A/N: When I had this idea earlier at work today, I laughed out loud. I had a customers at the cashdisk and he was very confused. I couldn't help but laugh though. Welcome to my brain when I'm bored.

As always, let me know what you think! Any comments are appreciated!

Thanks for all the favorites, follows and reviews so far! =D

Lucy woke up when the smoke surrounded her and intruded her lungs. The racking cough had her sitting upright and her hand slapped to her mouth and nose trying to prevent herself from breathing in the thick smoke.

Seconds later she realized how extremely hot it was. And that was when she realized that the side of her bed was on fire. No, scratch that, the man in her bed, was on fire.

"NATSU!" She screamed. This was no unusual way for her to try to wake him up. Only usually he wasn't on fire. He had snuck into her bed again. She was getting used to that part, randomly being on fire was not acceptable! "Natsu wake up you idiot! You're burning down my bed!" She threw her pillow at him trying to wake him and trying to put out the flames. Neither worked. Natsu just rolled over and mumbled something about being hot. Idiot, Lucy thought and threw her blanket over him. Soon it too caught fire and she knew she had to abandon hopes in trying to wake him.

That was when the fire alarm sounded.

"Great." Lucy said and let her hands flop in defeat. As soon as Natsu woke up the fire would be gone. But now the entire building would have to evacuate and the fire department would show up and ask a bunch of questions. Not to mention Landlady would throw a fit! If only she still had Aquarius. Lucy sighed and coughed.

"Lucy.. why are you making weird noises?" Natsu mumbled in his sleep, apparently unable to wake up. Lucy grabbed a smoldering hot robe from close to her bed, threw it around her and headed out of her bedroom. She went into the kitchen, grabbed a glass of water and went back into the bedroom. Without hesitating and with an annoyed face, she dumped the water on Natsu's face. He sputtered and woke up. He sat up, confused for a moment. Then.

"Holy!" He exclaimed and made a quick meal of the fire. Smoke surrounded them but Lucy could still see Natsu as he turned to her, his face red and his eyes wide. Lucy glared. She could have punched him, kicked him, thrown him out through the window.

"You owe me a bed." She said and left the room.

People were hurrying down the stairs and outside while the sirens were shrill in Lucy's ears. A cloud of smoke followed Lucy into the staircase and a few people had it in them to throw her angry glares and scared expressions at her completely dull face. She could have told them that there was no danger, that Natsu had taken care of the fire, but there was a protocol they had to follow. The fire department had to come and inspect her apartment and make sure nothing was on fire. Lucy sighed and let her head fall into her hands. Stupid Natsu, she thought. Why was he even on fire!?

There was a drizzle outside and people stood huddled along the river, holding their shoulders and shivering. Lucy mirrored their stances although she wasn't really cold. Her robe was still toasty warm.

Natsu came out of the building a little while later clutching a burned pillow to his stomach, his head down and looking very uncomfortable. Good, Lucy thought. He found her a little while later, a smoke trail followed him as he was still smoldering and the drizzle never actually hit his skin but evaporated around him. Lucy only spared a glare for him and he blushed and stood besides her and waited for the fire department.

The Landlady found Lucy a little while later and shouted at her for being so careless. Lucy could say nothing in her defence. She didn't know why Natsu had been on fire, he had never before had problems controlling his flames, so she just stood there and did her best not to listen. Natsu stood with his head hanging looking extremely embarrassed.

The fire department arrived and concluded that the fire had been put out properly. When the Landlady asked what had caused the fire the man glanced at Lucy and frowned.

"We're not sure, there's a shape of a person on the bed where the fire was concentrated." Lucy glared at Natsu. If looks could kick his ass. The Landlady glared too but at Lucy. The fire department took their leave with nods and words of caution in the future. When their truck had left the Landlady still stared at Lucy and just when Lucy was about to turn into her apartment, open all windows to let the smoke out, the Landlady pointed at her.

"This will be added to your rent!" She called. Lucy waved and stepped into her apartment, slammed her door shut before Natsu could follow her. As if that would stop him, he would just come right back in through her window. She had a mind to locking him out, but there was no way she could keep the smoke inside and go back to sleep.

There was the soft thud of his feet hitting the floor. Lucy spun around and threw the closest thing she had at him. The lamp went flying in a sharp arc at him and Natsu caught it with the pillow, it bounced and fell crashing to the floor. Lucy didn't care.

"You burned down my bed!" She yelled and threw the couch cushions one after the other. "There is smoke in everything I own! Do you know how long it will take to get the smell of smoke out of my stuff?!" She threw the book she'd been reading the night before. "Why on earth would you think it was a good idea to catch on fire!?" She threw another lamp. She was angry enough to call out one of her spirits but knew how strong Natsu was and how good friends her spirits were with Natsu. She didn't want to put two friends against each other, despite her anger.

"I didn't mean to!" Natsu said as he tried to catch the second lamp, failed and was caught by the next book Lucy threw at him. It made him fall onto his back. "Stop throwing things!" He shouted and fended off the third book.

"I'm not stopping until you explain yourself! And it better be damn good!" Lucy stood at her book case now and had a good supply of things to throw. Natsu seemed to realize this, turned beet red and held up his hands.

"I was dreaming, I didn't mean to catch on fire!" Lucy threw a book.

"What kind of dream would make you catch on fire!" She demanded. Natsu caught the book and set it aside. He went even redder. He clutched the pillow that had settled between his legs. Lucy picked up another book and raised her arm to throw it.

"Alright, alright… I… I dreamed about you." Natsu said and cringed and turned away his head as he waited for a new book to hit him. Lucy didn't throw it.

"Why were you dreaming about me?" Lucy asked hesitantly, her hand still raised, book ready to fly at him, but blushing too. Natsu cringed and didn't look at her. "Why did you catch on fire from a dream about me?" At the same time as she was curious she wasn't entirely sure if she wanted to know. Natsu took a deep breath and his blush renewed its his effort to keep his face bright red.

"It.. It happens when.. I … you and I… do things…" Lucy realized then that he was growing warm again, so warm that she could feel it from where she stood half way across the room. Then she realized.

"You had a sexdream about us?" Her hand dropped and the book fell to the floor. She hardly noticed as it toppled over onto her foot. Natsu didn't look at her but nodded. "Does that always happen?" He frowned and looked at her. His face was deep red and his eyes slightly bloodshot from the smoke.

"Do I always catch on fire when I have a dirty dream?" He asked. Lucy nodded and licked her lips suddenly intrigued. Natsu frowned and pulled the pillow closer to his body. "I… don't know… it doesn't happen that often." Lucy stepped closer. She had never heard of such a thing. She wondered if it was unique for Natsu because his body temperature worked as one with his emotions. She stepped into his heat and felt her slightly damp hair slowly grow warm and dry.

"Does it happen at other times too?" She asked. The closer she stepped the warmer she grew. So warm in fact she felt the need to throw off her robe. Not yet, she thought. Natsu bit his lip.

"I… don't know." He said hesitantly and suddenly seemed solemn. "Other times don't happen that often." He said "And … I wouldn't really know." Lucy was now in front of him and she sat down on her knees, opening the band that held her robe to her waist. Her night gown became visible and with it a lace clad cleavage. Natsu's eyes glanced at her.

"So you've never tried it?" He met her eyes and frowned.

"Tried what?" Lucy scooched closer not caring that her breasts were nearly spilling out of her night gown.

"Sex." She said bluntly but blushing nonetheless. Natsu but his lips again then shook his head. Lucy smiled softly then. "I haven't either." She said and felt her blush deepen. She looked at his eyes, dark and dependable. She noticed then how he clutched the pillow to his lower stomach, consequently also clutching it to his crotch. She didn't know what had gotten into her, but she was curious. "Can I see?" She asked and put a finger to the top of the pillow. His eyes grew wide and confusion rushed over his face.

"Why?" He asked. Lucy shrugged but took a deep breath.

"It's warm." She said and shrugged off her robe. She steeled herself then and bit her lip. "Do you want to know a secret?" She asked and looked shily at Natsu. He raised his eyebrows and nodded. Lucy blushed again. "I've had dirty dreams about you too."

For a moment Natsu was stunned. It seemed that it took a while for him to understand her words and not until he did, did he lean forward, and brushed his lips to Lucy's. She was startled at first but soon marveled at the sensation of having his scorching hot lips pressed against hers. He was a beginner at this too, he didn't know what to do. Lucy's only experience came from the novels she'd gotten from Levy, some of which now lay around Natsu where she'd thrown them at him. She moved closer to him, pushing her lips closer to his and he instinctively put his hands to her waist and held her above him. He was so warm, Lucy thought, it really felt as though he would catch on fire again. She put her hands on his shoulders but had to remove them when he was too warm.

"I think you might catch on fire again soon." Lucy said as she pulled away a little but she barely had time to take a proper breath before Natsu's lips were on hers again. He held her to her by the back of her head and her lower back.

"I wouldn't hurt you." He said in a soft voice and when Lucy put her hands to his shoulders again, testing the heat, he was indeed colder than before. She could run her hands over his body without feeling as though she would get burn marks. She could tangle her hands into his hair without feeling as though she was dipping her hands into boiling water. He was still hot to be sure, but not too hot. His hands were roaming over her body too, testing waters when he skimmed over her hips or just barely touched the underside of her breasts. Lucy in turn brushed her fingers low over his back and low over his hips, snaking over the band of his pants, slipping her hands into his vest and touching his hot skin. She understood now why he has mumbled about being warm. This must have been what he was feeling when he was dreaming. Because she felt as though she was about to catch on fire too. She was out of breath and she wanted nothing more than to throw a bucket of water over her head. At the same time, she didn't want to move away or find a single reason why she should stop kissing Natsu. Because she trusted him when he said he wouldn't hurt her, and he also seemed to imply that he was going to make her feel really good.

His lips left hers and explored her throat, kissed scorching trails down the line of her pulse and over her collarbone. His hands skimmed over her shoulders as he drew the shoulder straps of her nightgown over her shoulders letting it fall to her waist. He looked up at her for a moment and waited for her nod before he cupped her breasts and squeezed. Lucy moaned and Natsu shivered and cranked up the heat a little again. It was just what Lucy needed. Lucy let her hands run rampant and reached the line of his pants again. She allowed them to run a little lower before she too looked up at Natsu and waited for his consent. He nodded and she found the bulge of his pants that he had been trying to hide behind her burnt pillow. It was his turn to moan and his moan sent a shiver up Lucy's spine. He grew hotter yet and the heat alone made Lucy moan as he slowly massaged her breasts and kissed her skin.

Slowly Lucy crawled closer to Natsu until she settled herself over Natsu's lap. She wanted him closer though and so, with blushing cheeks sat down on his hips. She felt his length pressing against her and she moaned at the sensation that went through her.

"Natsu." She breathed, one of her hands curling in his hair, the other rubbing him through his pants.

"Lucy?" He breathed and looked up at her. "Do you want to stop?" Lucy shook her head.

"No. I want more. but I'm not entirely sure what more is." Natsu smiled.

"Me neither." But he hesitated. "My instincts tell me … things. I don't know how to explain…" Lucy put her finger to his lips then.

"Show me." She kissed him again and he responded more vigorously than before. He picked her up by the legs and wrapped them around his waist. He moved to the couch and laid her down. His hips settles between hers and his length pushed at her most intimate parts. She gasped as his hips moved against her and slowly she noticed how wet she was.

"Natsu." She breathed in her moan. His hands ran down her body and slowly pushed the nightgown over her hips and stripped her of her panties in the same go. Lucy fumbled at his pants, understanding a little better what it was she wanted. She wanted him inside her. She wanted to share intimacy with Natsu, the man who was on fire above her. His fire didn't burn her though. When she reached out to touch him, his flames moved away from her and the skin she touched was rather cool.

Natsu slipped out of his pants and his erection sprang free. Lucy smiled.

"Can I touch it?" She asked out of breath. Natsu nodded. Slowly she wrapped a finger around him. The flames moved out of her way as her hand closed around him. Natsu moaned and his hips jerked. It made Lucy moan. She pulled him closer, both by his length and by his hair where her other hand had tangled itself. She positioned his tip at her entrance. They looked at each other, met each others' eyes and smiled simultaneously. Natsu leaned in for a kiss and when he did, he pushed himself into Lucy.

Lucy moaned and cringed a little at the foreign object entering her. It felt better than anything she'd ever experienced and she pressed Natsu hard to her. He too was breathing rapidly as if trying to catch a million breaths that had gone lost in this experience. Eventually.

"Natsu, move." She said and rolled her hips. He moaned and responded by pulling himself out and moving back in slowly. It was ecstasy.

Their lips crushed together as Natsu's hips moved ever faster and Lucy met his thrusts with equal vigour every time. It didn't take long before Lucy was crying out loudly and Natsu was moaning into her hair, kissing her ear and sucking at the skin at her neck. Before long a ball of explosives had built in Lucy's stomach and for every time Natsu thrust into her, it threatened to explode. That was when Natsu moved his hand between them and touched a place between Lucy's legs that had her crying out in no time, her orgasm shattering any embarrassment. She felt herself clench around Natsu's length and moments later his thrusts became erratic and when he came, Lucy could feel him spilling himself all inside her.

Breathing heavily they stayed in their position for a while. Natsu slowly stopped burning and filled the room with smoke again.

"It seems you do catch fire other times too." Lucy said, still out of breath. Natsu chuckled and kissed her neck.

"Does this mean you're still mad at me?" He asked and kissed his way up to her lips.

"No." She said and accepted his kiss. "But you still owe me a bed." Natsu smiled.

"Can we do this again?" He asked. A mischievous grin spread on Lucy's face.

"If you promise not to burn anything else."

"I didn't burn anything this time!" Natsu said. Lucy laughed.

"Yes, but there's smoke everywhere!"

"It's okay, I left the window open when I came in through ." Natsu said. Lucy slapped her hand to her forehead and blushed deep red.

"That doesn't actually make things better..." Natsu moved inside her and she couldn't repress a moan.

"Do I need to apologize again?" Natsu said with a grin across his face. Lucy looked at him.

"Yes." She said and grabbed his hair and crushed his lips to hers. This was a better way to stay up at night to say the least. She'd care about the smoke and her neighbors later. As long as the fire alarm didn't go off again.