A/N: This is a bit spicier than the others, but that's why it's Rated M for a reason. :)

...

~Naughty~

She doesn't know what came over when she decided to attack Sheldon. It was just an urge that hit her, and as hard as she tried, she couldn't fight it.

Penny and Sheldon were enjoying an evening alone in her apartment, watching a movie that she had picked. Though he wouldn't admit to her, Sheldon was actually half way interested in it.

It was dark, the only light visible was coming from the television. Penny was smuggled up so close to Sheldon that she was pinning him against arm rest...exactly where she wanted him.

She looked up at him, scanning his face, waiting for him to notice that she was looking at him. Sure enough, after a few moments, Sheldon looked at her, a playful questioning expression upon his face.

"Kiss me, Sheldon." Penny said, need apparent in her voice.

Sheldon hesitated, pausing for a moment to wonder why Penny would ask him of this out of nowhere. Mentally shrugging it off, he leaned in and kissed her.

Penny took a chance and ran the tip of her tongue along his bottom lip, begging him to let her in. Sheldon jerked, almost pulled away, but Penny wouldn't let him. She grabbed hold of his face and kept him close.

"Shhh," she soothed, "don't think about it. Just do it. Please?" Penny said quietly.

Sheldon groaned in protest, but his will power had nothing on his desire. He opened his mouth ever so slowly, allowing Penny entrance. She took the opportunity and slid her tongue in.

Sheldon damn near flung her off the couch, but somehow, he doesn't know how she did it, she twisted herself around and came to rest on his lap. Her lips were still pressed to his, and her tongue was still working inside his mouth. "Please, Sheldon," she begged, "just this once...for now?"

The urgency in her voice left Sheldon dumbfounded, but oddly...arousing. With a sigh, he gave in, giving Penny's tongue a couple exploratory licks with his own. It wasn't as bad as he thought it would be. She tasted sweet, with a hint of chocolate and raspberry that lingered from the candy bar she had consumed just moments before.

Slowly, Sheldon's arms found their way around Penny's waist, tightening each time she deepened the kiss.

Penny's fingers wove themselves in Sheldon's hair as she removed her mouth from his to place it on his neck. Soft little kitten kisses she gave him, making him gasp in pleasure. Slowly, Penny slid her hand down from his hair to rest on his chest. But she didn't stop there. She continued downward. Lower and lower she went, until she found what she was looking for.

"Oh!" Sheldon gasped in shock. "Penny..." But Sheldon was cut off when Penny began to rub his member through his pants.

Even though Sheldon didn't like the idea of coitus, there was only so much he can take. And Penny wasn't letting up anytime soon. So he did the only thing he could do. He got a firm grip around her waist, and hoisted her up and over. He laid her on her back and positioned himself on top.

He began to kiss her...hard. His hands pawed at the exposed skin below her shirt, making her squirm in pleasured moans.

Sheldon decided then, that if he was going to give it up, it would be on his terms. He was going to tease Penny first, then give it to her, as the phrase goes. He moved his mouth to her neck, giving it little nips here and there, making Penny squirm all the more. His hand snaked up and underneath her shirt, coming to rest upon her supple breast, making Penny moan loudly.

It was starting to get unbearable...for both of them. Penny's arousal heightened with each touch he gave her, and Sheldon's from just plain overexposure to the whole situation.

"Sheldon? Are...you sure...you want...to do this?" Penny asked between kisses.

Sheldon looked at her thoughtfully for a moment, then said, "At first, no, but if you want me to do this, I will. Only with you."

"Sheldon, sweetie, if you're not ready, then I don't want to force you ."

Sheldon sighed. He really wasn't ready, and he was grateful that she was understanding. "Then, I'm not ready. I am sorry. But, I am content with just kissing you...for now. It'll happen eventually, Penny, but I need some time."

Penny smiled at him. That was her whack-a-doodle, doing anything to make her happy. "Okay, sweetie. I think I'm okay with just being able to kiss you...for now."

Sheldon smiled and leaned in for a kiss, but Penny stopped him. "Sheldon? When did you get so naughty?" She asked, remembering how he flipped her on her back and full on threw himself on her.

Sheldon chuckled lightly. "One does succumb to some odd things when caught in the heat of the moment."