. Straining valiantly against his ugly plaid pants and emanating a heat Penny desperately craved inside her.

xXx

Penny was so incredibly wet. Sheldon knew it was a sign of her arousal. If he could manage any kind of focus he could have probably recalled much more on the subject. As it stood, with most of his blood focused on lengthening his phallus all he could really think was fascinating.

Every thrust of his fingers inside her elicited a sound that went straight to his groin. He had never been so hard in his life. And as Penny clutched at him and moaned decadently he became impossibly harder.

Penny was leaning heavily on him. And Sheldon's own knees were beginning to feel weak as he began to lose himself in Penny's wetness and heat. The need to sear that heat with his own pulsed with every heart beat. The need to be inside her was perfectly compelling. And the where didn't matter anywhere near as much as the how.

Sheldon lowered them to the ground. Willing himself to go slowly, lest he lose his rhythm as he finger fucked Penny. He had slipped three fingers inside her, and couldn't quite control himself any longer.

Penny looked up at him, a look of wanton desire on her face as she spread her thighs invitingly. It snapped what was left of his self restraint.

After, Sheldon wouldn't remember how he'd managed to rid himself of him pants, or his underwear. All he knew was that one moment is hand was buried between Penny's thighs, and then it was his cock.

It made everything worth it. The subdued desires. The late nights when he'd actually struggled to rest. The iron clad grip he'd had to put on his libido lest he become a drooling moron after Penny, like the rest of his friends. All of it was worth it.

All for the pleasure of it. Of slamming into Penny with abandon and having her meet his every thrust. Having Penny's nails dig gauges into his back as he gripped her hips hard enough to bruise. To have it all feel so unbelievably good…

It was better than solving any equation. The rightness of it, man to woman, lips to lips, Penny to Sheldon.

He lost all sense of time. The rest of Pasadena could have been invaded by zombies and Sheldon wouldn't have cared. An alternate version of himself with proof of string theory could have materialized right beside them and he wouldn't have noticed.

He didn't know what to call what they were doing. Not coitus, or sex or even fucking. But whatever it was, in the center of his living room, as he and Penny became one she was the complete center of his universe.

And he rather thought neither of them could argue with that.

xXx

So.. whadda ya think?