“Alright, girls,” John began, starting the boat’s engine. “Last check. Have we got everything we need?”

“Yup!” Zoe chirped. “Towels, sunscreen, water bottles, and life jackets are under the seats.”

“Perfect,” John replied, putting on his sunglasses. “Let’s go have some fun.”

With a grin, John backed the boat away from the dock as Zoe and Oakley chatted up front. What a beautiful afternoon for a trip around the lake in the boat, he thought. The perfect way to spend some time with his beautiful daughters.

John and the girls zipped around the lake. The girls soaked up the sun as they sat in the front of the boat, mostly enjoying the lovely weather while occasionally chatting about boys or what they thought college would be like in the fall. Oakley wound up drinking the contents of two of the water bottles as they chatted. John expertly navigated the lake, zipping around curves and occasionally splashing the girls with water, eliciting groans of protest.

About half an hour into their trip, John brought the boat up along the northern shoreline. “Look at that,” he said, bringing the boat to a stop and gesturing to where the cell phone tower once stood along the railroad tracks. “That must have been some train wreck.”

The girls sat up, looking at the bulldozed shoreline.

“That’s so different from last year,” Oakley remarked. “Look how many trees are gone.”

“Not to mention the missing cell tower,” John added.

As Zoe and Oakley pointed out more differences in the shoreline, John sat quietly at the helm, his eyes exploring the girls’ bodies. They really are sexy, John thought to himself. Just like their mother was at that age.

His mind drifted, thinking back to the first summer he brought Patricia out to the lakehouse, back when his dad still owned the property. It had been such an incredible week. Patricia was so hot back then, just like the girls are now. He’d proposed to her on the shoreline on their first night there, and they spent the entire week celebrating their engagement in the best way possible, fucking like animals.

John remembered the second night of that trip, when he and Patricia went out on the lake and had sex in the old boat. It had been so hot, fucking her out there on the lake, the sound of the water lapping against the hull as she moaned and cried for more. John’s cock began to stiffen as he smiled at the memory.

As the sexual memories swirled in his mind, John became more and more turned on. At the same time, he took in the sight of his girls standing just a few feet away. His beautiful twin daughters. So much alike, and so much like their mother. I bet they’d be a couple of hot fucks, John thought as his eyes roamed over their bikini-clad tits and asses. John imagined himself sitting up front in the boat, Zoe and Oakley on their knees before him, licking and sucking his cock as he ran his fingers through their golden blonde hair.

A moment later, John came to his senses. Shocked at what he’d been thinking, he immediately diverted his eyes, looking at the gauge cluster in front of him. Snap out of it, he told himself. Those are your daughters, not some piece of meat.

John was in the middle of mentally reprimanding himself when a gentle touch on his shoulder made him jump.

“Sorry, Daddy,” Zoe apologized as his eyes darted up to meet hers. “I was just wondering, do you think I could drive the boat for a while? I feel like I could use the distraction.”

“Oh, um, yeah, sure,” John stuttered, trying desperately not to stare into the cleavage Zoe was practically shoving in his face. Doing his best not to let his raging erection show, John rose from the seat and switched places with Zoe. As she sat at the helm, he moved to the front of the boat.

Just as John was about to sit down across from Oakley, Zoe floored the throttle. Losing his footing, John fell forward, straight into his daughter. He reached out to try to catch himself, but he wasn’t able to move quickly enough, and all he caught was a handful of Oakley’s tits. Oakley’s eyes went wide, and she let out a little groan.

Almost immediately, John pulled his hand back and fell into the seat next to Oakley, his mind spinning. “Sorry about that,” he said, turning to his daughter.

“It’s okay, Daddy,” Oakley said, giving him a smile as her cheeks turned red.

For several seconds after the incident, the two just stared at each other. John’s cock only grew stiffer as he thought about how nice Oakley’s breast had felt. Looking into her eyes, John felt a hunger, something almost primal. His arousal grew stronger, and slowly he found his lips moving toward Oakley’s. Oakley felt it, too. He could see it in her eyes. She was so sexy. So fuckable. All he had to do was come a little closer. All he needed was to press his lips into hers.

Just then, the boat bounced, and John realized what he’d been thinking. He quickly turned his head, doing his best not to think about his daughter or how close he’d just been to actually trying to kiss her. "Good God," John thought. "Get ahold of yourself." John knew if he didn’t get away from his daughters soon, he’d do something he’d regret.

“Hey Zoe girl?” He found himself saying. “Why don’t you head back to our dock? I think I’m going to go four-wheeling for a bit while you two tool around on the boat."

Zoe nodded, steering the boat back toward their dock. As they traveled through the water, John kept his eyes firmly glued to the empty seat across from him and Oakley as he fought the urge to turn back toward his daughter. His mind was going a million miles an hour. Why was he so turned on? Why was he so desperate to fuck? Why was he thinking such depraved thoughts about his little girls?

About halfway back to the dock, John nearly jumped out of his skin as he felt Oakley’s hand gently touch his leg, just above the knee. He kept his eyes glued on the empty seat. He had to get these thoughts under control. He had to stop thinking about how fuckable his daughters were. Slowly, Oakley’s hand started rubbing back and forth on his leg, moving slightly higher. John could hardly breathe as he felt her hand moving higher, little by little. Soon, her fingers were barely brushing up against his cock, only making his erection harder. She wants it, too, he thought. She wants my cock.

By the time Zoe was about to pull up at the dock, Oakley’s hand was firmly over John’s cock, gently squeezing it through his shorts. John had never felt so conflicted in his life. He wanted nothing more that to grab his daughter, rip off her swimsuit, and fuck her brains out right in front of her twin sister. At the same time, John knew he could never do that. He could never fuck his flesh and blood. No matter how much he’d love it.

“Oh, look, we’re here,” John said, jumping up from his seat as the boat came near the dock. Without waiting for the vessel to come to a full stop, John leapt out onto the dock, saying a quick goodbye as he raced up the hill toward where the four wheelers were parked.

Zoe and Oakley watched him go, hunger in their eyes. Oakley considered going after him, but before she could act, Zoe reversed direction and pulled away. When they were far enough from the house that they couldn’t see their dock, Zoe brought the boat as close as she could to the shore and stopped.

“Did you say anything to him?” Zoe asked. “About Will and Mom?”

“I, um… no.” Oakley stuttered. “I guess I was feeling a little… flustered.”

“Yeah,” Zoe admitted. “I’m feeling flustered, too. Maybe we need a quick dip to cool off.” Oakley agreed and went to drop the anchor while Zoe lowered the ladder into the water.

Really, Zoe thought, she was a lot more than flustered. For reasons she couldn’t understand, she was horny as fuck. She tried to chalk it up to not getting an opportunity to have sex with her boyfriend before they left, but her need felt more urgent than she could recall ever feeling before. When she watched her dad running up the hill, all she could think was how much better it would have been if he’d stayed in the boat and fucked her instead. The thought was so dirty and so wrong, but Zoe was getting to the point where she needed a cock so bad that she’d even take her father’s.

Oakley was struggling even more with her desires. Part of the girl was thankful Zoe hadn’t noticed her hand on their father’s cock. She knew Zoe would have told her how wrong it was, but she didn’t care. Oakley hadn’t had sex in months, since she broke up with her ex, and all she needed right now was a nice hard cock inside her. A nice hard cock like her daddy’s. She should have done it, she told herself. She should have asked him to fuck her. Maybe he’d have stayed behind and filled her pussy. Maybe Zoe would have even joined in. It could have been so much fun to share her dad with her sister.

“Hey, are you coming?” Zoe asked as she climbed down the first rung of the ladder.

Oakley snapped out of her thoughts, her head pivoting toward her sister. “Oh, yeah, sorry. On my way,” she replied. As she headed toward the back of the boat, Oakley watched Zoe climbing down into the water. She’d always considered herself straight, but Oakley had to admit that if she was going to turn bi, she’d do it for Zoe. Her twin sister really was fuckable. Big tits, a nice ass, and on top of that, guys love it when twin sisters fuck. Oakley felt her pussy tingling at the thought of fucking Zoe.

As the girls splashed around in the shallow water, Zoe caught herself looking at her sister and wondering what it would be like to kiss her. She’d probably be a decent kisser, she caught herself thinking. She imagined their lips meeting, their tongues twisting together in pleasure as they pressed in against each other. Without realizing it, Zoe found herself moving closer to Oakley, gradually tightening the gap between them.

Oakley had been so distracted by her arousal that she didn’t notice Zoe until she was just a few feet away. She turned toward her sister, her eyes drawn to her tits as Zoe moved closer. Soon, the two were almost nose to nose.

Zoe was the first to speak, her voice quiet and shaky. “Can I make a confession?”

“Of course,” Oakley replied, a slight tremble in her voice as their eyes met.

“I’m really turned on right now. Like, more than ever before.”

Oakley swallowed hard. “You are? Because I am, too.”

Before another word could be said, Zoe lunged toward her sister, pressing their lips together in a fierce kiss. Oakley returned the kiss, closing her eyes and moaning as her tongue met her sister's for the first time. As their tongues began to dance, Oakley wrapped her arms around her sister, drawing her closer. The girls moaned and groaned, making out in the shallow water near the shoreline. Zoe grabbed Oakley's ass, desperately wanting to feel every inch of her sister’s body.

“Oh, fuck,” Zoe groaned between kisses. “We shouldn’t be doing this.”

“I don’t care,” Oakley groaned. “I need you so bad.”

“Let’s get in the boat,” Zoe groaned as Oakley trailed kisses down her neck. “Then we can fuck.”

Zoe and Oakley climbed the ladder in record time. As Oakley pulled Zoe in, the two girls collapsed onto the floor in the back of the boat, their lips meeting once again as their hands explored each other’s bodies. Oakley grabbed at Zoe’s blue top, untying it and freeing her tits. Zoe acted in kind, leaving both girls' tops on the floor of the boat. A couple of quick tugs of their strings, and the bottoms were gone as well, leaving the girls naked and wet, rubbing up against each other as their kisses burned hotter and hotter.

“I want to taste you,” Oakley groaned as Zoe kissed along her neckline. She shifted her body, slipping down lower on her sister, her lips exploring the girl’s frame as she went. When she reached her breasts, Zoe gasped as Oakley swirled her tongue over her right nipple. Next she travelled lower, kissing her toned abdomen. Her hands continued exploring Zoe’s body, her fingers running over the girl’s tits and up to her mouth, where Zoe eagerly sucked on them.

Finally, Oakley found herself between her sister’s legs, trailing kisses up and down the girls’ labia. With Zoe gasping for more, she dove in, parting her sister’s lips as she drew her tongue all the way up along Zoe’s dripping wet entrance. As she tasted her sister’s juices for the first time, Oakley knew she wanted more. She lapped at her again and then again. Soon, she was hungrily working, eating out her twin sister.

“Oh, fuck,” Zoe groaned, running her fingers through Oakley’s hair. “That’s so good. So fucking good. Come over here so I can taste you, too.”

Oakley shifted her body as she worked, turning so her pussy was directly over Zoe’s mouth. Almost immediately, Zoe dove in, lapping at her sister, loving the taste as their desires drove them wild with lust. Zoe had never been with a girl before, but if they all tasted as delicious as her sister, she knew this wouldn’t be the last time.

For what felt like eternity, the two remained there, lapping at each other’s pussies as they 69’ed in the back of the boat as it gently rocked on the water. The sounds of their moans filled the air. The scent of their arousal spurred them on. Soon, both girls were squirming and bucking as they felt their orgasms approaching.

Oakley was the first to come. Zoe had slipped a finger inside her as she flicked her clit with her tongue. The sensation drove Oakley over the edge, causing her to cry in pleasure as she buried her face in her sister’s pussy. Determined not to let Zoe go unsatisfied, Oakley pushed through her orgasm, eating Zoe out as best she could as the pleasure coursed through her. Soon, Zoe was coming, too, crying out in ecstasy. Oakley spun around, finding her sister’s lips once more, and the two made out passionately as they slowly came down from their orgasms.

Once the girls had come down from their orgasms, the lust-fueled fog in their minds started to clear, and they realized what they’d just done.

“Oh my God,” Zoe said, sitting up in the back of the boat. Oakley, I don’t know what came over me. I’m so sorry.”

“No, it’s okay,” Oakley replied, grabbing her swimsuit off the floor and sitting up herself. “I guess I kinda lost my head too. Are you okay?”

Zoe nodded, and slowly, the girls began getting dressed.

“What’s going on with us?” Zoe asked.

“I don’t know,” Oakley replied, “but whatever it is, I think it’s affecting all of us. I didn’t want to say anything, but on our way back to the dock, Dad was looking at me like he wanted me, and I just about let him take me. I even felt him up a little. It was like I couldn’t help myself.”

“Wow,” Zoe commented, shocked to feel a twinge of jealousy. “We really need to talk to Dad. Probably Mom, too.”

“If it’s not too late for Mom. She’s already been here a week. You saw the way she was looking at Will. Oh my God, Zo. You don’t think Mom and Will are—”

“Stop it,” Zoe said, holding up a hand. No, that’s not possible. Will’s her son.”

“And I’m your sister, and look at what we just did. I’m telling you, we’ve got to figure out what’s going on and stop it before we’re all just a bunch of uncontrollable animals.”

Zoe nodded. “You’re right. Okay, let’s get back to the dock and tell the others. I’ll go find Dad. You find Mom. And we’d better act fast. I’m already feeling a little horny again.”

“I know,” Oakley confessed. “Me, too.”

The girls climbed up and headed back to the dock. By the time they arrived, their arousal was already starting to climb. They tied up the boat and climbed the hill toward the lakehouse.

Oakley went inside to look for their mom, and Zoe jumped on her four wheeler to head off in search of her father.

Deep in the woods, John was pacing alongside his four wheeler, desperately trying to control his thoughts. He’d already jacked off once, thinking of Oakley’s hand on his cock the entire time. He was able to get a grip on his thoughts for a little while afterward, but before long he found his desires creeping up once more, slowly overriding his morals again.

Just as he was about to try jacking off again to buy himself a few more minutes of clear thinking, he heard a rumbling noise, like an approaching engine. Turning his head down the trail, he saw Zoe approaching on her four wheeler.

“Dad!” Zoe shouted, coming to a stop a short distance away. “I’ve been looking for you.”

“That’s, um, that’s nice,” John said, drinking in his daughter’s sexy curves. “But maybe you should head back to the house, and I’ll catch up. I’m just feeling a bit—”

“Turned on?” Zoe asked, finishing his sentence as she shut off her vehicle and hopped off. “Yeah, Dad, I know. Oakley and I have been feeling it, too. That’s why I came to find you. I think something is going on.”

“What do you mean?” John asked, stepping closer to Zoe.

“I mean, I think something is making us horny. Think about it, Dad. What have you been thinking about all afternoon?”

“Well, sex,” John answered honestly, feeling his cock begin to harden in his shorts. Zoe noticed too; her eyes were momentarily drawn to his growing bulge before she brought them back up to meet his.

“But it’s not just sex, is it? It’s like the strongest urge for sex ever. Like a desire so strong that you’d fuck anyone, wouldn’t you?”

“I mean, yeah, it’s strong, but it’s not like I’d really—”

“Dad, be honest. What are you thinking about right this second?”

John swallowed hard. “Oh, Zozo, I really don’t think I should—”

“It’s me, isn’t it?” Zoe asked, taking another step closer. “You’re so turned on that you’re considering fucking me, aren’t you? You’d fuck me, your daughter, right here in the woods while your wife is just down that trail, wouldn’t you? That’s what you’re thinking, isn’t it?”

John could only nod in reply. He breathed deeply as he looked over his daughter’s body. The swell of her breasts. The curve of her ass. She really was so hot. So fuckable.

Zoe found her own mind beginning to get lost in her lust as well. She hadn’t wanted to feel this way. She was trying to find her dad to get his help to stop this. But now, seeing his erection tenting in his shorts and confirming that he was in fact thinking about fucking her, Zoe couldn’t help but wonder what it would be like to let him take her, to give herself to her own father.

“If I’m being honest,” she added in a much softer tone as she strutted slowly the rest of the way up to her father, “I’m thinking about you, too. I can feel it growing inside me. I know it’s wrong. I know I shouldn’t feel this way. Not about you, not about my dad, but it’s like part of me needs it. Part of me needs to be fucked. Part of me needs to feel a cock inside of me.” Zoe stood nose to nose with her father, barely whispering as she reached out and draped her arms over his shoulders. “Part of me needs you to fuck me, Daddy.”

John let out a little gasp as the last of his resolve evaporated in the warm mountain air. He peered deep into his daughter’s eyes, only finding lust in return. He could feel his need growing inside him, a need far too powerful to solve through masturbation. He needed release, and here was his sweet, fuckable daughter, all but offering herself to him.

In an instant, John grabbed Zoe by her shoulders, pulling her lips to his. Their tongues met, dancing to the groans of their desire as their hands explored one another.

Almost immediately, Zoe’s hands traveled down to the father’s shorts, slipping under his waistband and fishing out his cock. It felt so perfect in her delicate fingers. She found herself groaning into her father’s mouth as she slowly stroked his shaft. This was it, she realized. This was what she needed. It was so wrong to be doing this, to be stroking off her dad as they made out like lovers. She didn’t care. All she wanted was more, to feel him penetrating her, pushing inside her, filling her up.

At the same time, John’s hands found their way to his daughter’s tits. He pulled down her top, exposing her breasts to his hands as they began kneading them and groping her. He’d never wanted someone as bad as his daughter in that instant.

A moment later, John broke off the kiss. Taking hold of Zoe’s bikini bottoms, he pulled them down to the ground, revealing her neatly trimmed pussy. His cock throbbed as he spun her around, bending her over the seat of his four wheeler. Zoe spread her legs wide, letting out a groan as she felt her dad’s cock begin grinding against her pussy lips.

“Is this what you need?” He growled, sliding the tip of his cock up along her wetness. “Do you need my cock?”

“Oh, fuck, yes,” Zoe groaned. “I need it desperately. Please, Daddy, fuck me! Oh, fuck, please do it!”

John let out a grunt as he lined himself up and pushed his way into his daughter. Somewhere in his mind, he knew how wrong this was. Back in the far recesses of his mind, a voice told him he shouldn’t be doing this. He shouldn’t be sliding his cock inside his little girl. But John was too far gone to care about that voice. He needed this. He needed to fuck.

When he reached bottom, John pulled back, then plunged back into Zoe, eliciting a moan of pleasure from the girl. He went on to do it again. Then again, and again, and again, and again. Over and over, he slammed into her pussy, making her whole body shake as he thrust into her, pushing her up against the four wheeler.

Zoe cried out in pleasure. “More!” She begged. “Oh, fuck, Dad! Give me more! Oh, yes. Oh, fuck,” she cried as he stared jackhammering into her. “Just like that! Fuck me like that!”

Zoe’s speech dissolved into gibberish as her dad continued slamming into her. With each thrust, she moved closer and closer to her orgasm. She could almost feel it, as though it was building inside her, just waiting to let go. She screamed, her voice echoing through the forest as John told her how much he loved fucking her, how tight her pussy was on his cock.

Finally, Zoe couldn’t take it anymore. With one last scream, she started shaking, her whole body coming to life as the most powerful orgasm she’d ever experienced coursed through her body. It was like a million volts of pure pleasure passed through her.

As she came, Zoe’s pussy clamped down on her father’s cock, driving him over the edge. With one final thrust, John leaned into Zoe, groaning as his cock exploded inside her, pumping her pussy with the largest load of white-hot cum that he’d ever produced. John rode out his orgasm, reaching around Zoe and grabbing her tits, groaning and jerking as his cock throbbed inside her.

This time, as the fog in her mind began to lift, Zoe found herself still feeling surprisingly positive about what they’d just done. As her father slowly pulled out, releasing a stream of cum gushing down her leg, Zoe found herself smiling. Was it wrong to fuck her father? Probably. At the same time, she’d never had an orgasm like that. If her dad could keep making her come the way she just did, she realized, maybe fucking her father was worth it.

Turning to face her father, she couldn’t help but smile at his cock, still coated in their juices. Before John had the chance to object, Zoe dropped to her knees, taking him in her mouth, savoring the flavor of their mating as she lovingly began sucking him off. In no time at all, John was groaning, letting Zoe know that he was close to coming again. As she swallowed down his incestuous load, Zoe’s mind drifted to Oakley, wondering if she had any luck with their mom.