All characters are/were over 18 at the times of portrayal.

*****

This heatwave feels unending; but of course it's only been a few days. It's too hot to do anything. Or wear clothes.

Of course the last part has never bothered us at home. We're naked now, lazing on the patio in the back garden. I rigged a large sheet out from the back of the house, like a canopy, to keep the sun off us. We're not overlooked in the garden, so we're wearing nothing.

My wife and I are on one of the two extra-wide reclining loungers. My daughter and her partner are lying on the other. We are listless, any movement brings sweat. The pool is refreshing but with the strong sun beating down on it, we can't go in it for long during the day.

I wonder if I should get an air-conditioning unit for the house, even just for one room; but Sod's Law means that the moment I do; a new ice age will begin outside . . .

There is someone moving though; however, she's not moving much. My eighteen year old granddaughter is laying on the bottom end of our lounger, casually sucking my cock. It's like she's nursing from it. Her eyes are closed and she's just gently using her mouth. She's been doing it for the last half hour; since her last swim.

My daughter reaches over and ruffles my granddaughter's short auburn hair. "Honey, leave your Papa alone. It's too hot."

"But Mom;" Tiffany whines, lifting her mouth off my cock, "I'm not really doing anything . . ."

"Leave her be, Olivia" I say gently. "She's not a bother."

My daughter smiles, "okay, Daddy" as her daughter goes back to sucking me off.

I cup my granddaughter's soft cheek with my palm. I love her so much. Though she's been raised as my granddaughter, Tiffany is my daughter too. Our lives have formed around incest.

My wife is my baby sister. Claire was an accident, but a welcome one; five years after I was born. She always doted on me and when I came back home after university, she had turned eighteen; she surrendered to her fantasies and gave herself to me. She had to beg me to take her; I was an experienced young man and she was a sweet innocent teen. I had to take her; I saw it would break her heart if I rejected her. Then in our physical intimacy, I fell for her too.

We kept our affair hidden from our parents in the few months I lived at home. When I embarked on my career after university and found my own place; they never suspected when I took her to live with me in the city.

Our parents died in a car accident a couple of months after Claire became pregnant with Olivia. We had been agonising how to reveal our lives, and their upcoming grandchild, to them and how to live more openly together. But once I closed their affairs; I realised that since we already lived together and shared the same name; we could pass ourselves off as a married couple easily. So we did.

When Olivia was old enough though, we told her everything; discarding some half-truths we'd long used with her to answer awkward family questions. Olivia had never been sexually inclined towards men; her teenage years had involved her bringing home a wide variety of young bisexual and lesbian girlfriends.

We, of course, accepted her adolescent choices; given our own perverted history. We hoped quietly that she would find a nice boy, eventually, who could give us grandchildren. Instead life took another path. Olivia never strayed from her lesbian inclinations all the way into adulthood, finding Amelie at university, who is her life-partner.

But both wanted children. Olivia asked me if I would conceive a child with Amelie. Claire agreed to the unusual arrangement. We tried for a few months but without success. We both got tested and it was found that Amelie couldn't have children. She, still fighting back tears, suggested I should impregnate Olivia instead.

I never really had a chance to choose; I remember Olivia jumping on to me like a little girl, saying "Let's have a baby, Daddy!" Claire agreed again, somewhat more eagerly since the idea of second-generation incest turned her on a lot.

Lo and behold, I bred my daughter. Actually three times; Tiffany is our youngest. Jack and Chloe are her elder siblings. They are going around Europe together currently, with friends. They formed a strong sibling bond and became lovers at a young age.

Tiffany though, always had eyes for me. She knows me as her grandfather, but she knows the truth too. Once she was old enough, we revealed her family history to her and she told us of her adolescent fantasies and made us promise to realise them. I took her virginity when she came of age. When she finishes university, I have to give her a child too. I'm looking forward to that.

You might be wondering about whether my wife/sister has been incestuous with her daughter or granddaughter. Well, yes; when Olivia was bringing her girlfriends home as a teenager, it made Claire question her own sexuality too, but she never acted on it until I started trying to impregnate Olivia.

Claire had spent a lot of time comforting our daughter-in-law after the news of her infertility; it led to Sapphic intimacy, and Olivia was soon joining them too for lesbian threesomes. They did have their own place but they moved in with us a little later.

It helped with raising Tiffany and her siblings too; since they effectively had one father whom they call 'Papa', and effectively three mothers. One child, then two and three, between four adults meant we were quite comfortable and well off, since we all worked and we moved house and found somewhere larger and suitably private for a family of seven.

You might be wondering about Amelie. Her family back in France are quite normal, but she loved the way our family was so inclusive and unrepressed. I glance over at her on the lounger. Her belly is showing now.

Amelie is a couple of years younger than Olivia. She was seduced by my daughter, who was in her final year at university, when Amelie was in her first. She was an innocent ingénue, fresh in our foreign land. She couldn't cope with the demands of university study and dropped out in that first year, but remained with my daughter as her lover. They both still look as gorgeous as they did then.

Age hasn't hurt their looks too much; it helps they are both sporty and we all make full use of the extensive home gym I put in the house we moved together to. She's thirty-eight, but could pass for ten years, or more, younger.

Her doctor recently heard of a new fertility treatment which could give her the ability to carry children. Olivia and her mother told her to go for it. Amelie had looked at me and said there was only one reason for her to have it done; if I would give her a child afterward. So she did, so we did; I focused on cumming in her every time for a week, once she'd healed from the surgery and it was her ovulation time. It worked that very first cycle.

Amelie is very much bitten with the incest bug. She has not only seduced and made love to her sister and a niece in recent years; but she is adamant she wants to make love to her own child, once he/she is old enough.

That's why I don't mind my granddaughter sucking my cock; we should never say no to sex. In fact, this reminiscing has given me some energy. I stand up and nod at Claire.

"Tiffany; your Papa wants to fuck." She says, matter-of-factly.

My granddaughter exclaims enthusiastically and throws her youthful lithe form off the lounger and onto the floor, where a blanket is laid out. She spreads and bends her legs, revealing her juicy hairless peach, shaved like all my women are. "Thank you Papa! I really need to be fucked; my cunny is just dripping wet!"

Claire pats her granddaughter's head lovingly; "you little slut" she says warmly.

"Such a slut!" Amelie agrees "I hope our new addition to the family will be a slut too" while she rubs her pregnant belly. Olivia's hand joins hers in appreciating their child, but soon slips down between her lover's thighs.

I am watching my daughter and her partner begin to animate, but remind myself that there's a girl on the floor waiting for me. I'm hard as a rock and I drop down on to my knees and slip with ease into my granddaughter's tight but slick pussy. She groans and moans "So full!"

"I never tire of seeing you hilt in a woman." Claire says and sitting up she reaches over to me and pulls my head to hers. We kiss as freshly as that day when she threw her naked teenage body on me and professed her love for me. That kiss was energetic but nervous and innocent. This one is confident and practised but just as full of love.

I'm kissing my sister while my cock is deep inside my daughter/granddaughter. I lose myself in Claire's kiss but am returned by Tiffany's youthful impatience beneath me, as she's doing her best to fuck herself on my cock.

I take over and thrust repeatedly in her. She now has to hold the nearest leg of each recliner to hold herself in place, already cumming; I can feel her pussy spasming around my cock. Though I've broken the kiss with Claire; she looks on, breathless and excited; her fingers making wet noises in her snatch.

Tiffany is crying out with each movement. Her pussy still has the natural tightness and sensitivity of youth. Thankfully she is well self-lubricated and my cock was already wet with her saliva, so I can keep ploughing her vigorously.

Meanwhile, her mothers are 69ing on the other recliner licking and fingering their pussies and arseholes. I know the latter because Amelie cries out in her ultra-sexy French accent for more fingers in her arse.

Claire pulls me in for another kiss again as she cums. Then Tiffany beneath me cums a second time.

Finally I feel like I'm ready to unload. I up the pace, throwing her petite body about like a ragdoll; she's gone mentally, her words and sounds incoherent but as she feels my cum jet inside her; my granddaughter screams out her big orgasm.

I hold in her as I let my orgasm wash over me and my balls empty. I look down and admire my work, the teenage girl is dishevelled and covered in sweat, panting exhaustedly. Her labia are red and puffed, swollen from the violence of our coupling.

I pull out and offer my cock to Claire. It's become something of a ritual for us. No matter who I fuck, she always tastes my cock afterward, getting the last of my cum and the flavour of whichever family member's pussy I've been embedded in.

"Right. I'm going for a dip. De-sweat." I say and walk out from under the canopy to the pool. The paving slabs are very hot.

"Me too!" I hear Tiffany exclaim behind me.

"Where do you think you're going, young lady?" A voice asks, also behind me. I can't tell if it's my wife or daughter, so I glance around.

It was Olivia. "Sorry, Mom" Tiffany says as she climbs onto her mother's lounger. Amelie is still on top of Olivia in 69.

Tiffany sits on her mother's face, Olivia is no doubt now slurping her father's cum out of her daughter's just-fucked pussy.

"Good girl." Claire says, getting up too. "Never waste good cum."

I realise my feet are burning on the hot slabs as I watch the continuing Sapphic incest. So I jump in the pool, the water immediately and shockingly refreshing; the image burned on my mind of Tiffany sitting on her mother's face, who is still being licked out by Amelie, and given where Tiffany's hands were; her fingers are probably now in both of Amelie's holes.

Claire enters the water more gracefully than I did, sliding next to me. We move together, holding onto the side of the pool. I look into my sister's green eyes, and we kiss again; losing ourselves in each other once more.

"Pool fuck?" she asks, breaking the kiss and slipping her hand around my still-hard cock, under the water.

"I love you, sis." I simply reply, as we become one; while the products of our incest continue their own incest nearby.