Potential - Book Two - Cover

Potential - Book Two

Copyright© 2024 by EroticScribbler

Chapter 11: Lines are Drawn to be Crossed

Coming of Age Sex Story: Chapter 11: Lines are Drawn to be Crossed - A teenage boy's normal struggles growing up with his twin sister, a stepmother, and stepsister are complicated by his porn brain and pantie fetish, or at least that's what he thinks. There might be more to the story. Too bad his best friend's moral compass is broken. This is Book Two. There's also a Book Three over at Bookapy, along with Book One, which is also here. Help support great authors!

Caution: This Coming of Age Sex Story contains strong sexual content, including mt/ft   mt/Fa   Fa/Fa   ft/ft   Teenagers   Consensual   Reluctant   Romantic   BiSexual   Heterosexual   Fiction   School   Incest   Mother   Son   Brother   Sister   Daughter   Group Sex   Anal Sex   Analingus   Bestiality   Cream Pie   Exhibitionism   First   Masturbation   Oral Sex   Sex Toys   Voyeurism  

Jason came out of the bathroom with a towel wrapped around his waist, thinking I crossed the line and did the one thing I said I’d never do. Although, that imaginary line had been him lying to himself. That had become clear once Jason was inside Becky and knew he’d always expected it to happen. Of course, he had, why else would he have been pushing Evan so hard toward Deana? One morsel of justification was all Jason needed, and Evan cumming in both of his sister’s underwear was enough. You can’t smell your sister’s pussy while you’re beating off and not want to fuck her, and under the right circumstances, Evan would do Deana or Gloria.

Technically, Jason hadn’t crossed that line, Becky had dragged him over it, and there was no decision for him to make. The decision-making started that morning. Don’t do it again, or do it?

Jason probably hadn’t been born with morals, but if he had, they were licked off his balls by that dog. Fear of being caught by his mother had been his only restraint. Where had that fear gone? It had been there when he sat down at the table with his mother. He watched her expression for a sign that she could see his guilt, but she hadn’t. That’s when Jason realized a guilty conscience had been blurring his vision, and that’s why he never noticed his mother’s body or paid much attention to her expressions. Fucking Becky had opened Jason’s eyes. He remembered the look on his mother’s face the time she walked in on him and Becky. Horrified, yes, but not at first. Hadn’t she waited until his cock stopped spurting cum before saying anything?

All the times he masturbated, knowing his mother was approaching, yet she never caught him. Jason assumed he had been amazingly lucky. And what about the time his mother forgot to lock the bathroom door? Shock and embarrassment filled him, but his mother had stood there with towels at arm’s length, not screaming or demanding he close the door. Had she been trying to tell him something?

“Damn,” Jason muttered when he saw Becky’s room was still empty. He should have jerked off in the shower. How could his sister not be there the morning after they finally had sex?

The thought made him feel stupid. He couldn’t start acting like Becky was his girlfriend, or he’d ruin a great opportunity. What could be better for two horny teenagers than living under the same roof? Jason thought there was one thing, but I’m trying not to think about it.

He walked past his room and went out the back door onto the patio, still wearing a towel. I’ve never beat off out here during the day, he thought, that might settle me down. His neighbors could see him, but only if they went far enough into their backyard to see around the tall hedges that lined both sides of the patio. They were never home during the day anyway. Thinking about getting caught excited him.

Jason sat down and placed his hands on his lap. He parted his legs enough to feel his dick under the towel. A chain link fence was around their yard, but anybody could walk through the gate by the driveway. It was probably even open. Maybe Becky would come home and catch him?

That thought made Jason’s cock grow, but he kept it concealed. The idea of getting caught masturbating was exciting, but actually getting caught by almost anybody other than Becky would simply be humiliating. Even if it were Becky, he’d still be embarrassed. The UPS guy or a kid from the neighborhood could walk back there, too. His dick got stiff, and Jason started to peel back the towel.


Deana looked at Rebecca and said, “What?”

“I said--”Rebecca waited for the rumble from Cindy’s car to fade--”it’s hard to believe you aren’t sisters. You look alike, act the same and even sound like each other. Oh, and she’s gorgeous, too.”

“I used to spend a lot more time around her ... when I was little, growing up, so I probably started acting like her. It’s a little weird when I see myself in her.”

“Did you notice how she looked at me when she said, ‘Ya’ll have fun ... lots of fun.’?”

“No.”

“Yes, you did, and just like you, Cindy’s face, her smirk, said a lot more.”

“It wasn’t anything.”

Rebecca’s grip on Deana’s arm reminded her how strong the pint-sized gymnast was. She was very perceptive, too. “Dee, you didn’t?”

It was impossible to lie to Rebecca. “No, I didn’t, but I did ... sort of.”

“You did or you didn’t, and I know you did,” Rebecca said. “We agreed--”

“It’s cool, I swear it is. She’s going to be a psychologist, and she’d never tell and she told me she’s done it. I had to tell her, she knew anyway.”

“How could she know?”

“She just did. She knew something was bothering me. It’s like she was reading my mind, and I had to tell.”

“So she’s exactly like you, reading people’s thoughts.”

“Yours are usually written on your face for me to read,” Deana said. “I saw the way you were looking at Cindy. It was so obvious what you were thinking about.”

“I wasn’t thinking anything except how much sexier you’ll be in three years.”

“Whatever. Oh, Cindy said you’re cute.”

“Really?”

“Yup, and she said you’re probably a real firecracker. Don’t worry, I didn’t give her details.”

Rebecca got that naughty look in her eyes. “Maybe we can get some therapy from her. Can you imagine doing it with Cindy? I can, and it would be like being with you in the future.”

“She’s my cousin!”

“Yeah, she is,” Rebecca said with a shrug. “Who’d she do it with?”

“I didn’t ask.”

“Why not? You told her who you did it with. Why not ask? Wonder if it’s somebody we know.”

“I didn’t tell her, she knew it was you.”

“She’s smart, like you. You should have asked her to stay a while. Ever thought about having a threesome?”

“If I did, it wouldn’t be with my cousin.” I’d want to have her to myself, Deana thought.

“Yeah, but maybe that’s how we can get you that thing you’ve never had? I could--”

“I told you, I’m not going to do some random guy just so I know what a dick feels like. Might as well just use a dildo if it’s not someone I love.”

“Hmm, really.”

“Stop that.”

“Oh, shoot, all that Cindy stuff made me forget,” Rebecca said. “I’ve been waiting all day to show you this. It feels amazing!”

Before Deana could say anything, Rebecca was pulling the front of her shorts down. “Look, I did it too, but I didn’t want to be a copycat, so I did it different.”

Deana stared. Two thin lines of pubic hair formed the letter V, like an arrow pointing at the divot at the top of Rebecca’s slit. “I don’t think you want your neighbors or parents to see what I’m about to do to you, so you better put that away.” It’s a good thing Evan isn’t here. She had never wanted sex so bad.

“Really?” Rebecca said, running the tip of her finger up her bald flesh as her waistband rose. “I don’t think I’ve ever seen that look before. What’s got you so excited? Is there anything I should know about?”

“Please stop.” Deana took a deep breath. As much as she wanted to, she couldn’t tell Rebecca. “Stop looking at me like that while your parents are home.”

“Look at you,” Rebecca said and held Deana’s hands. “You’re shaking. Tell me! I know there’s more.”

“I told you on the phone I was horny, and if you went for a ride in that car, you’d know why I’m shaking. It’s the most terrifying excitement you’ll ever have. It went from nothing to over a hundred miles an hour in the blink of an eye, and it vibrates.”

“It’s Cindy, isn’t it?”

“Yeah, Cindy’s crazy, a little crazy, and I got scared, but not like I should have. She has so much confidence and something I can’t explain. She makes me feel safe even when all my senses tell me to be afraid.”

“Mm, that thing you can’t explain, that’s how you make me feel,” Rebecca said. “We better go in because I wanted you before, and now I’m horny enough to go down on you right here in the front yard. My neighbors can watch.”

“You better knock all that off until your parents leave,” Deana said. She needed to get a grip on herself.

Rebecca mimicked pushing a button. “I have a lock.”

“Yeah, but do you have a soundproof door you haven’t told me about?”

“You can bite your tongue,” Rebecca said.

I’d have to bite it off, Deana thought.


What was that? The sound was probably a squirrel or a twig falling from a tree, but Jason shoved his boner between his thighs and closed the towel over them. He listened intently. There it was again, and the light coming through the bushes flickered. He’d never make it to the door. Please be Becky.

“Jason?” It was a girl’s voice, not Becky’s. “Hi Ja--Ah, do you always wear a towel outside?”

He was more shocked than embarrassed. What the hell was the fuckin’ redhead doing in his backyard? “Darlene,” he said. He had seen his sister with Darlene at school but never anywhere else, especially not at his house. “Becky isn’t here.”

“I know,” Darlene said. “She went to the mall, but she told me it would be okay if I came over to talk to you.”

The shock tapered, and Jason’s embarrassment grew. What if he had just shot a load on the cement? He looked Darlene up and down, then tried to focus on her face. That wouldn’t be easy. “Talk to me?” he said, then his eyes dropped again.

Darlene’s skirt was two feet shorter than his towel. The heels she was wearing made her creamy-white legs seem never-ending, and her beefy thighs were four boners out of five on his scale. Her faded Paramore T-shirt squeezed her chest up into the sliced neckline. Was she wearing a bra? That deep trench between her huge melons needed a greased cock sliding through it, and he had one to volunteer.

“Yes, talk to you. Becky said I should stop by. She thought you would be home.”

How could Darlene be standing in front of him, smiling like she had a juicy secret to share? He’d never figure that out while she was oozing those pheromones that diverted all his brain power to his dick? “What about?” he asked.

“What about the towel?” She sat down. “Do you normally wear that outside or did Becky tell you I was coming?”

“No, no, I never wear a towel outside, normally. This is embarrassing. Let me go get some--”

“No, don’t, I like the towel,” she said. “It’ll make it easier for me to tell you why I’m here. It’s kinda embarrassing.”

“More embarrassing than wearing a towel outside?”

“Yes,” she said. “I probably shouldn’t say anything.”

“Yes, yes you should,” he said. “I gotta know now.”

“Alright, but you can never repeat it, seriously.”

He crossed his heart and said, “I swear.” He would have said anything to keep her there.

“Okay,” she said and crossed her arms under her tits, causing an eruption of freckled flesh to stretch the V-cut in her shirt. “I keep having this dream, and you’re in it.”

“Really,” he said. The fuckin’ redhead is dreaming about me?

“Yes, and part of the dream has to do with something that is really happening ... or not happening, actually. That’s the embarrassing part.”

“Hey, I’m wearing a towel outside ... just a towel, you can tell me.”

“Here goes,” she said. “In the dream, you’re the only one who can solve the problem I’m having. I come over here, and we have sex, and I have an orgasm. See, it’s crazy. I shouldn’t have--”

“No, it’s not crazy.” It wasn’t crazy, it was insane. “Aren’t you dating that guy with the Camaro?” Sex would be great, but he wasn’t sure he wanted to get beat up.

“Yes, that’s why you can’t ever mention this to anybody. Becky is the only person I’ve told. I trust her, and she said I can trust you.”

“You can,” he said. “You have the towel thing to hold over my head.”

“That’s true.”

“So, the part about you not having orgasms is true, and in your dream--”

“In my dream, we fuck, and I finally have one. Then the problem is solved,” she said. “Do you think I’m nuts?”

“No, not at all. Was I wearing a towel in your dream?”

“No, you’re naked.”

Play it cool, dumb ass, he told himself. “Good, that’s good. You told Becky, and she told you to come here?”

“Yes,” Darlene said. “She told me ... talked me into it.”

The idea of his sister knowing about it and wanting him to fuck Darlene made Jason’s lust surge into a new dimension of depravity. It would almost be like having Becky watch him have sex with Darlene. Ever since their mother caught them, being watched was one of his fantasies. “I’m guessing we’re not on the patio in the dream?”

“No, we’re in your room ... I guess it’s your room,” she said. “We have to do it the way it is in the dream, I think, to make sure it works. I hope it works because I’ve never had this kind of problem, and it sucks.”

“You ready?” he asked. He didn’t want to seem too eager, but he was afraid he might wake up from a dream of his own.

“Yes,” she said and stood up.

“After you.” He waved his arm in a sweeping motion, then got up and adjusted his towel so the overlapping ends weren’t in the front. No need to show her how ready I am, not yet.

Jason watched Darlene’s butt until she reached the door. Guys stopped in the hallway to watch that ass. It had never looked so good. Her stretchy black skirt clung to her like skin, and there was absolutely no allowance for bending without showing it all. He wished she would drop something, but she didn’t have anything with her.

Darlene walked toward his bedroom. Maybe she had been to his house. She stopped outside his door and asked, “Is this your room?”

“Yes,” he said and went in ahead of her, hoping there wasn’t dirty underwear lying around.

Darlene turned in a circle and said, “It could be the room from my dream, it’s hard to say. You know how dreams are.”

“What happens first?” he asked. “I mean in your dream.”

“I don’t know if we have to do it exactly the way it was, but we might as well try,” she said. “Stand here next to your bed, facing me.”

Darlene’s words were like sweet candy melting in his mouth. “We’re already making out whenever the dream starts, so we should kiss.” She ran a seductive finger down his chest, circled his belly, and went back up to his neck. His cock pushed against the towel.

Was it possible he was really going to fuck Darlene? Evan would not be happy.


Evan wasn’t happy to see Deana’s room empty. He had come home prepared to tell her they had to stop, had to make things right between them again. Thanks to Miss Tonya, he’d be able to think with his head, the right one. After what happened the night before, how could Deana not be home waiting for him? Where was she?

He’d have to ask Gloria because he wasn’t ready to see his mother. She might not know he fucked Miss Tonya, but she would see something on his face. Deana always knew when something was up. Evan went to Gloria’s room, opened the door, and her head spun toward him. “Hey, you’re supposed to knock.” She flipped her sketch pad shut, turned it over, and got up from her desk. “I could have been naked or something!”

Of all the things his sister could have said, that was the last thing Evan wanted to hear. Thanks, Jayda. “Sorry.”

“Don’t let it happen again.”

Evan rarely knocked, so why was Gloria suddenly making a big deal about it? He imagined Jayda in her room, sitting on some girl’s face. Gloria was right, Evan thought, he needed to knock, even though he knew Gloria wasn’t worried about him seeing her sitting on a girl’s face. What was she hiding? “Knock-knock, can I come in?”

“Mmhm.”

“Where’s Deana?”

“She’s at Rebecca’s,” Gloria said. “She’s spending the night.”

That sucked. Tomorrow, he’d be with Cindy at the race track, and Thursday, he’d have to go back to Miss Tonya’s. That was going to be weird. “What are you drawing?” he asked.

“Nothing,” she said.

“It’s something, and it’s something you don’t want me to see.”

“It’s not finished.”

“So, I’m your biggest fan,” he said. “Gimme a sneak preview.”

“I don’t think you’ll like it.”

“How will I know without seeing it?”

“I’d rather not show anybody.”

“I’m not anybody, and now I really want to see it.”

Gloria sat on the desk, on top of her pad. “No, you can’t,” she said. “It’s a secret.”

“It’s a secret, I won’t like it, it’s not done, which is it?”

She crossed her arms over her chest. “If I show you, what are you gonna give me?”

“Anything you want,” he said.

“Really?”

“Yup, if it’s possible. I can’t give you a million dollars or anything like that.”

“Okay, you promise?” she said, holding her pinky finger out.

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