Family Therapy
Copyright© 2026 by Vanpeebles
Chapter 6: The Conspiracy Cums to a Head
Incest Sex Story: Chapter 6: The Conspiracy Cums to a Head - Upon discovering their eldest son and daughter are having sex, a couple consults a therapist, who plots to have the whole family, as well as her own, join them.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa mt/ft Ma/ft mt/Fa Fa/Fa ft/ft Fa/ft Ma/Ma Mult Teenagers Consensual BiSexual Fiction Incest Mother Son Brother Sister Father Daughter Group Sex Orgy Anal Sex Analingus Cream Pie First Masturbation Oral Sex
That Saturday, Charles, Alex, and Molly left to go to a Taylor Swift concert in Chicago. Originally, Alex had been going to go with her friend Jennifer, and Jennifer’s mother was originally going to drive the girls to the concert, but Jennifer got sick, and she and her mother had to bow out. While he had no great enthusiasm for seeing Taylor Swift, Alex had been looking forward to the concert—it would be her first—so they bought the two tickets from Jennifer’s mom, and Charles agreed to drive Alex and Molly the three and a half hours rather than disappoint his daughter. He also figured it wouldn’t be so bad; he probably wouldn’t be the only dad there.
Zach was off visiting a friend for the day, leaving Pris alone in the house. So at the end of a day of peace, alone and free of the children, Pris decided she needed a nice, long, relaxing bath.
She drew the bath, slipped into the water, closed her eyes, and put her head back, luxuriating in the comfort. It wasn’t long before she felt that familiar tickle between her legs, and unconsciously her hand slipped over to allow her fingers to gently play with her labia. She pictured Charles doing it to her, but that vision was quickly replaced with Carter. She imagined her young lover had his face between her legs as she began to circle her clit with her finger.
Then Carter morphed into Zach. In her mind it was her own son who was pleasuring her. She immediately thought it was wrong, but she couldn’t fight the fantasy and went with the flow. She pictured her boy’s tousled, light brown hair between her legs. She slipped two fingers into her now wet vagina, and Zach, her lovely boy, was now fucking her, thrusting in and out of his mother.
“Do you want a back rub, Mom?”
The voice startled her. For a moment she wasn’t sure if it was real or part of her fantasy. But she opened her eyes, and Zach was standing beside the tub. He had come back early
Pris scrambled to close her legs and cover her breasts with her left arm. “What are you doing here?”
“I live here,” said the boy. “I was just wondering if you wanted a massage?”
“That’s not appropriate. I’m naked.”
Zach knelt down and placed one hand on her shoulder. “I can help you relax, if you want.”
His touch made her tremble. She knew she should yell about respect for privacy, but she couldn’t. She just closed her eyes again and focused on his hand that was on her shoulder.
Then his other hand touched her other shoulder, and he gently started to knead her shoulders and neck. Wordlessly, she gave in and sat up, turning to give him better access.
It wasn’t the most skilled massage, but that didn’t matter. Her boy was touching her naked flesh. His hands slipped down and cupped her breasts. She could feel his warm breath on her neck. She turned her head and their lips met. She let his tongue slip into her mouth as he massaged her breasts.
She broke the kiss and said, “Get me a towel.”
Zach did so, and she rose out of the water. She watched her boy run his eyes up and down her body. His eyes grew wide as he got the first good look at his mother’s naked body since he was old enough to appreciate it. Pris got a thrill knowing the sight excited him.
Zach gently toweled his mother dry, occasionally interrupting to kiss, sometimes her lips, sometimes her nipples or belly.
It was at this point that Pris made the conscious decision to fuck her son. Up until now, she had let hormones control her. Maybe they were still doing so, but if so, she made the decision to give in to them.
She tugged his T-shirt up and off, taking a moment to admire his slim, hairless chest. Then she started to unbuckle his pants. Zach kicked off his sneakers—he wasn’t wearing socks—and his pants dropped to the bathroom floor.
She knelt before him, tugged his underwear down, and his cock popped right up. It was nicely sized and shaped, not as large as Charles’s, but the boy was only sixteen. She took it into her mouth, sliding down the length of the shaft while letting her tongue play along the underside. Zach moaned.
His cock tasted and smelled good, musky but clean with a salty hint of precum, but what really thrilled her was that this was her son. This was wrong, yet it felt so good. She wanted it inside of her so badly, but for the moment she was enjoying the pleasure she was giving to her darling boy.
For his part, when Zach had slipped into his mother’s bathroom he had been afraid. He knew what Dr. Wilson had told him to do, and being alone with her in the house and her being in the bath seemed the perfect opportunity. Angela had confidently told him that his mother would fuck him at the drop of a hat, but he only half believed her. But she had been right. His mother was sucking his cock!
Pris let Zach’s cock slip out of her mouth and pushing it up against his stomach took his balls into her mouth, and then she tongued his taint. She could feel him tremble as he experienced a new erogenous zone. Feeling he was ready, she went back to sucking his cock, and soon he was pumping his semen into her mouth, which she devoured without spilling any. Her own son’s cum!
She stood and kissed her son, giving him a taste of what cum remained in her mouth. Then she led him into the bedroom. Laying down on the bed, she spread her legs and said, “I want you to eat your mommy’s pussy. Did you eat your sister?”
He nodded, still not quite believing Dr. Wilson’s plan had worked.
“Did you make her cum?”
He nodded again.
“Good. Now make Mommy cum, just like you did to your sister.”
The teen complied. Zach lay down between his mother’s legs and got his first closeup look at her pussy. It was shaved clean, hairless like Molly’s, and the engorged inner labia were poking through the outer, like a flowering orchid. He took his first tentative lick, parting the lips even further, tasting, for the first time, his mother’s juices. Then he tackled the job in earnest, plunging his tongue as far into her vagina as it would go, before moving up and licking and sucking the clit. Pris’s thighs clamped around his head as she bucked and rode out her first orgasm. There would be more to come.
Again and again, waves of convulsions swept through her, with only brief periods in between allowing her some respite from the onslaughts of pleasure. Finally, during one of those periods she decided that she needed to have him inside her.
With some reluctance, she pushed his head away from her crotch and guided him up so they could kiss. As their tongues interlocked, she could feel Zach’s cock against her thigh. It was hard again. She reached down and guided it to her thoroughly wet pussy. The head slipped effortlessly inside, then Zach plunged it deep.
Pris moaned. Her own son was inside her.
Zach started thrusting in and out quickly.
“Slow down,” she said. “We have time. Enjoy your mommy’s pussy.”
Dutifully the boy complied, and she reveled in the feeling of her son’s cock inside of her. It wasn’t as large as Charles’s. It was about the same size as Carter’s, but this was so much more pleasurable. The breaking of the biggest taboo. The tantalizing idea of being impregnated by her own son—even though she was on the Pill, the very thought that it could theoretically happen almost brought her to orgasm by itself.
She opened her eyes and looked up at her boy and the angelic determination on his face made it happen. She shuddered with another orgasm.
Then she told him to go faster. He started pounding in and out of her, sinking deep before pulling almost all the way out before sinking deep again. It was simply delightful.
There was another round of convulsions, and she felt Zach deflate inside her. He had cum too.
He slipped out of and rolled off her. They cuddled and kissed, and Zach fell asleep in his mother’s arms.
For her part, Pris stayed awake for a while, pondering what had happened. She had fucked her own son! She had cheated on Charles! Fucking Carter and Thea hadn’t been cheating, because he was there and fucked them too. But this ... this crossed a line. Her head told her it was wrong, but her heart delighted in it. Could she tell Charles? How? How would he react? He was sexually liberal, but she didn’t think that liberality extended to incest, certainly not with his own children. Was this a one-time thing? Or would she continue to fuck Zach? If she had her way, it wouldn’t be. She didn’t want to stop.
She eventually fell asleep, still in Zach’s arms. If she dreamed, she didn’t remember it.
When she awoke, the sun was peeking through the bedroom window, the rays falling on her darling, angelic boy, still asleep. She reached out and touched him. He was hard. Morning wood.
She threw off the covers and moved down to take him once again in her mouth, sucking him awake.
Zach opened his eyes to see his mother sucking on his cock, bobbing her head up and down. He moaned and closed his eyes again.
Pris took this as her cue and straddled her son, slowly lowering herself onto his cock. Then she started rocking back and forth, allowing it to slide in and out of her. She brought herself to two more orgasms before she felt her son tremble and pump his seed once again into her womb.
She looked down at him and realized that now she had crossed the line, she could never go back.
Charles enjoyed the concert more than he thought he would. The music wasn’t exactly his style, but it was fine. Taylor Swift put on a really good show, and the enthusiasm of the Swifties in the audience was infectious. And despite his fears that he would be surrounded by teenyboppers, he was far from the only adult in the audience. There were a number of parents there and even adults sans children. Best of all, Alex and Molly had a fantastic time, which alone made it worth it.
But it was getting late by the time they got back to the hotel—it was too late and home too far away by the time the concert ended. They had two rooms which were joined by a connecting door. There was some coming and going by the girls between the two rooms before Charles declared that it was late and he needed to sleep. So he told the girls to keep the noise down as there were undoubtedly other guests on the floor and closed the door between the rooms. The thought of locking it did not cross his mind.
He slipped between the covers but did not immediately drift off to sleep. For some reason, that last therapy session, if you could call it that, kept coming to mind, and he felt that familiar stirring in his loins. He thought about jerking off, but that didn’t seem right with his daughters in the next room. After a while, though, his eyes grew heavy and started to close.
But just as he was about to slip into dreamland, he was startled awake.
“Daddy,” Alex whispered.
Charles’s eyes snapped open to see his older daughter standing at the foot of his bed.
“What, Alex?”
“Molly is making noises in her sleep. Can I sleep with you?”
“I guess so.”
Alex tucked herself against his side, stretching her arm across his torso. He tried to go to sleep again, but his cock was stirring again. It wasn’t right. He tried to will the lust away, but it didn’t work. He tried to convince himself that it was just a physical reaction to having a female body next to him, that she was his daughter, and that it didn’t mean anything. But he felt Alex’s hand gently rubbing his stomach, making its way down to his groin. He meant to move her hand away, but for some reason he couldn’t. Then her hand brushed up against his cock beneath his boxers, and it sprang to full hardness.
Charles reached down and tried to move Alex’s hand away, but she nibbled on his ear.
“I want you so bad, Daddy,” she said.
He was frozen. He could feel her warm breath on his ear as her hand stroked his cock. Finally, he mustered the ability to say softly, “This is wrong, I’m your father.”
“I know. That’s what makes it special.”
“But your sister is in the next room.” That was a miserable excuse; his resolve was breaking down.
“We can be quiet. She won’t hear.” Then Alex shifted and kissed her father on the lips.
Charles found himself returning the kiss.
Alex slowly moved down his body, planting kissed down his torso until she reached the V between his legs, at which point she extracted his cock from the fly in his boxer’s.
“You have a big cock, Daddy. Can I kiss it?”
Charles nodded weakly. He could no longer resist.
Alex planted a small kiss on the head and looked up at her father and smiled. Then she looked down and engulfed his cock with her mouth.
Alex couldn’t quite believe what she was doing. Dr. Wilson had coached her, telling her that being aggressive and calling him “Daddy” would do the trick, and it had worked. She was sucking her father’s cock! She hadn’t known how badly she had wanted this until Dr. Wilson unlocked that desire. His cock was as big as Bill’s but somehow sucking her father’s cock excited her more. She wanted it inside her, but that would have to wait a few minutes.
Charles was in a similar state, only more surprised. His daughter was sucking his cock! He closed his eyes and enjoyed the sensation, imagining what it would be to fuck his little girl.
Just as he thought that Alex started tugging at his boxers, so Charles raised his hips so she could pull them off. Then Alex slipped out of her panties and t-shirt, straddled him, and lowered herself onto her father’s waiting cock.
Charles felt the warm and wet sheath engulf his member. It was delightful. In some ways not any different than fucking Pris or even Thea, but the wickedness of this being his little girl made the pleasure so much more enjoyable.
Alex moaned softly, “Oh, Daddy, that feels wonderful.”
He looked up at his daughter whose eyes were closed, enjoying the feeling. Then she started to shake. She was cumming. He followed shortly, spewing his seed into his own daughter.
Then, Alex did something unexpected. She continued to ride him, sliding up and down his cock, which did not deflate. That had only happened once or twice to him before when he and Pris were going at it hot and heavy; he had on those rare occasions, as he did now, kept his erection.
Then Alex looked down at him and said, “I want you on top of me.”
Charles grabbed his daughter and tried to flip over, but he couldn’t do it without slipping out of her. But after a moment of rearranging their bodies, he was on top of her and began penetrating her. Alex wrapped her arms around his neck and locked eyes with him. He began slowly thrusting in and out.
“Fuck me harder, Daddy,” said Alex. “I want to feel your strength.”
Charles picked up the pace of his thrusts and soon he was pounding his daughter hard.
“Yes, yes, yes! Fuck me, Daddy! Fuck me!” But soon Alex’s words degenerated into moans as she came again and again.
Having come once, Charles’s second orgasm of the night was slow to build, but after she had cum multiple times, he finally spurted his semen into her once again.
He rolled off of her, and Alex turned on her side. The pair kissed again, their hands gently caressing one another. Then a pang of guilt ran through him. He had just fucked his daughter!
“That was wonderful, sweetie, but we shouldn’t have done that.”
“Why not? It was fun, and I love you, Daddy. Didn’t you like fucking me?”
“No, I loved it, and I love you. Nothing can change that. But fathers and daughters shouldn’t be doing this.”
“Why not?”
“It’s just wrong?”
“Why?”
“I don’t know. It just is.” It wasn’t a good answer he thought to himself, but he couldn’t think of a better one at that moment.
“Well, I want to fuck you again.” Then she reached down and touched his soft cock. “I don’t mean right now, but later. I want to keep fucking you.”
Charles had no answer. He just held her and eventually fell asleep.
When she was sure her father was asleep, Alex slipped out of the bed and returned to her own room.
“I peeked and saw that you and Daddy were fucking,” whispered Molly.
“You shouldn’t have done that. What if he had seen you?”
“I was careful, and he didn’t. I so much want to fuck him. When will I get my chance?”
“Soon, maybe tomorrow night. Did you play with yourself after you had watched us?”
“Oh, yes. It was so hot. I came three times. Did Daddy cum inside you?”
“Twice.”
“Is it still inside you? Can I taste him?”
Alex quietly laughed and lay down on the bed, her legs spread.
Molly needed no further invitation. She leapt between her sister’s legs, and with long laps at her sister’s slit, she scooped out what remained of her father’s cum, swallowing the salty goodness. When that was gone, she continued lapping at Alex’s cunt, bringing her to yet another orgasm. The two sisters fell asleep in each other’s arms.
Charles awoke the next morning. Did last night happen? Or was it a sex dream? But the damp spot on the bed and the dried juices on his cock told him it had. He showered and dressed, and when he heard the girls stirring in the room next door, he knocked.
Alex opened the door, smiling slyly at her father but only saying, “Morning, Daddy.”
Now was not the time to review what had happened the night before, certainly not with Molly in the room. So he only said, “Breakfast in half an hour?”
“Sounds good,” said Alex.
And forty-five minutes later—the girls were pathologically incapable of getting ready on time—they headed down to the restaurant for breakfast. They chatted about the concert. But Alex kept looking at him and smiling. Then, when Molly was at the buffet, Alex reached under the table and put her hand in his crotch, groping his cock through his pants.
“I loved last night,” she said.
Charles did not respond, and her hand was withdrawn when Molly returned to the table.
When Charles and the girls arrived home, he kissed his wife, but neither adult said anything about what had happened while they had been away.
The next day was Presidents’ Day, so the kids had off from school, and neither Pris nor Charles had work. But the kids had plans. Plans, or more accurately schemes, that had been cooked up and orchestrated by Dr. Wilson. Plans that centered around Zach.
So far everything had unfolded pretty much as Angela had planned. Both Pris and Charles had become sexually involved with their children, but separately. Now the final step would be to bring them together, and Zach, Dr. Wilson told them, was the key to that. Pris had already fucked him, and Charles’s long pent-up bisexuality made the boy the one to bridge the gap.
Zach was ready for this. A few weeks ago he had never thought of sex with a man, but now he knew for certain that he was bisexual. Fucking his sister Alex had started as just a way to relieve teen horniness. Sure, it was breaking a taboo and that was exciting, but it wasn’t the main reason he had fucked Alex. It was fucking Molly that really turned him on to the idea of incest. Then there was Mom. Once he was bitten by the incest bug, he couldn’t get the idea of her and her big boobs out of his mind. Then there was Dr. Wilson who introduced him to sex with guys. So the idea of fucking his dad was the next natural step.
Zach descended the stairs to the basement where his father was busy in his workshop.
“Whatcha doing, Dad?”
“Trying to get this shop vac working again so I can clean out the garage,” Charles answered without looking up.
“Need any help?”
“It’s a one-man job. But I could use some help in the garage if I get it working again.”
Zach moved behind his father and put his hand on his shoulder. Charles turned and found himself face to face with his son. With their faces inches away, Zach raised himself up and kissed his father on the lips.
“What was that for?” said Charles.
“You can’t tell me that you haven’t been thinking about that.” Zach ran his hands down his father’s sides. “I’ve been thinking about kissing you all this week.”
“I ... I...”
Zach kissed him again. This time Charles returned the kiss, grabbing his son by the waist and pulling him into him. He was confused. His world had been thrown upside down in these past weeks. He had sex with a man for the first time in nearly twenty years. He had a foursome with Pris and two teens. He had slept with his daughters. Now his son was coming onto him. The only certainty was that in that moment he was horny and wanted Zach.
Zach dropped to his knees and started unbuckling his father’s belt and unzipping his fly. He could feel his dad was already half hard. He tugged his dad’s pants and underwear down, letting his cock pop free. It was big, but not any larger than Bill’s had been. He ran his tongue around the head, tasting his dad’s precum. Then he took the head in his mouth and worked his way down the shaft.
Charles couldn’t quite believe this. His son was sucking him off. And he was rather good at it.
Alex and Molly watched Zach go down the stairs to the basement. They waited a few minutes and then crept down the stairs after him, careful not to make any noise. At the bottom they peeked around the corner and saw Zach sucking their father off. Then they crept back up the stairs. Alex kissed her sister and said, “I’m going to find mom. I wish you could do this with me, but Dr. Wilson said it should just be me. Mom might react badly to the idea of her baby having sex.”
“I’m not a baby.”
“I know. Believe me I know, but mom still thinks of you as one. Your turn will come tonight.”
They kissed again, and Alex watched as her little sister went upstairs to her room. Then she went to find her mom.
Pris was in the kitchen. When Alex entered, she said, “I’m trying to think of what to make for dinner. What do you want?
“I want to show you something,” said Alex.
“What?”
“It’s kind of a surprise. Just come with me, Mom.”
Pris shrugged and followed her daughter to the top of the basement stairs.
“You have to be quiet,” said Alex.
“What’s going on?” said Pris. She knew her daughter well enough to know that something was up. Probably a prank she was playing on their brother.
“Just come into the basement with me, but you have to be quiet.”
So the pair crept down the stairs where Pris saw her son going down on her husband.
She shivered as an erotic pang ran through her. Just yesterday she had been fucking their son, and now her husband was doing it. Seeing him with another man was sensual enough but seeing him with their son was on another level. And she marveled at her son sucking cock. Where had he learned that?
She watched as Charles made the boy stop his sucking. He stood Zach up and kissed him. Pris trembled as her husband removed the boy’s T-shirt and ran his hands gently over the teen’s torso, playing with his nipples. She watched as Zach unbuttoned his jeans and slid his jeans down. Charles then knelt, and she watched as he took their son’s cock in his mouth.
“Do you like watching this?” Alex whispered.
Pris nodded in response. She did like it. She knew she shouldn’t, but she did.
“Did you know that Daddy liked boys too?”
Again she nodded. She continued to watch as her husband’s head bobbed up and down their son’s cock.
Zach groaned, and Pris watched as her son came in her husband’s mouth. Then Charles stood, and father and son kissed again.
Zach broke the kiss and bent down, retrieving something from the pocket of his jeans. He held up a tube of KY jelly. “I want you to fuck me, Dad. I want you to be my first.”
Pris stifled a yelp. She watched as her husband kissed the boy again, taking the lube from Zach’s hand. He bent their son over the workbench, knelt behind him, and started eating his ass. Charles had never done that with her or asked her to do it to him.
She continued to watch for several minutes. Then Charles stood up, kissed his son again, and dripped some lube into Zach’s ass crack. He massaged the lube in, and Pris could see that he was penetrating their son with a finger.
At that moment she could see Zach tense up, and Charles said, “just relax. It will be easier and more fun if you can.”
Pris watched her son bite his lower lip and then visibly relax. Charles worked his finger in and out for a few minutes. Then he rubbed lube on his own cock and positioned it at Zach’s rosebud. A gentle thrust, and his head was inside his son.
Pris bit her finger to keep from crying out as Charles slowly pushed deeper into their son. She wanted to run and join them, but her feet were rooted in the spot.
“Daddy likes boys,” whispered Alex.
At this Pris turned to her daughter, who was looking at her with lust in her eyes.
“Come with me.” And with that Alex took her mother by the hand and led her up the stairs to her bedroom.
Although Zach knew that the plan had called for Alex to lead Pris to them, neither Charles nor Zach had been aware of the women’s presence or departure. They were too engaged with each other to notice.
Zach had displayed a coolness throughout this encounter, although inside he was roiling with fear. Dr. Wilson had assured him that his dad was bi and that the worst thing that would happen would be his advance would be rejected. But that didn’t stop the teen from worrying. And then there was the prospect of being fucked in the butt. The plan didn’t strictly require that, but he thought that if he was going to seduce his dad, he might as well go all the way, and that’s what guys did with other guys, wasn’t it?
Anyway, the prospect of having a dick up his ass was daunting. And when he first felt his dad’s finger he tensed up. But after his dad told him to, he tried to relax, and what had been a strange sensation—not pain exactly, but some kind of violation—soon turned to pleasure as he discovered what a prostate massage felt like.
Then there was a pleasant relief as the finger withdrew, only to be replaced by feeling of his father’s cockhead pressing against his virgin anus. There was moment of discomfort as the head popped through the sphincter, then a delightful feeling of being filled. Although it was much bigger, his father’s cock felt much better than the finger, firm but yielding, as opposed to bony. As his father pushed deeper, the pleasure increased, and as the cock started sliding in and out, the constant stimulation on his prostate became more intense and enjoyable.
For Charles, the physical sensations were familiar. He had topped several men in the distant past, and topping Carter the other day had brought those memories to the fore. But while physically sliding in and out of a tight anus was pretty much the same, the emotional impact was far more intense. This was his son!
He looked down at the boy, his slim, smooth back and his round, hairless ass cheeks that he was sliding in and out of, the mop of light brown hair. Zach was emitting groans of pleasure, and he was the cause of it, creating those sensations in the boy that he loved. He had never fucked a man that he had loved.
He watched as Zach reached down and stroked his own cock, which had become hard again already. Oh, the joys of being a teen with a near-zero refractory period. Zach stroked himself to another orgasm, spewing his cum over the floor of the workshop.
Charles came soon after, filling his son with his seed. He stopped stroking and let his cock continue to pump until it softened. Then he slowly withdrew. He took Zach into his arms, and they kissed.
The older woman was in something of a state of shock. She was trying to process what she had just witnessed, so she allowed her daughter to lead her up two flights of stairs to the girl’s bedroom.
“Did you like what you saw?” asked Alex.
Pris finally found her voice. “Now, Alex what we just saw...
“Did you like or not?”
“That’s not the point. The important...”
“I know you fucked Zach.”
That stunned Pris. She just stared at her daughter.
“So Daddy like boys and girls, and you like boys, the only question is do you like girls, too?”
Pris just continued staring at the young vixen that her daughter had turned into.
“I just wanna know if you want to fuck me, too?” Alex brushed the back of her hands against the sides of Pris’s breasts as she said this.
“It’s not right...”
“So it’s okay to fuck your son, but not your daughter? I can tell you’re horny after watching those two beautiful men. Don’t you want to fuck me?”
Pris looked into her daughter’s eyes which were staring plaintively back at her. She couldn’t answer. The answer was yes, but she couldn’t bring herself to say, or do, it.
“If you don’t want to fuck me, that’s okay. I just want to fuck you, Mommy. I’m horny as hell, and I don’t think Zach will be able to get it up again for a while.”
Pris couldn’t hold back any longer. She grabbed her daughter by the waist and pulled Alex into her, kissing her deeply. Alex eagerly returned the kiss.