The gurgling water scatters diamonds into the sunlit air. Flat, lush grassy riverbanks suddenly rise upwards to my left and right and the steep valley sides are covered in gorse, bracken, heather and young trees. Over millennia, boulders from the blackened gritstone outcrops have toppled down into the water to be broken up by the seasonal gushing torrents. Several large flat stones jut out over the river and are heated invitingly by the midday sun, while the riverbed is a mosaic of multicoloured pebbles. Several slippery, moss-covered rocks are laid out like stepping-stones to trick the unwary or foolhardy. The map says ‘river’ but my mind says stream: at no point is it more than six feet wide and, where the water slows to a crawl in one of the many tiny natural dams, it cannot be deeper than two or three feet. This place is peaceful and beautiful. The only sounds, other than the constant chatter of the water, are from the creatures that live here: countless chirruping birds and buzzing insects.

We left the car sheltered in a leafy lay-by about 45 minutes ago and now trudge upstream to find a secluded spot. I carry a rucksack containing just a picnic and a blanket. She simply carries herself: elegantly, confidently, purposefully; long, blonde hair bouncing with every step and her firm, lean body sways like the occasional willow that clings to the valley sides. The short, white, flared dress and walking boots are sexily incongruous, and as she crosses the river at a narrow point, striding from rock to rock, I catch glimpses of her delicious tanned thighs.

‘Come on! Keep up! I’m starving. There’s a good looking rock just up there - it’ll make a nice table.’ And there it is, broad and flat, bathed in sunlight, lightly speckled with exploding droplets from the mini waterfall beside it. The water flows slow and deep here. A little pool, created by the ring of rocks we just walked across. Perfect. She sits and takes off her boots and socks and dangles her slender feet in the icy water.

‘God! It’s cold – feels good though.’

I sit beside her, the heat of the rock soaking into my backside, and soon my feet join hers in the stream. It’s painfully cold, but wonderfully invigorating. I decide to share a secret.

‘When I was about fourteen I came here – had to walk back then of course, about six miles before I even got to where we just left the car… summer’s day, just like this… I started with my feet and then suddenly got the urge to dip myself in… had the idea that the waters would keep me young… it felt great! I felt young - re-born even - an’ promised I’d come back every year and do the same. I imagined myself at eighty, looking like a twenty year old and all my friends thinking I’d sold my soul to the devil…or that I had a really old-looking portrait hidden in the attic.’

‘Did you come back? You look like you might have… once or twice at least…’ and she looks me up and down, nodding to confirm the compliment.

‘I did, when I was about 21… I’d just got a car. Stripped and submerged myself… really took my breath… bit scary really, heart beating like mad… I thought what if I had a heart attack or something, they wouldn’t find me for days.’

She looks around, then tilts her head slightly and keeps still for a second. I listen too, wondering if she’s heard someone approaching. Then she stands unexpectedly, unzips her dress, slides the straps from her shoulders and lets it fall onto the rock. My eyes are instantly drawn to her dark brown nipples that pucker then start to grow. What a gorgeous body. I never tire looking at it, consuming every tiny detail: her tight, smooth belly; firm, round buttocks; taut, slender thighs; slight, square shoulders; pert yet full breasts.

‘What are you waiting for? Into the fountain of youth!’ Again she looks around and when she’s sure we’re alone, quickly takes off her knickers and sits besides me again. Once more her feet are in the stream, but now she eases herself off the smooth rock till her feet touch the bottom. I can’t help but stare at her neatly trimmed pubic hair and the inviting gap between her thighs. She gasps and her breath comes in short cries. The water is only up to her thighs but I can tell she won’t be able to stand it in there for long. Suddenly she drops and vanishes below the surface… one, two, three, four, five… an explosion of water soaks me as she surfaces and a gasp of air echoes around me as she destroys the silence.

‘Oh… Je…sus… it’s co…..ld!’ and quickly she is out beside me on the rock, taking its heat, hugging her knees, teeth chattering.

‘I warned you!’ I hug her wet body to me and she shakes her hair, splashing me with the icy drops.

‘Wow, it was worth it – you were right, I feel so alive,’ and she brushes the water off her shoulders, tits and belly. The gleaming silver droplets momentarily suspended in the short hairs between her legs transfix me. She sees me staring. Her right arm covers her breasts, left hand slides between her legs to cover her vulva and she makes me a proposition. ‘If you…’ She bites her lip as she thinks, puts on a lisping, little-girl voice. ‘If you go right under, I’ll show you thish… you can shtare all you want!’ Her eyes glance down to where her hand is now massaging. ‘Might even let you… touch it!’ Her eyes dare me. ‘Well then?’

God, she turns me on. I begin to rise to her challenge and then I stand up…

I peel off my T-shirt and she giggles. I unfasten and pull down my trousers and she covers her eyes.

‘Why is it shwollen like dat?’ She prods the black material that houses it. I realise the sun is burning my naked skin. What a gorgeous day. My thumbs go under the elastic and my cock pops out of my pants. It’s horizontal and right in front of her eyes. She rolls them round and round. ‘Ooh! Dat is weally, weally big.’ She massages herself some more, slips out of character as she releases a very womanly sigh, then wipes some of her juice onto my exposed glans with her fingers. ‘The man’s lollipop needs a wash now, all dirty… if it was clean I might suck it for him,’ and she pouts, then feigns indifference.

I pull my pants down and step out of them, then sit beside her and dangle my feet in the stream again. Cold. Liquid ice. Christ, I’ll be so shrivelled when I’ve been in there, there’ll be nothing left to suck. I gingerly lower myself in. Colder than I remember. I turn to look at her.

‘Wash it for me,’ she whispers huskily, barely audibly. I duck down slightly till it’s under the surface and come back up, shaking. I can barely speak. She kneels up, leans forward and takes it between her teeth, her tongue flicking the end. ‘Itsh a very tashty lollipop, mishter.’ She spits it out. ‘All the way now, under you go… and I’ll show you mine.’

She’s playing with herself, making herself ready. That is spur enough. Coldness envelops me, and the water rages in my ears. Now I burst the surface and shower her. I look down. My balls have shrivelled and hug my body for warmth but my cock is unaffected.

‘Show me then! You promised!’

She sits and spreads her legs without moving her hand, feet together, knees dropping outwards. I’m fucking freezing, but I could stand here all day. Her hand now slides up her belly, leaving a glistening trail. Now she places her fingers on either side of her slit and pulls outwards, opening up herself for me, displaying herself to all of nature. That really turns me on. Her gaping, glistening cunt open for any passer-by to see. She is pink and moist, like raw meat and my head falls to that place. I lap at her, like a big cat taking milk from a saucer.

‘Are you coming out, before you freeze?’ The little girl is gone and the woman is here. I’d forgotten just where I was for a moment, but in a second I up am on the rock beside her, shivering, shaking, feeling so alive. ‘We can’t fuck lying down, it’s too fucking hard and I’ll scrape my backside and shoulder blades! Do me standing up.’

‘What if somebody comes?’

‘That’s the whole point, shtupid!’ – momentarily the girl, but she is gone just as quickly and the woman stands, turns around, bends over and offers herself to me. ‘Just fuck me, don’t worry about making me cum – you can sort me out later. Just fuck me and cum, like an animal. I’d like that – I’d fucking love that. Yeah, like we just met here – use me like you stumbled upon me. Like I’m just something to fuck!’

God she looks good. I love that view of her – her dripping wet slit and her tight arsehole just waiting to be played with. I can’t resist eating her from here, kneeling behind her, looking at the most inviting picnic ever. Each long lick fills my mouth with her clear mucus and ends with a tongue-poke into her arsehole. I do it till the juice is running down her legs. She’s groaning, almost lowing, like cattle.

‘I said fuck me! Now! Hard… I’ll cum too, do it…’

I stand and she grabs me through her legs, feeds it into her. I slide… oh, how it slides, till my skin slaps against her. I bend her over, grip her hips and pump, pushing her away as I draw back, pulling her towards me as I slam into her. She is tight anyway, but with her legs together like this I know I won’t last long. Groans and fleshy slaps echo through our idyllic, private valley.

A breeze rustles the leaves of a nearby copse and I suddenly look around. I’m nervous at first but now I hope someone is up in that thicket of silver birch, spying on us. I hope they have their dick out, or their fingers in their pussy, using us as their wanking material… maybe even videoing us to put on Redtube later… before sowing their seed in the long grass.

With that thought, the sweet feeling in my loins begins. I pump harder till it builds, holding back from cumming all the time. Now I’m there! One last powerful thrust and I feel the cum travelling up towards the open vent of my volcanic cock. Whipping it out at the last moment, I push my dick between her arse cheeks and fuck them so that my cum projects in a long arc across her back. The first rope hits her shoulder blade, some lands in her hair… the next few spurts have progressively less energy, splash on the small of her back. I squeeze my balls gently and the last drops dribble down my shaft. I use the lubrication to slide my cock across her arsehole, then smear my cum all over her with my hands, like soap. I reach round to massage and cover her tits with it… she loves that. She’s heaving and moaning like she’s about to cum too.

‘Push it in my arse, quick, while it’s hard enough… fuck my arse, make me cum… I’m nearly there…oh, oh…’

I do as I’m told, though I’m only just hard enough to penetrate her. Once the tip is inside I feel her reach down and touch herself and that, despite having just emptied my load onto her, gets me growing again. Up her delicious arse I go and she is coming too… shaking, bucking, crying out, pushing herself back into me as she rubs her clit. I pierce her backside to my full length and she’s pulling and twisting her nipples in turn, sobbing with every cycle of her blossoming orgasm. Now, she too is spent and doubles over, touches her toes, breathes deeply, noisily, still impaled on my stiff manhood. We stay like that till her sighs and my erection subside.

Suddenly she pulls away.

‘Quick! Into the water… right under.’ Again I follow orders. First we stand together, then she takes my hand and beckons me to crouch. It’s unbelievably, heart-stoppingly cold, but when I finally break the surface and clamber up onto the hot, flat rock once again, I feel more alive than ever before. Every single cell of my body feels renewed, regenerated, energised, full of power and life.

‘Next year… every year. We’ll do this every year and never grow old.’ She too is overflowing with life and enthusiasm. We hug and kiss. Wet and naked on our own rock, beside our waterfall we make our pact, repeating the words in unison. Then she kneels before me.

‘Piss on me.’ This is something we’ve never done, not even talked about.

‘I… I’m not sure…’ But she nods her reassurance:

‘Many cultures believe that fresh piss is cleansing, healing, life giving…’ she says, and it suddenly feels perfect, natural. I relax, release my bladder and feel it rise up and warm my now shrivelled appendage… it spurts onto her neck and tits, splashes down her belly, through her pubic hair, over her thighs and onto the ancient rock. What a feeling of freedom, of relief.

‘Oh, yes. Oh fucking yes!’ She closes her eyes and puts her face into the stream of hot yellow fluid. As the flow abates, she takes the last few drops into her mouth, sucks my soft cock and drinks from me. ‘Lie down!’ I carefully do as I’m told and she positions herself above me, legs spread. She squats. I see the first drops glisten and fall in the sunshine, then a strong, golden shaft of piss shoots from her, hits my body, splashes noisily onto my chest and face. I raise myself up on one elbow, rub it into my skin, feel it flow over my belly, cock and balls, between my legs. I have the uncontrollable urge to lick her nether lips and taste her – mmm, slightly bitter, salty. Can’t believe we’ve never done this before. ‘In again!’ she yells and steps into the water, this time collecting some in her cupped hands and rubbing it on her skin. I join her there, rinse myself off and kiss her lovely mouth. Our laughter drowns the giggling waterfall. I shiver.

‘Can’t f f fucking wait till n n next year!’

‘We don’t have to only do it then… we can come back every day if you want.’

‘No. Once a year. Please. Let’s keep it special.’ She nods a resigned smile at me and I continue. ‘July the thirteenth. Just as we promised… then we’ll stay young together, live forever.’