A/N: Things heat up for our newlyweds. Rating changed from T to M.

Amy stared at the door to their room. "How do we get in? I don't see a keyhole or card swiper."

"The rooms don't have locks," Sheldon explained. When his wife's eyes widened, he continued. "That's why I insisted we don't bring a lot of cash or the expensive camera. We'll keep our phones under our pillows while we sleep." He rolled the suitcase in front of the door. "An extra precaution."

"I don't think that will do much if an intruder tries coming in."

"That's all we have, that and our wits."

Amy stepped into the narrow space between the counter and couch. "It's very... cozy. Where do we sleep?"

"The couch folds down to a bed." He pulled it out to demonstrate.

"It looks pretty narrow. I hope we can both fit. We have more room on our bed at home, and that's not saying much."

He placed his hands on his hips and stared down at it. "It's billed as a two-person room. Perhaps that's because there's an upper bunk."

Her eyes followed his upward. "I don't want to spend the first night of our honeymoon on separate bunks."

"We'll make the bottom one work," he assured her.

As Sheldon brushed his teeth, he couldn't help but stare at the narrow bed in the mirror. It would be a tight squeeze, but they could do it. Either that or Amy would need to lie on top of him all night. He did love the feel of her, but all night would probably get uncomfortable for both of them.

He waited next to the bed as she performed her nighttime ablutions. His usual side was the one against the wall, but he had a dilemma.

Amy touched his arm. "Are you okay?" She asked softly.

"Of course. I'm riding my favorite mode of transportation with my favorite person."

"Then why aren't you getting in? Is the bedding not to your satisfaction? Maybe we should have taken the re-creation a step further and gone to a bed and breakfast."

"The bedding looks clean and smells like dryer sheets, which is reassuring. I just wanted to give you the chance to get the side where there's no chance of falling off."

She wrapped her arm around his waist. "That's really sweet, but I think we'll manage."

"Are you sure? I'm serious about switching sides. I promised you I would spend my life showing you how much I love you, and I meant every word. I love you enough to give you the better side."

"I love you too, and that's why I think you should have your usual side."

He furrowed his brow. "You're absolutely sure?"

"Yes, now get in," she goaded gently.

He lifted the top corner of the blanket and crawled under, sliding as far against the wall as humanly possible.

"Do you have enough room?" He asked when she snuggled up against him.

"I'll be fine."

He draped his arm around her waist and felt for the mattress behind her. There was barely enough room to fit a TV remote. She squealed when he pulled her even closer until they were nose to nose. In the dim light, he could barely make out her face, but he felt her heart racing against his chest. He tilted his head and pressed his lips to hers.

"Mmm..." she moaned, her hands caressing his face.

His fingers tangled in her locks, and he slipped his tongue in to mingle with hers. Her moans grew louder as they tasted each other. She shifted herself slightly, her hardened nipples poking his chest through the thin fabric of her nightgown. He was already hardening and pressed himself to her belly to let her know how much he desired her.

The sway of the train pushed and pulled them slightly toward and away from each other. He briefly thought it could help the thrusting motion when they made love, but the idea vanished when the train rails curved, and Amy nearly rolled off the bed. His arm tightened around her, his legs entwining with hers. If she was going to fall, he would go down with her.

He buried his head under her hair, his tongue running a trail down her neck. Experimenting, he traded his tongue for his lips, nibbling down the same trail then veering off to her earlobe.

"Oh, God, Sheldon!"

"You like that?" He murmured.

"Very much so." She subconsciously thrusted her hips while his lips did their magic.

"Oh, Amy you naughty vixen," he murmured against her neck.

"Sheldon, I need you." She twisted out of his grip and slowly pulled up her nightgown. Sheldon swallowed hard when her bare breasts revealed themselves to him. He quickly shucked off his shirt and pajama pants then hoisted her onto him so their most intimate parts were touching.

"You are so wet."

She leaned forward slightly, her nipples near his face. He wasted no time taking one into his mouth, while he massaged the other breast with his hand. As he sucked, licked, and gently nibbled, she rocked her body against his.

"Oh, dear Lord!" He groaned. His hands grabbed her bottom, lifting her just enough to position her opening over the tip of his length.

She hovered over, just barely touching him, her hands bracing herself on each side of his hips. "Are you ready, Dr. Cooper?" She purred.

He nodded mutely. Grasping the base of him, she slowly lowered herself down, taking him in inch by inch, until he was completely buried then paused, their lustful eyes meeting. She rose up slowly then back down again, her movements slow and teasing. When she suddenly halted her movements, he thrust his hips up, but she reached out and held him away.

"What's wrong?"

"We forgot to use protection."

"That's okay. We're married now and we both want children..."

Sheldon emitted an "oof" when a sudden jolt of the train caught Amy off guard. She flopped onto him, and he slipped back inside.

"I think that's the train's way of letting us know it's okay to continue as we are. We should be safe today, I shouldn't be fertile now."

"Not yet, but you will be on our return trip."

"Remind me we'll need to stop at a drugstore in Seattle before we get back on the train."

Sheldon frowned. "Why? I'm ready to start our family."

"I want to enjoy some time alone together first. We need to sit down and work out a timeframe before we start trying." She pressed her lips firmly to his. "I really want a family too, but it's a little too soon for me."

"Alright. I will respect your wishes."

"Thank you."

She lowered her lips to his then whipped her head toward the door before they made contact. Putting her finger to her lips, she held her breath and listened . "I thought I heard something. Must have just been someone walking by."

He strained to listen then relaxed. "You're probably right. Can you imagine someone sneaking in and finding us like this?" He shuddered.

"I don't know. A small part of me is kind of turned on at the prospect of a stranger walking in on us."

"Amy!"

"Just kidding." She lowered her lips to his once more and rocked against him. It didn't take him long to forget their interruption. His hips bucked up on each downward movement, and his tongue lapped at her nipples each time they came toward him. As he got closer, he thrust up faster and harder. Her mewls let him know she was getting close too. On her breasts' next journey toward him, he caught one in his mouth until she screamed his name.

He felt his own orgasm on the verge and gritted his teeth. They had never been intimate without a condom, and a small part of him worried about the imminent mess he would make on her and the bed and the slim chance they could become parents in nine months.. Those thoughts were quickly replaced with a feeling of pure ecstasy as reached behind her to fondle his testicles while giving him a perfect view of her taut peaks.

"Oh, dear Lord! Amy, you Vixen." He bucked his hips up once more, letting himself go.

Spent, she flopped onto him breathing hard. Her heart was pounding as hard as his own. When she caught her breath, Amy attempted to lift off her husband, but he held her gently, but firmly, in place.

"Not yet. I love the feel of you. I love how you make my emotions run wild. I love you, Amy Farrah Fowler-Cooper."

"I love you too, Sheldon Lee Cooper, for all those reasons and more."

He sighed happily as her lips descended upon his. His arms wrapped around her and caressed her bare back. She was right. They would never be able to re-create their first train kiss, but because of it, they would share many more, each one special in its own way.