I Want to Grow Old with You

By: muaaimoi

xXx

It's too soon when she finds herself alone with Sheldon yet again.

"So..." Penny ventures, she's never done terribly well with silence." How do you think Leonard and Amy are doing at the wedding?"

She doesn't know what she's doing.

She's just bored really, and maybe the tiniest bit lonely. It's like she can never find much to do with herself in her off time lately. So she had found herself in the guy's apartment. And she wasn't quite up to leaving just yet. So what if Sheldon looked stupid, wearing a train conductor hat? And that she feels dumber just watching him. It's not late enough for a bottle of wine quite yet. And she had been starting early just a bit too often lately.

But seriously, what grown man likes model trains so much?

"Penny, please desist in attempting to engage me in conversation. I am much too busy having fun."

Sheldon that's who, Penny thinks. And she can't quite wipe the incredulous look from her face." What's so fun about model trains?"

Penny knows better than to ask. But she wouldn't be Penny if she could help herself. Bad impulse control was one of her strongest character traits. It had her voluntarily sharing space with Sheldon didn't it?

"I believe the best answer to your question would be; what about model trains isn't fun?"

She shakes her head, all fond exasperation and not a little amusement. Really, only Sheldon could get away with something like that.

Of course he ruins the moment by rambling on, oblivious there had been one in the first place.

"A truly perplexing question would be what you find so appealing about Hello Kitty."

And he did not just go there.

Quite suddenly it's on, like Donkey Kong. And if Penny has another flash back to her grams and her grandfather arguing over the color of their drapes, well... It's been happening so often lately it's gotten a lot easier to ignore.

xXx

Its twelve minutes into the argument that Sheldon realizes that he's enjoying it.

It shouldn't be that surprising. Sheldon has always enjoyed arguing. There was always something very satisfying about crushing another's logic with the sheer superiority of his own.

But with Penny, there is no logic to be found, let alone crush.

It's a battle of wills he doesn't engage in with anyone else. He doesn't always manage to win, but paradoxically, this makes it all the more appealing. There is an added thrill of uncertainty that all his other social interactions lack.

They don't even fight that often. Or at least, nowhere near often enough in Sheldon's not quite humble opinion. Penny is always far too busy with some other happenings in her life to make a real go at it. Her love life, some financial crisis, her attempt to date Leonard, and most recently what appear to be feelings of inadequacy.

All things which would make Sheldon feel guilty for adding to her problems. And thus staying his hand and keeping him from properly baiting her. So that they could have another true battle, the kind that was worthy of his genius. What Penny lacked in intelligence she more than made up for in sheer cunning.

It made her his lone worthy opponent. If he wasn't sure that Kripke, Wheaton, and winkle would run behind the law at the first sign of breaking and entering, he would have shown them who was boss long ago.

Penny was always up for a challenge. And something about a ruthless female was very appealing.

Penny is always at her most attractive when they fight. Her green eyes darken and flash, her face gains a flush that high lights her cheek bones. There's even a reddish tint to her lips when she purses them. No amount of shorts, tank tops, or tight clothing ever has ever garnered the same reaction from his biology.

And if he grits his teeth more out of self control than rage, well…

It is something no one else will ever know.

xXx

"Urgh!" Penny groans, throwing her hands up in frustration, "Why do I bother?"

They have gone from arguing about why 'Hello Kitty was awesome and Model Trains weren't' or vice versa, to yet another round of 'Is Sheldon Lee Cooper crazy?'. With Penny as the prosecutor with a resounding yes, and Sheldon on the defense clinging to his 'my mother had me tested excuse'.

It's getting pretty fucking old.

"It is a mystery to me" Sheldon agrees, snidely, "Especially when you know you're going to lose."

Then his eyes widen. Because unlike the last seventeen times they have had this argument, Penny doesn't storm dramatically out of the apartment. Slamming their door and her own, for effect. Instead she smirks.

A sure sign of trouble if Sheldon has ever seen one. A childhood with a twin sister had educated him quite thoroughly about the dangers of smirking females. He had a feeling Penny was about to give him another crash course.

Penny proves Sheldon right. She brings her hand palm out, in full view of Sheldon, and licks it. His child hood in Texas had warned Sheldon all about situations like this as well.

He turns to run. His room has always served him well as a haven from bullies; surely it will save him from Penny as well.

But Penny hadn't spent her own childhood in Junior Rodeo for nothing. And she tackles him to the ground before he makes it past the Kitchen Island.

Penny takes his shrieks as she rubs her wet palm on him as further proof of his insanity. She knows guys who would kill for her to straddle them and touch them with her wet palm. Spit slick or otherwise. She can't help but smile though, Sheldon has the best reactions to teasing she has ever seen.

Even if he would call what she does to him torture.

It's his entire fault though. He really shouldn't make it so fun.

XXX

So part three's already a little dirtier than this, and Ive barely started it. Should I just change the rating and do some smut?