"Oh, Gramps, what big eyes you have, and what big teeth you have, and what a massive cock you have." Joyce stood up, puzzled, gazing at her mother and then back at Gramps; were they genuinely starting something?

June exited the room without saying anything else, leaving her empty cup on the table. Joyce could only see the large bulge in Gramps' trousers, which scared her slightly. Her cuddly, loving grandfather was erect for his own daughter; Joyce was perplexed by how many times he had visited while Dad was away, there to screw her mother. Gramps smiled kindly at Joyce before leaving the room to follow June upstairs.

Joyce was left astonished and confused about what to do. She felt damp, knowing that the sight of his bulge had aroused her. She sat back down, lost in thought. She had seen other guys in the house while her father was away, and the images confirmed that her mother had been sleeping with multiple men, including her own father. A commotion from upstairs jolted her out of her reverie; looking at the clock, 10 minutes had passed. There was another sound, and Joyce knew exactly what it was.

With her heart hammering, she stood still, as if in a trance, attracted involuntarily to a dark secret. With each tread up the stairs, her mother's moans grew louder; wet slurping noises filled the hall and landing, and the bedroom door was wide open as she neared. The scene before her eyes caused her to freeze; she was torn, an emotional wreck, and had no idea what to think or do. The little girl within wanted to run away and hide in her room as if everything was a bad dream, but the woman inside desired what her mother was having. But she couldn't move; as if under a deep spell, she was rooted like a tree to the spot, unable to take her gaze away from their hot desire, completely absorbed in their taboo sex. Gramps lay on the bed, June on top in a sixty-nine position, his face buried between her thighs, feasting madly while she clutched his nine-inch cock, stroking it as her lips bobbed over the helmet, relishing every slurp of pre-cum that dribbled out.

“It’s been too long; I’ve missed having you. God, I so desperately need to be fucked right now.” June shifted.

As she turned to mount Gramps, she noticed Joyce stood in the doorway and grinned to herself before returning her attention to Gramps' erect cock. She lined up the girthy beast at her slit and sank down, taking the entire length in. She rode him like a jockey on the final leg of the Grand National, bucking madly as he squeezed and caressed her pendulous breasts. Joyce felt a drip run down her inner thigh; she was soaked. The sensation awakened her to the truth of her own arousal. After June climaxed in a cacophony of moans, they swapped positions, with her face buried in the pillow. Gramps plunged into her with long, deep strokes, causing her to sob. His strokes became quicker and faster, smashing into her with the familiar slapping sound she had heard every Saturday evening.

"Yes, fuck me hard, give it to me, Daddy, such a big fucking cock filling my cunt." June came hard again, then fell like a discarded rag doll on the bed.

Joyce's hand was in her panties, fingering her clit, and she was on the verge of climaxing. Gramps spun June over, fucking her missionary style with long, deep thrusts; his pants and grunts grew shorter and louder, and his arse cheeks clenched trying to control his orgasm. June came twice as he continued fucking her relentlessly; she clawed at his ass with each thrust, pulling him in as deep as he'd go. Gramps instantly removed his big, long cock from his body. It swelled and twitched, bouncing up and down as massive jets of spunk erupted from the tip, landing on June's face. A second massive volume of spunk splattered on her tits; he appeared to continue on forever, thick ropes spilling down all over her body. Finally, he crashed on top of her; they met in a deep, passionate kiss, sucking up the spunk from her face with writhing tongues. Joyce began convulsing at the sight and slumped to the floor as she came, leading Gramps and Mum to look over her.

As she regained her composure, June created a position for her on the bed between them and patted it. "Come here, sweetie. I promised to tell you about my relationship with your father, and now seems like the ideal time. She smiled warmly as Joyce lay between them, the musky odour of sex thick in the air.

She continued, “Your father and I have a complicated sex life; he’s not the greatest lover in the world, and I have a vicious appetite for sex and big cocks.”

“So those men I’ve seen…” June cut her short.

“Over the years he grew less interested in sex until one day he discovered that I’d been secretly fucking Gramps. I was fucking him cowgirl, facing the bedroom door when he walked in and saw that gorgeous cock hammering in me; the sight of him standing there rock hard made me cum instantly.”

“What did he do?” Joyce was intrigued.

“He pulled me off Gramps, pulled out his hard cock and threw me to the bed and took me from behind. He came so fast. Then Gramps took over while he watched. And that’s how it all started.”

“Then what? What did he say, knowing you had fucked Gramps?”

“When he gets home from the pub, I tell him about my adventures because it makes him crazy, especially if I tell him how big the guys' cocks are. Well, it turned out that it was the trigger we both needed. He enjoys the humiliation of other men fucking me, and I enjoy getting fucked and telling him how good those fucks were.”

“Wow, that’s crazy’” June could see the quizzical look on her face as she tried to process the information.

“I love you more than anything in this world; your father does too, but we have carnal desires, slightly unconventional, I agree, so please don’t hate us.” June leaned over and kissed Joyce on the cheek.

“I love you too, Mum; it’s just a lot to take in.” Joyce looked at their glistening bodies covered in spunk and Gramps’s thick, flaccid cock draped on his belly; her pussy gushed.

“It’s why your mother is happy and carefree. She can be and do what she wants; not many people in relationships are so lucky.” Gramps added.

“Let’s go downstairs and make some hot chocolate; why don’t you put the milk on the hob while we freshen up?” It was always a warming treat for Joyce, one that made everything seem okay.

She finally started to comprehend her mother and her laid-back demeanour about the house as she stood at the hob warming the milk. She was introduced to a new, hidden realm of taboo sex through the orgasm her mother had given her. The idea of being nude in front of Gramps thrilled her; in fact, she had been in a constant state of arousal ever since her first orgasm. Hurriedly, she undressed and stacked her clothing on a chair, her cheeks flushed a deep shade of scarlet as she pondered their reaction.

As the summer air from the open window stroked her tits, making her nipples rigid, she became intensely aware of her nudity, exciting her still further. Gramps and her mother were happy to have her join them when they returned to the kitchen naked. In order to give Gramps a clear view of her nubile body, she turned to face him. As she had done before, she twirled gently, only this time completely nude. At the sight of her tender, young, petite figure, his thick shaft immediately expanded; Joyce saw it jerk upright, proud that she had elicited such a response.

“My goodness, you look just like your mother when she was your age.” Gramps sat open-legged on a chair, his throbbing cock on full display.

“That really is quite big, Gramps. It’s only the second one I’ve seen in the flesh, so I don’t have much to compare it with.” Joyce felt her pussy warm as she stared at it.

"With the exception of Mr Homer from the post office, who is by far the largest I've ever seen at twelve inches—he's larger than most." Joyce mouthed the words 'twelve inches' in shock, gulping. "Whose cock have you seen?"

“Max. Abby made him strip for her experiment. He got hard in less than a minute touching her tits.” Joyce explained.

“Really! Tell me about Max’s cock. Was it big?” June's mind boggled with the potential possibilities of seducing him.

“Not as big as Gramps, but it was very nice.” Her eyes were still fixed on his erection.

Gramps gripped his shaft tightly, pulling back the foreskin. “Nine inches.” He said proudly.

“I prefer big cocks; I like deep penetration and being stretched wide, but it’s not all about size; guys with smaller cocks can be just as fun.”

“Would you like to touch it, slide your hand up and down, and make Gramps a happy puppy?” Joyce didn’t hesitate and sat across his lap facing him.

She sighed deeply as both hands closed around his shaft, the thickness preventing her fingers from meeting the thumb. "Gramps, it's so warm and hard.”

“Slide the skin back and forth over the head; I like that.” With steady strokes she wanked his cock.

“When did you first sleep with Mum?” She asked, not looking up from his throbbing cock.

“Grandma invited your mother into our bedroom that morning to teach her about sex on her eighteenth birthday. She learnt a lot that day.” He grinned.

“And she managed to take all this inside her.” Joyce waved the meaty shaft proudly like it was a flag at a parade. “I bet it was tight. Did it hurt, Mum?”

“No darling, Gramps was very gentle, and I was very aroused.”

As Gramps ran his fingers down her exposed slit, Joyce trembled. “Your mother took three fingers that day without any problems; let's see.” She let out a loud cry as he curled two fingers up and into her dripping hole, unaware that they were being watched from the window. "My goodness, she's completely soaked. She's tight, but I believe she can handle another one.”

“Aahhh.” She squealed with a mix of pain and pleasure as three fingers entered her and slowly frigged her, matching her strokes of his cock.

As she pumped his shaft faster, Gramps finger-fucked her with the same speed. “I am going to cum soon.” She announced bucking on the three fingers stuffed deep inside her.

“I want it, Gramps. Can I sit on your cock and feel it inside me?” She gazed longingly into his eyes.

“I do have some morning-after pills, but we need to exercise caution because we don't have any condoms in the home and you're not taking the pill. We don’t want you to become pregnant. Gramps, just don't cum inside her. This afternoon Doctor Cotton will visit to write you a prescription for some contraceptive pills.

Joyce got to her feet, a little unsteady from the excitement of her first cock. Gramps steadied the base while rubbing the head over her clit, then up and down her slit. She dropped her body gradually, allowing the tip to enter, and then pushed down even more, focusing on her goal of taking his entire length. She experienced a brief moment of agony as the head slipped in and stretched her, followed by a rush of excitement as the crown pushed past her G-spot. She made an odd gurgling sound as her head fell back. He was balls deep; Joyce was completely seated on his length. Abby cupped her mouth, afraid she might shriek out as she fingered her clit, watching through the open window.

“Fucking hell, that is huge; it feels amazing. Oh my God, Mum, I see why you couldn’t wait to have Gramps fuck you this morning.”

“Stand up and turn around; let me get a good look as it goes in.” June grabbed the Polaroid camera off the shelf and took a snap. Joyce was about halfway down the pole, her cunt lips at their limit, with a look of bliss on her face. “Mmmm, one for the family album.”

As he lightly fingered her clit, she bucked back and forth. Her entire body soon tensed, and she began to groan loudly as her impending climax drew near. A jet of liquid spurted from her as Gramps abruptly shoved her off his pole; the quick exit left an empty space, but she was already cumming, trembling on her knees, unable to stand. All she wanted was for him to remain inside of her. Gramps was gasping for air and was about to fire his load; the smallest movement or touch would tip him over the edge. Abby was mesmerised and on the verge of her own orgasm.

"Suck it." Joyce obeyed as his cock went into her mouth, still in a fog and in the middle of her orgasm. Too much to swallow, Gramps let out a cry and threw a massive amount of spunk into her mouth, causing it to run over her tits and down her chin.

June took another picture of Joyce with jizz all over the place and a massive cock in her mouth. After removing the picture from the camera she got down on her knees and joined Joyce in sucking gramps as he cleaned his freshly deposited sperm from her daughter's face and tits.

She froze as she heard muffled sounds and looked up. "Oh my god." Wide-eyed Abby had been watching, clearly orgasming as silently as possible, and secretly wishing to be caught. She wasn't sure how long she had been looking, but she had seen more than she should have.

Having been discovered, she ran off. Joyce, naked with cum dripping down her tits, raced out after her without thinking and yelled at her to stop. It was a pathetic attempt at escape, but Joyce was a quicker runner and soon caught her arm. She had seen the entire incident play out, and although she was aware that it was taboo and incestuous, she wanted to share Joyce's joy and become part of their dark family secret. Dragging Abby back inside, Gramps and June were seated at the table. They reasoned that it wasn't worth the trouble to get dressed because Abby had already seen them naked. When they walked into the kitchen, June stood putting her hands on her hips and looked at Abby, who was staring at her feet, too embarrassed to look at June's naked body.

“What were you doing at the window, madame?” June always called Joyce ‘madame' when she was angry with her.

“Joyce said to come over at ten.” She mumbled.

“Shit, I forgot, Mum, what with everything that happened. It’s my fault.” Joyce admitted.

“And exactly what did you see?” June pressed.

After a lengthy silence, she gulped, "Everything, I am sorry." She remarked, looking up at June, but she wasn't at all apologetic. "I swear I won't let anyone know. Cross my heart and hope to die.” Her pussy was burning with a passion.

"I require leverage." June reached for the camera. "Madame, follow me, and you too, Dad.” After guiding them to the garden, June told Abby to undress. She did so without protest, constantly gazing at Gramps' semi-erect cock. She put her hands in front of her pussy and stood trembling. Curious about leverage, Joyce joined them to see what her mother was up to.

"Dad lay down on the lounger. Abby, let him view your cunt; I want you to stand next to him and rest one leg on the lounger. June came across as a demanding teacher. "Now look longingly at his cock.”

Her open moist pussy and big fleshy folds that jutted out from the narrow slit were perfectly visible to Gramps; Abby watched as his shaft became larger. "Play with your tits." Gramps lay there stroking himself. "Perfect, lick your lips, that’s it." June took the picture.

“We are done; you can go now. Not a word, or this picture will be sent to your parents, understand?” Abby nodded, feeling disappointed she didn’t get to play with Gramps’s cock; it was her punishment.

Joyce grabbed her arm and pulled her back into the house as June mounted Gramps's hard cock. “Don’t forget Doctor Cotton is coming at four PM.” June called out after Joyce as she lowered herself onto his pole.

When inside Joyce’s bedroom and still naked, the girls sat on her bed as Joyce revealed everything. Abby was taken aback, incredibly aroused by the sound of Gramps and June fucking outside, which heightened her state; she was envious of Joyce, who announced that she had an idea; hearing Doctor Cotton’s name had inspired her. She dug through her costume box and found a white nurse's hat with a large red plus sign and a plastic red case. She slipped the stethoscope around Abby's neck and put on the hat.

“What do you think, Doctor Abs? Does Max need his temperature taken?” Joyce giggled.

“Yes, Nurse Joy. I think he does. Do you have a doctor’s coat in there?” Joyce disappeared briefly, returning to the room with one of her father's shirts. “Will this work?”

“Dad is at work, and Mum has gone shopping in London, so no one will disturb us.” Abby excitedly said. She knew her drama lessons would come in useful.

-X-

Max was lying on his bed reading one of his favourite Tintin annuals while the two of them stood in front of the bedroom door. Bravely clutching hands, they gazed at one another, inhaling deeply and assuming their roles. Joyce wearing her nurse's hat, her mother's kitchen apron, and nothing else, and Abby wearing the big white shirt with nothing underneath, a stethoscope around her neck, and a notebook and pen. Max was startled when the door to his...