"Come on, Amy. We're going to be late."

Standing by the door of Amy's apartment was a very impatient Sheldon Cooper.

Sheldon, Amy, Howard and Bernadette were all going to The California Science Center. It was Anything Can Happen Thursday and Howard had suggested it a couple days ago since Leonard and Penny had already made plans and Raj didn't want to be a fifth wheel.

"I'm coming, I'm coming."

He grinned as she emerged from the bedroom wearing a blue and white striped blouse and a black pencil skirt. The fact that she ditched her tights for the evening did not go unnoticed by Sheldon.

"Won't your legs be cold?"

She looked down at her legs before she grabbed her purse and walked up to her boyfriend. "I don't think so. It's a little chilly in the museum, but you can warm them up for me."

He mimicked the evident smirk on her face as she let her body brush against his on her way out the door.

He quickly shook his head before he turned to close the door and locked it. "Vixen."

"Where to first?" Bernadette asked as they entered through the main doors.

"Let's go see Endeavour," Amy suggested looking over at Sheldon.

"That sounds like a good place to start," he nodded.

Amy grabbed his hand as they followed the other couple to the Samuel Oschin Pavilion where Endeavour was.

"Wow," Sheldon grinned and Amy couldn't help the smile on her face. He looked like a child in a candy store as he marveled at the space shuttle.

"This says 'Endeavour successfully completed 25 missions into space, including the first service mission to the Hubble Space Telescope, as well as the first mission to add a U.S. component to the International Space Station.' Wish we could go inside," Howard sighed.

"It's also the first, and only, shuttle named by elementary and secondary students. That's really interesting."

Sheldon grinned at how excited his girlfriend seemed to be about this type of history. There was nothing sexier than having his girlfriend share an interest with him.

After a couple more exhibits, the foursome decided to get some lunch. After ordering their burgers and hot dogs from Grab N Go, they finally agreed to sit inside after Sheldon complained about possible bugs getting into their food.

"Where are we going after this?" Sheldon asked before he took a bite of his bacon cheeseburger.

"How about Creative World," Howard suggested as he picked up his soda and looked over at his wife.

"That's fine with me."

"Amy?"

Amy looked up from her pamphlet when she heard Sheldon call her. "What? Oh, yeah. Creative World sounds good."

"Then it's settled," Sheldon smiled at her and ended the discussion by sipping his lemonade.

Though his contentment ended abruptly when he felt Amy take his right hand under the table and let it slip under her skirt.

He gasped when his fingers felt wet warmth and quickly realized what she was trying to tell him.

She's not wearing panties.

He quickly looked over at her with wide eyes, but she merely smiled innocently at him as she dropped his hand and went back to her fries.

This was going to be a long afternoon.

As they walked through the next exhibit, Amy felt Sheldon's hand slip from hers and move to around her waist.

She smiled as she leaned against him a bit until she felt his hand move lower until he got a handful of her butt and squeezed. If she was going to mess with him, he was going to get her back.

Her eyes widened before she felt him move back his hand up around her waist again and she smirked.

"You are very assertive today, Dr. Cooper," she whispered and instantly felt him tense up.

"Call me that again and I'll be even more assertive when we get back to your place."

"Is that a promise?"

He shivered at how game she was for their extracurricular activities. If he was being honest, he wouldn't mind leaving right now to have his way wit her. He had been waiting all week for this trip and now he wanted to get home to be with Amy? What was happening to him?

"Sheldon?"

He quickly shook his head from his thoughts to look at down at his concerned girlfriend. "Are you all right?"

He nodded with a small smile while pulling her a bit closer to him as they walked into the next exhibit.

"Thanks again for driving, Howard."

"No problem. Glad you guys had fun."

"See you two for pizza night?" Sheldon asked confirming their usual plans.

"We'll be there."

Sheldon smiled at the blonde before he shut the car door and the couple waved goodbye as they made their way into the Amy's apartment building.

As they rounded the stairs, Sheldon couldn't keep the smile off his face. He just had a wonderful afternoon and was finally alone again with his intelligent, sexy girlfriend.

Not to mention they both silently agreed that when they were back at Amy's, they would be able to pick up from where they left off.

Namely, his hands on her derriere.

The minute they were inside and Amy's apartment door had shut, Sheldon pulled her in by her hips and pressed his lips to hers, letting his hands travel back around to cup her ass with no wandering eyes to observe them.

She gasped when he pushed her into him, her core pressing against his groin and he moaned into her mouth.

She held onto his forearms as he massaged her buttocks in his hands and she whimpered at how good he felt against her. As her tongue caressed his upper lip, her thumbs began to caress the inside of his arms and was intrigued to see how much it affected him as his breathing was turning ragged and he couldn't seem to keep his lips closed around hers.

"Hmm," she smirked against his lips, feeling his breath enter her mouth. "Does Dr. Cooper like that?"

He twitched when she used his title on him again and Amy felt her knees grow week at the sensation.

Without answering, he held her hips again as he walked her backwards into her bedroom, until they was beside her bed and he let his lips move to her jawline as she tipped her head back further.

"Sheldon," she breathed and it only egged him on further, letting his hands move to her skirt and unzip it before he pushed it down her legs before he let his hand cup her center and she cried out his name.

She stepped out of her skirt as she blindly reached to let her hands travel under his shirts, caressing his skin with her fingers. Her actions soon became clumsy when he let a finger rub against her clit and he listened as she whimpered. She pushed the shirts them up over his head and once the shirts were on the floor, he deftly pulled both her cardigan and blouse over her head, leaving her in her red bra.

"You are overdressed."

He grinned as he watched her work on his belt until his pants pooled at his feet. He pulled his briefs down and stepped out of them before removing her bra.

Grabbing her waist, he pulled her down onto the bed before he got on top of her where he let his lips hungrily explore her neck.

Besides her lips, her neck was her favorite spot to be kissed. She turned her head to the left, giving his lips more space to devour her.

She groaned as she felt him begin to rub against her, his arousal probing her entrance.

"Uh Sheldon. Condom. Now."

He groaned before he jumped off her and went into his pants, pulling out a foil packet and ripping it open before rolling the contraceptive on.

He turned to look at her and couldn't help the grin as she leaned up on her elbows, her sheets covering her bits and pieces.

"Mmm, why so shy all of a sudden?"

"I'm not shy," she assured him and broke out in a giggle when he jumped on the bed and ripped the covers away from her body before he crushed his lips with hers.

When he pulled back, he found himself staring into her eyes and could easily see the love she held for him.

He took her face in his hands and kissed her softly. "I love you," he whispered.

She cupped his face before repeated those three little words. It was so easy to let them slip from her lips.

When he finally slipped inside of her, she dropped her hands to the mattress and tugged on the sheets as she arched her hips.

"Shit."

Sheldon pressed his hands into the mattress; his body above hers as he continued to slowly move inside her.

The slow thrusts were torturous and she let him know by grabbing onto his ass and pressing him into her.

"Dear Lord," he gasped before he began to pick up speed, driving into her again and again until both of them were at their peak.

"Uhhh yes."

"That's it. Let go, Love."

Amy relaxed as best she could as Sheldon continued to take her over the edge. She felt her walls clench around him as beads of sweat slipped down the valley of her breasts until she finally let go and came hard around him, screaming his name as he continued to thrust inside her.

Sheldon followed moments after before he collapsed on top of her, peppering her neck with kisses, his hot breath washing over her skin as he tried to regain his breathing as her hands ran up and down his back.

When he rolled over onto his side, he slid his arm around her waist as her hand moved to run through his hair. "You'll still tell me when you're too tired for sex, right?"

She smiled as she nodded. "Yes, but this was definitely not one of those times."

He grinned as he moved in to kiss her but stopped when her eyes widened and she quickly pulled away from him, jumping out of the bed and running to the bathroom where he heard her heave.

Jumping off the bed, he pulled off the condom and tossed it in the trash before grabbing a fresh pair of briefs, slipping them on before he grabbed her robe; peeking his head into her bathroom he saw her over the toilet.

"Are you all right?"

"I think s-"

He grimaced when she started to vomit again, but he walked up to her and rubbed her back. "Do you think it was that hot dog today?" He stepped back when they were both sure she had finished before he handed her a tissue to wipe her mouth before giving her her robe.

"I don't know. It just came on so suddenly." She slipped on her robe and tied the front before she grabbed her toothbrush and after applying some toothpaste, she started to brush her teeth.

"Well, we always use a condom, so we know it's not a pregnancy," he chuckled until he watched Amy spit toothpaste onto her mirror. "Oh. See that's why you need a piece of tape that tells you when you're too close."

"We didn't!"

He jumped at her outburst. "What?"

"We didn't use a condom!"

"What are you talking about? I just took it off."

"In the shower! When we did it on your spot and then again in the shower. We didn't use one in the shower!"

He felt his brain rattle as he tried to think of what time. Finally his eidetic memory kicked in and he froze.

"Sheldon?" Nothing. "Sheldon?" Still nothing. She walked up to him and grabbed his biceps. "Sheldon!"

"Oh my God, you're pregnant!"

"We don't know that!" She yelled back.

"Why are you yelling?" he shouted.

"Because you're yelling!"

He made himself relax when he saw the tears in her eyes. "I'm sorry. Please, don't cry. You know I can't deal with people crying."

"Well if I'm pregnant you'll have to get used to the hormones. This is what happens when you want sex all the time," she wailed.

He quickly took her in his arms and hugged her close, letting his hand awkwardly caress her back. "I'm sorry. When- when was the last time you got your... you know."

Amy made a 'what the hell are you talking about face' and watched him sigh.

"Your mensies."

"Ohh. Umm I'm not supposed to get it for another three days."

"Aren't there test that can tell you before your first missed period?"

She nodded before she turned to the mirror and began to wipe it clean before she rinsed her mouth.

"Let me just get dressed and I'll run to the drug store down the street. It'll take me no more than fifteen minutes"

He nodded before he walked back to the bedroom and began to change.

This was going to be the longest fifteen minutes of his life.