Hey there! This is my first Spiderman fic, I hope you like it. Please review, it really helps me.

Rights for Spiderman go to the correct owner, and please forgive me if some of the villains or Spiderman is OOC, I'm just doing my best to write some awesome yaoi. Spiderman's the sub, all the way, just so you know.

Oh yeah…. WARNING: WILL CONTAIN A HOPEFULLY HUGE AMOUNT OF SPIDEY/VILLAIN YAOI. …. Just be prepared….

Peter Parker wasn't a master on DNA, but he understood a lot more than the average person. He wasn't an expert on spiders… no wait, yes he was an expert on spiders, but there are things in nature that not even experts can know about. He'd had his own blood, his DNA, tested after the spider bite that changed his life, and he knew that a lot of the aspects of himself had been changed, but there was something he could have never predicted.

Peter gazed into the computer screen, reading what most people what have just thought was mumbo-jumbo as words. His eyes moved quickly over the screen, a map of his DNA, and suddenly he smelt the warm smell of jasmine over his shoulder.

"MJ!" He said, surprised and leaning back. He'd been so absorbed in his work; he hadn't even heard her come in. Actually, he probably wouldn't have heard if a train smashed in. His sort-of girlfriend gave him a vacant smile, and his smile dropped at her expression.

"Still here, Peter?" She said, gazing down at the computer screen with an distant look of contempt. Her red hair flowed over her shoulder, and brushed his hand. He pulled back guiltily. "It's almost midnight, and your still at some dusty old lab, working… if you were being Spiderman, I could maybe understand your not being home, but sometimes it feels like your married to science." She laughed tightly, and Peter smiled tightly. In the past few months since she'd gone straight to show business, their relationship had plummeted straight down into a ditch. She mostly kept seeing him because he was Spiderman; he mostly kept seeing her for her good looks.

"I was researching how my own DNA had combined with a spider's, actually." He said, "It's important for me to know this type of stuff. The spider I was bitten by was a new species, technically, so no one really knew a lot about it."

"Even the scientists who made it?" She asked doubtfully.

"It's more like it made itself, the scientists just helped it to evolve a little faster." He tried to explain, but like usual it went in one ear, out the other. He tried to explain it in some way that might interest her. "Look, what I've been researching lately is a gene that hasn't really shown up in a lot of spiders, but it crossed over to me. The closest natural thing to it is the way a female spider will met a male, the male will court her, mate, and take good care of her, until the stronger female spider kills it off. It's strange, because the male and female have such different roles. The male is obsessed with the female, takes care of her, and doesn't let her near any other spider. The female lets this happen, only in some cases ends up killing off the male. Only it's a little bit different…" He peered at the screen, perplexed. "The possibility is open that the female spider won't kill the male at all, maybe…"

"So what, is that a death threat? Or is that just you saying you're in the mood to get laid tonight?" MJ challenged.

"What? No!"

"Yeah, sure. That's all you care about recently, sex, Spiderman and science. We don't even talk anymore."

"I was just telling you what I was doing! That's all! Can't you see how important this is to me, MJ? This spider is in my genes, this… weird genetic code like I was just telling you about is me!"

"And it's all about you, isn't it, Peter?" She said, and shook her head, beautiful hair spinning around her. She was so beautiful, it was no wonder she was popular on stage, but Peter was an attractive guy, too, even if she couldn't see it. He was tall, toned but not too muscular, his dark hair was thick and soft, and his eyelashes were long. Plenty of girls had noticed Peter over the years, once his glasses came off. There was something sensitive but strong in his hazel eyes, and his cheekbones could cut they were so sharp.

"MJ…" He said, but hesitated. Did he want to go crawling back to her? Nothing good was coming out of their relationship, and they were both ready to move on.

She sighed. "I'll be sleeping at my house tonight, maybe for a while. I just need some time alone with my thoughts, OK? I'll call you later." She turned, and left, and he watched her as she went. Her hips had a confident sway, and her outfit was tight and bold, it was like she wasn't the girl he used to know.

He turned back to the computer. He could forget about MJ if he could figure out what was wrong with his equation. He was missing something that was in his DNA, some mutation that his body had caused to this reproduction cycle, some part to this whole mate thing…

He stared at it, and then, with dawning suspicion, entered in a new figure into the equation. It checked out correctly, and leaned back in his chair numbly.

Slowly, he began to laugh, until tears of laughter ran down his cheeks, which he quickly wiped away, and straightened up.

"Oh man." He said. "I'm the female spider."

He returned home, at least at 3 o'clock in the morning, and when he looked at his bed, cozy and warm in the snug corner of his loft, he almost expected to see Mary Jane lying there, forgiving him. She wasn't. He went and sat at one of his tables, not yet tired, and gazed around the room. It was a stylish loft, humble, maybe not in the best part of town, but the best they could afford and well-taken care of with plenty of style. It was empty, cold, and quiet, and he ran his fingers through his hair. He'd spent a few hours monitoring and fighting crime, but he was exhausted. So exhausted. The crime-fighting life was leaving him worn down and tired, every night, and every night he had to get up a few hours after falling asleep to go to work. Sometimes he'd wish the police would catch him just so he could go to prison and sleep soundly for a month, at least.

His head hit the pillow, but tonight he couldn't just fall asleep, he had too many thoughts. What did I mean to have one half of you be a female spider? What was going to happen to him and MJ? How long would he be able to carry on living like he did without anyone's help?

He thought he didn't have to worry about being a female mate to someone else, ever, because, after all, he was the only member of that species of spider. There were certainly no male spiders that would be like him, so what was the use of worrying? He was the only one who even knew he was part female-spider, so why should he tell anyone when he could just keep it a secret?

Eventually, exhaustion and fatigue so powerful it made him weak, made him close his eyes and forget all about what he'd found out, as he slept. However, what Peter forgot to put into his mental "equation" was that he was not, actually the one person who had the DNA of the spider. By sheer coincidence, they had gotten the DNA of a male spider. Who, then, had Peter Parker shared DNA with? Who's blood had he spilt on so many times that his infectious DNA could merge with theirs?

None other than his worst enemies, of course, his archenemies lurking in the shadows of New York.

There'll definitely be some yaoi next chapter, promise. Any requests on who you'd like to be one of Spiderman's "mates"? I already have a rough idea… :D

WARNING: WILL BE SOME RAPE/HARDCORE SEX IN THE NEXT CHAPTERS.