Twelve and a Half Hours

"Tomorrow? Why tomorrow?" he asked.

"Because you've been helping my with my issues. And you've done great, you've made me feel great. I need one more day with you. One more night with you," she explained. She was somewhat nauseous with nerves; here, at the beginning of her plan, things could go terribly wrong.

"You do?"

"Yes, I do. There are some things that I need you to show me. Like how to kiss, how to do other...things. You understand?"

Although Mark had fantasized about such 'things', he really didn't expect such a request from his sister. "I understand you alright, it's just that I really don't think that we should do that sort of thing. You're my little sister."

"Listen. Listen to me, I realize that. I know what people would think if they found out. But who would find out? I know that I shouldn't want to make love to you, but I do. I trust you and I love you. I don't want my first real kiss to be with some guy that I met at a club. I don't want to lose my virginity to one of the boys at school that more likely than not don't know what they're doing themselves."

Mark couldn't remember a time when he had felt so emotionally drained. All before lunch. He wasn't sure if any of what he was hearing was real, as if he was having some sort of out-of-body experience. "Heather. Oh Heather, it's not about looks or anything, I think that you're...you're just amazing and sexy. But if we do something like what you're saying, I'm not sure I could live with myself afterward. I mean, I would feel super guilty. You're so young and sweet, it would be like...I don't know..."

"Like you were taking advantage of me or something?" she interrupted.

"Yeah, kind of like that."

"No it wouldn't. You'd be teaching me, and I want you to. I've thought about it, and believe me, I wouldn't ask if I thought that I wouldn't be able to handle it. I feel safe with you and I want you to show me what it's like. Don't feel guilty about it, you'd be doing me a huge favor. I know that we can never have a relationship like what you and Amy have. As you pointed out, we're brother and sister. But we can have one night, can't we? And tomorrow you can call Amy and patch things up with her. You should. You two probably need one another more than you realize."

"And what about you? What will you do after tomorrow? I mean, do you think you'd really be all right?" He had already mostly given in to her idea. Weak will and high testosterone was fueling his lust.

"I'll be okay. I know that I can never have you, I don't think that could ever really work out. But, I'll at least know what it's like to be with you and I'll know what sex should be like. I'll find someone, eventually. They won't be you, but I'll know what to look for. I can't thank you enough for what you've done for me so far. Can we have this one night, too? Please?"

"Just the rest of today, and tomorrow we're back to brother and sister?"

"That's what I'm proposing," Heather replied. To her surprise, her brother smiled, and began to chuckle a little. "Why are you laughing?"

"I'm sorry, this whole conversation has been so tense, and with Amy calling a thousand times, I just...my nerves are shot. Don't ask me why, but listening to that last bit that you just said made me think of something I saw on television. Like you were a congresswoman on the senate floor trying to get a bill passed. I know it's not even funny, I don't know why I'm laughing. Nervous as hell, I guess.

"I don't want to do anything to hurt you or your feelings. Are you sure you want to do this with me? I'm not gonna lie, I've thought about sleeping with you. I will. It probably makes me a terrible person, but I will."

Heather smiled. "You're not a terrible person. Maybe a terrible sense of humor sometimes, but not a terrible person." She had to pause, take a deep breath, and swallow. "I thought that I might puke before I got done asking you." Then she picked up her phone and looked at the time. "There's twelve and a half hours left in the day. What do you want to teach me first?"

Mark had been standing by the opposite side of the table during the entire conversation. He extended his hand to his sister. She took it and rose from her seat. "I can't believe that we're actually doing this. Let's go in the living room." He took her to the couch where they sat next to one another. Despite this being exactly what she wanted, Heather was nervous at a level that she had never before conceived. Mark brushed a lock of hair from her face and looked directly into her eyes. "May I kiss you, Heather?"

She nodded her head in agreement and parted her lips slightly in anticipation. She had her eyes tightly closed, but couldn't help but open them again when his lips touched hers. He was handsome, her brother. Not like a movie star or an underwear model, but handsome nonetheless. His lips were much softer than she had imagined. She again closed her eyes when she felt his tongue slowly entering his mouth. After a moment, she tried to match what he was doing with hers. They kissed like that for a while before Mark pulled a short ways away.

"That wasn't so bad was it? I don't think you'll have a problem with kissing."

Heather sighed softly and opened her eyes. "That was nice. Let's do it some more."

Mark pulled his sister onto his lap and they resumed making out. His hands roamed up and down her back, he kissed the side of her neck and under her ear, causing her to hiss with delight. She did the same to him, feeling the definition of the muscles under his shirt, and the roughness of the slightest trace of stubble appearing at his neckline. When she moved her body slightly, she could suddenly feel something poking against her inner thigh.

"Is that you, uh, getting hard?" she asked in a whisper.

"Yeah."

"That's so hot." Something about Mark getting aroused did the same to her.

"Feel it," Mark said. He took her hand and guided it over the bulging outline of his erection that he was sporting through his jeans.

She rubbed her hand over and across it, then again. It seemed enormous compared to what she had seen when her brother had just gotten out of the shower. "Ohh, I want to see it."

Mark slid her off his lap and back beside him on the couch. "You will. I'm going to touch you a little first. Don't be afraid to tell me to stop if you don't like it or it gets uncomfortable or anything, okay? Don't ever do anything you don't want to do," he said, still delivering kisses along the sides of her neck.

Heather was on fire. "Oh my god, you can do whatever you want to me."

Her brother smiled. He wasn't feeling any guilt or awkwardness, just the heat of the moment. His sister was proving to be a very willing student. Kissing her fully on the lips, and with one arm around her back, he used his free hand to cover her front. He slipped it under her shirt, his shirt that she was still wearing from the night before, and cupped one of her petite breasts. She kissed him back with increased intensity as he switched from one to another, circling each nipple with the pads of his fingers.

Pleased with her reaction to that, Mark began to slide his hand down her chest, across her navel, and eventually into and under the waistband of her sweats. She parted her legs the best that she could in the position that she was in and awaited his touch. He traced the outside of her panties for a short time, then went inside of them. He felt nothing along the lines of pubic hair.

"Oh nice, you're shaved. I think that's very sexy."

Heather smiled, beginning to breathe heavy. Mark slid his hand down over her pussy, slowly moving his fingers over her outer lips. She was self-lubricating rather nicely. He parted the top of them with his thumb and began rubbing in a small circle where he thought her clit should be, finding it quickly. She moaned with new found pleasure.

"Do you like that?"

"Yes." She had touched herself before, but this was different. Very different.

"Don't be afraid to say what you like and what you don't like. It's hot when a woman says what they want," Mark advised. He was really getting into the role of the naughty teacher.

"I like it, I really like it," she sputtered. "You can put your fingers in me if you want."

"Like that?" he asked, inserting his middle and ring fingers into her hungry cunt. It was a tight fit, but a fit nonetheless. She almost immediately began to buck her hips, trying to fuck his hand.

"Just like that," she agreed. "Now in and out."

Mark obliged. He alternated between quick thrusts and slow ones, taking delight in the sensual noises that his sister was making. She seemed to have a pretty good idea of what was going on so far, so after a few minutes of this, he decided to do something different. He rolled from the couch as Heather sighed in disappointment at the absence of his touch. She had been close to reaching climax.

As he knelt in front of her, he began to pull her sweats and panties down. "Let's take your clothes off," he suggested. There were no complaints from the other side. Heather flung her shirt off and onto the floor, she hadn't been wearing a bra. Mark continued pulling and soon was looking at his naked sister for the first time. "You're beautiful, Heather," he said kissing the inside of knee and thigh, "I'm going to taste you and lick you."

"Okay," she replied quickly, with a nod.

Mark stood and positioned Heather on her back on the couch so that he could get on there with her and reach all of the tasty bits easily. Her naked, and before untouched sex glistened in front of him, slick with her juices. He dove in, intoxicated by the little wonder that lay before him.

Heather wanted to take his advice and let her brother know that she liked what he was doing to her. She wanted to tell him how amazing it felt to have his tongue inside of her, but she couldn't. She couldn't say a thing. She could make noises, but articulating words all of a sudden seemed very difficult. She was just trying to breathe, feeling as though she was about to explode. Then, all of a sudden, she did.

"Oh god! Oh!" she cried, her hands entwined in Mark's hair, pulling him tighter against her crotch. He, of course, knew what had happened and felt some sense of pride that he was the first man to bring her to orgasm. He slowed his licking, aware that she would probably be quite sensitive for a few moments, but wanting taste all of her that he could. Heather released her grip on his head, so he kissed his way back up to her mouth. "I like it," she finally managed to say.

Mark grinned. "Heh, I'm glad. I liked it, too. You taste amazing."

"You really like to do that?" she asked, wrapping her arms around his back.

"Sure I do. Especially to you, you sounded like you really enjoyed it."

Heather giggled. "I did! " She rubbed his back and craned her neck up so that she could speak into his ear. "Will you take your clothes off now? I want to look at you."

Mark once again rose from the couch. He pulled his shirt up and over his head, Heather's eyes glued to him like it was the most interesting thing that she had ever seen. To her, it was. He wasn't self conscious about his body, but he was certainly curious as to what she thought about it. He slid his jeans and boxers down around his ankles and kicked them off. He did a slow spin while Heather smiled up at him. "Well, what do you think?"

This was much better than the quick glimpse that she had gotten a little over a week ago. He was much closer and actually putting himself on display for her. Mark kept himself in pretty good shape. He didn't work out or anything, but was trim and certainly nothing to sneeze at. He had a little triangle of hair on his chest, and a little fuzz on his lower legs. Like her, it appeared as though he shaved his pubic region, something that she didn't pick up on when she caught him in the bathroom. His cock looked to be extremely hard and a bit darker in color than the rest of him. It had a slight curve to it and was pointing straight up at his belly button. She didn't know exactly how it compared with other men, but she was fairly sure it wasn't small. If it was going to go inside of her, she knew that it would pretty much fill her up.

"I think that you look pretty good naked. And you have a nice butt."

He reached out a hand to help her off the couch. "Let's go in the bedroom." He reached out and slapped her ass playfully as they started walking. She yelped, but just out of surprise, not any real pain. "I think your butt is a lot nicer." They walked into his room and fell onto the bed, kissing and embracing each other. Heather reached down and wrapped a hand around his cock. It was quite warm to the touch.

"How long does it stay hard like that?"

"Until I cum, and maybe a little bit afterward. Then it will usually get hard again in a couple of minutes if I'm still, you know, doing things."

"Do you masturbate a lot? Everyone always make jokes about how boys do that."

Mark chuckled. "Well, I guess that depends. Since Amy hasn't been around I've been doing it more. Almost every day. Before that, just once in a while. I did last night."

That caused Heather to grin. "You did? After I fell asleep, I take it. Did you think of me?"

"Yeah," he admitted. "It was kind of hard not to think of you after you'd been leaning up against me for an hour. And like I said, I think your awfully sexy."

"That was naughty, Mark."

"Not anywhere near as naughty as what I just did to you."

Heather giggled her sexy little giggle. "I suppose that's true." She was stroking her brother's dick slowly and gently. Once she had it in her hand, it just seemed like the thing to do. He wasn't complaining. She kissed around the sides of his neck and down onto his chest. "Now I want to do something naughty to you." She continued to slide down his belly until her face was even with his crotch. She cradled his balls and started giggling again.

"It doesn't exactly fill me with confidence to have you laughing at my package."

Heather tried to stifle her giggles. She was still more than just a little nervous and there was something so foreign and strange about having a set of testicles in her hands that she couldn't help it. "I'm not laughing at you. Well, I guess I am, but not in a bad way. You can't tell me that there's nothing funny looking about your...ball sack. Not just yours, but any picture of them that I've ever seen, they all look about the same. I sure as heck never touched one. I didn't mean to laugh at you, really."

"It's all right. I guess what I've got isn't anywhere near as pleasant to look at as what you've got. "

Mark wasn't at all upset about Heather's giggling, but he was growing impatient. He had had his raging erection for quite some time and it was screaming for release. He suspected that his sister was getting ready to suck his cock, though she sure was taking her time about it. She was performing a thorough investigation of his manhood before she put it in her mouth. Letting her move at her own pace, he couldn't help but twitch and hiss every time that she touched it.

At long last, she began to lick the head with the tip of her tongue, sampling the precum that was leaking out. "I have no idea how to do this, you know."

He wanted to tell her to just put the damn thing in her mouth, but he didn't. "You've probably seen a dirty video at some point. Do what they do on there. Take as much of me into your mouth that you can and move your head up and down. Try not to scrape me with your teeth. Stroke me with your hand every once in a while, like when you have to catch your breath." Not very insightful really, but he was trying to sound encouraging at least.

Heather had done a little 'research' on the internet from time to time and had seen a few blowjobs performed. At the time, she hadn't given a lot of thought to actually giving one. After the wonderful licking that Mark had given her, she really wanted to return the favor. The swollen cock that was staring her in the face was intimidating and inviting at the same time. It was exciting, so intimate and dirty, it felt surreal. Before she knew it, it was in her mouth and three quarters of the way down her throat. When she was right on the edge of gagging she lifted her head back up, then down again. She wasn't able to take quite all of it but she was able to develop a steady rhythm that was causing Mark to moan with pleasure.

He reached down and put a hand on the back of her head. He didn't apply any pressure, just lightly stroked her hair. "There you go, baby. A little faster, maybe." She obliged. "That feels real good."

Heather kept the pace up for as long as she could stand it. She was having a hard time getting a breath and her jaw was beginning to ache fiercely. Forced to release him from her mouth, she began to jack him off instead. "I had to take a break from that..." she was about to ask him how much longer it would be before he came, but he cut her off.

"Just keep doing that. Harder, I'm going to cum!" he shouted. She did exactly that, her hand becoming a blur up and down his shaft. It sounded to her as though he was in some sort of pain, though she suspected that was not the case. A sudden, thick stream of semen shot up and out of his cock, landing on her hand, wrist, and his stomach. More came out after the initial blast and dribbled down her fingers.

"It's so messy," she pointed out. "I take it I did that all right."

"Heh, yeah you did." Heather was still stroking him at this point. "Ease up now, okay? The head there gets like super sensitive right after I cum. Oh that felt good."

Heather held up her gooey hand. "That was really hot, but I'm going to go grab a towel, okay? Be right back." She was gone for a second, then came back to clean her brother.

"How thoughtful. Come up here." Mark pulled her by the hand close enough to where he could kiss her. "Are you doin' all right?"

"Yes." She lay against him with her head on his chest, watching his penis slowly deflate. "We're going to be able to do more?"

"Only if you want to. Only if you're comfortable."

"I want to keep going. Was that normal, what we just did and what you did to me back on the couch?"

"What do you mean by normal?" He was pretty sure that she knew that relatives didn't normally perform oral sex on each other.

"I mean do you do that like every time or just sometimes or what? How often?"

"You know that I can really only speak for Amy and I, right? I don't know the specifics on other people's sex lives. We've done just about everything to one another that we could think of and we've found things that we like. I really like to lick her, so I do it almost every time. She likes it too. She sucks me a lot, but not all the time. I guess it just depends on how we're feeling at the time."

"I liked sucking you, but it wasn't easy. It made me feel all nasty, but you know, nasty in a good way. How can I get it all in my mouth when it's hard?"

"That I don't know. I've never given head before."

"Well that's good to hear. You said to do what they did on the videos that I've seen, I have seen a couple. Those girls could swallow the whole thing, and no offense, but a couple of the guys looked like they were a lot bigger than you."

"Well damn Heather, I'm not a porn star. Neither are you. If I had some massive tool like a lot of those guys then maybe I would be. Those girls know how to suck a cock because they've probably sucked hundreds of cocks. It's not rocket science, if you do something a million times you'll probably get pretty good at it."

"Yeah, you're probably right. And I'm not trying to say anything bad about your...cock. It seems pretty big to me. If it was huge it would be scary, I mean it has to go inside of me. I don't want to get ripped apart."

"I won't hurt you. I'm not saying that it might not hurt a little, since you've never done it before, though. You do have one important thing going for you, it's kind of what your pussy's made for."