It's a rainy day. The air is heavy and damp and the showers have persisted since breakfast. It isn't a day for sunbathing or swimming.

So we take a cab from our El Mirador resort hotel in Tenerife to the main town and find the shopping centre.

I convince Jack I could do with a new dress, although clothes shopping is not exactly his favorite way to spend the day.

'Oh go on, please. I'll try and make it worth your while.' I plead, pouting my lips.

We enter a boutique fashion shop on the ground floor. Rails of expensive-looking dresses are temptingly displayed.

The assistant, a girl in her thirties, fits the role. Skinny as a rake, tanned, blond hair tied in a ponytail, long-limbed, and with a small face. Hired to make the clothes she sold look wonderful. But utterly bored and indifferent to her job, she prefers to be on her phone rather than serving customers.

Apart from one other couple, we are the only customers. I can hear the other couple talk together, their American voices carrying loud and clear from the back of the shop.

I choose a pretty cotton dress and make for the changing rooms.

I grab Jack by the hand and drag him with me. 'Come on, my Jack. Come and see what you think.'

The row of changing rooms leads off the main store. They are clean, well-lit, and all the walls are lined with convenient full length mirrors. We choose a cubicle, push the door open and leave it ajar so Jack can watch me change.

From a couple of cubicles away, I am aware of the sounds of American voices.

I peer out.

In the doorway down the corridor stands a large elderly man in loose-fitting white combat-style shorts, expensive slip-on leather shoes, and a Hawaiian short-sleeved shirt. He's tanned and slightly overweight but with a strong-looking body, thinning grey hair swept back over his head and a rugged face. He has the look of a wealthy businessman but could have been a former soldier, a sailor, or even a construction worker and clearly he takes care of his body and has the means to do so.

He's undone himself, pulled the zipper down and untied the cord of his shorts and is holding his prick towards the interior of the changing room in front of him. With his other hand, he braces himself against the doorway. I notice on his wrist a pricey-looking gold watch and on his little finger a huge gemstone ring.

His large cock, surrounded by a thick mass of dark pubic hair, is sticky with his cum juices and he runs his hand up and down the stiff, brown shaft, whispering audibly.

'Come on, Tammy, lift that skirt higher, slip your fingers into your little pink slit. Make it like last time. Make me cum watching you.'

Jack and I peer discretely as the man moves his hand energetically, his face reddening, his voice a wheeze.

'Open your legs for me, honey. Let me see you stroke your pretty little pussy till your juices flow.'

From inside the cubicle, we hear a woman's voice.

'You naughty old boy, Gerald. Look at you wanking your big cock at me. Making yourself so excited. You might get caught. Maybe even by that pretty little serving girl, eh? You'd like that, wouldn't you? Bad boy.'

The man is panting loudly now, beads of perspiration on his brow, his knees bent, the cock in his hand glistening until he climaxes with a sigh, a spurt of semen splashing onto the cubicle doorway and dribbling onto the floor at his feet.

We pull back into the changing room as the girl, slightly breathless, comes out and kisses the man on his cheek. She puts her fingers to his mouth, and his tongue hungrily licks them clean.

'Well done. Now let's try the second outfit and see if I can get you hard again.'

She is half his age and almost half his size, tiny, slim, bronzed and lean with short-cropped golden hair and a wide smiling mouth showing perfect white teeth. I sense Jack's eyes light up. She carries a lightly flirtatious and sexy air about her.

As she walks past us in her underwear she sees me and smiles with a mischievous pout.

'Oh, you might like this dress. It's your colouring and your size. I've got small tits too.'

She hands me the dress she was wearing. I am rather taken aback and just manage to whisper, 'Thank you.'

'Go on then.' Jack winks at me, watching the girl walk on into the store. 'You'd better try it on.'

I'm a bit miffed. I don't consider my breasts small. Average, I'd say.

I step back into the changing room and slip the girl's dress on over my body. It is still warm from her, the expensive perfume lingering in the fabric as I pull it over me.

I look over to Jack. 'I can smell her. It's like she's inside me.'

'Kinky,' is all Jack can murmur.

I adjust the dress over my body. 'Are they still there?' I whisper to Jack.

'Yep, she's gone back into the cubicle with another dress and he's got his back to me but I bet he still has his cock out. Waiting for the next outfit, I guess.'

I smile up at Jack. 'Is it making you hard watching? Are you trying to imagine that girl naked in front of him?'

I move towards Jack and press my hand to his groin. His cock twitches, showing the beginning of an erection.

'Let's go and see what they're up to, eh?' I murmur.

I step out, still wearing the thin summer dress the girl handed me.

The man sees us and urgently pushes his cock back into his shorts.

'Oh please, don't feel you have to stop. We're quite relaxed about this kind of thing.' I smile at him.

Jack and I stroll along towards him until we get alongside. I peer into the cubicle and the girl is now taking her bra and panties off and slipping into a very similar dress to the one she handed me. Knee-length, short-sleeved, soft-printed cotton, buttons down the front.

She is unsurprised to see us and puts her hand out to touch the dress I am wearing. 'That looks really good on you. Perfect fit and great colour. I was just saying to my dear Gerald, does he prefer the top buttons undone or the last ones by my knees?'

I reply. 'I suppose he's either a tit or leg man. Jack's a leg man, I'd say. What about you, Gerald? If we're going to share a cubicle, we ought at least to introduce ourselves. I'm Charlotte, this is my husband, Jack, and we're from England.' Rather formally and a bit awkwardly, I shake hands with them both, aware that Gerald's right hand was only a moment ago stroking his stiff prick.

The girl takes us both by the arm and gives me and Jack a kiss on our cheeks by way of greeting, her perfume smelling expensively sweet as she brushes her lips against mine. 'I'm Tammy, and my man is the lovely Gerald. And we're from Las Vegas, where the sun always shines and where the shopping malls can be a great place to meet new folk.'

"So what do we do about the buttons, Charlotte?" She asks. "How about we give the boys the decision? You do the bottom three for Jack and I'll do the top three for Gerald. You men can decide what's more appealing, or should we be saying arousing?"

With that, she pulls me into the cubicle to stand alongside her, her slender body looking up at me and pouting towards Gerald and Jack, and starts to undo her chosen buttons.

'Come on, Charlotte, keep up.' Tammy takes my hand and places it on my dress, three buttons from the hem. Looking down, I start to unfasten them.

'What do you say, boys? Looking good so far?' She taunts.

Tammy undoes the third button from the top of her dress, pulling it deliberately and tantalisingly tight over her firm, naked tits. I unfasten my three buttons, revealing my long, bare legs up to my thighs. Being in the tight confines of a changing cubicle in a public place and slowly undressing in front of strangers feels erotic and naughty. Just the kind of exhibitionist behaviour Jack and I often search for in our travels.

From behind me, Tammy leans into me, on tiptoes, with a hand up on my shoulder and whispers, 'How about we give the boys something to get excited about? How about it, English girl? How about a US and English joint effort? Let's both get them hot.'

She fixes Jack and Gerald with a delicious gaze. 'Right boys, get yourselves ready; now the show starts.'

Tammy reaches down to undo another button on my dress, at the same time placing my hand on her dress, close to her tits.

'Come on, Charlotte, give me a hand here with the next button.'

I undo a button and pull the top of her dress wide, revealing pert, brown breasts, perfect nipples, erect and firm.

In front of us, Gerald stretches his prick out further, his broad hand rubbing the length of it to an impressive erection.

I look over to Jack. 'Don't get left out, Jack. Get yourself started.'

'Yes!' Tammy calls out. 'Let's see you enjoy yourself, Jack. Get that lovely British cock out for us girls.'

He undoes his trouser front and his slim, long, brown cock springs free into his hand. The men stand side by side, their cocks growing as they watch us, their hands rubbing their erections.

Tammy stretches up to me until her mouth rests on my earlobe and whispers. 'Let's give them everything they'd want to masturbate over. I'm going to lick you, Charlotte. I'm going to finger your open pussy and let the boys watch us together.'

Her breathless whisper is a turn-on and I can feel myself getting wet as Tammy undoes another button of my dress and pulls it to one side so my dampening thin cotton panties are on show.

'Pretty little British pussy you have in there. I bet it's all sticky and glistening ready for me.' She smiles as she pushes her hand under the top of my panties and bending down, pulls them down over my knees and onto the floor at my feet.

She runs her tongue over my lips and places her arm around my waist, a hand inches from my naked groin, fixing Jack and Gerald with a wicked grin.

'How's this looking, boys? Shall I open her pretty pussy slit for you and try and get her really wet?'

In front of us, Jack and Gerald are wanking their fully erect cocks, their cum juices glistening the tips and oozing down the shaft into their fingers.

Tammy undoes the rest of her dress, slips it over her slender shoulders and lets it fall to the floor. She is naked underneath, revealing her trim, compact little body with an all-over tan, flat tummy, pert tits and erect nipples.

'Now then, Charlotte, we need to get you going,' purrs Tammy as her hands peel my dress away from my body and let it drop alongside hers.

We stand side by side, naked in the harsh changing room light, our bodies reflected in the mirrors around us.

She runs her hand down the flat of my stomach, towards my trimmed pubic hairs, her fingers tickling my bare skin.

'Let's see how wet we can make this pretty little English cunt of yours, Charlotte. Let's turn these big boys on and see who can last longest.'

Jack is becoming overexcited, saliva dripping from his open mouth. 'Oh, Tammy,' he wheezes. 'You are a proper little minx, aren't you?. Our favorite fantasy, with strangers in public. Enjoy it with me.'

Both men are in their own personal space, enjoying the show in front of them. Their trousers have dropped to their feet and they wank slowly, controlling themselves and both wanting this experience to last forever and not to ejaculate too soon.

Gently easing my thighs apart, Tammy slides her forefinger through my pubic hair and slips it into the crack of my oozing pussy. I widen my legs to help her in, my feet apart, my slit open to her fingers.

'Ooh, quite wet already, Charlotte.' She breathes into my ear, moving her middle finger along and pushing it inwards, wet and sticky with my pussy juices.

'My turn, I think, Charlotte. Give me a hand here.' She takes my hand and places it down to her open cunt. She's neat and small down there with carefully trimmed pubic hair. I part her pussy lips and run two fingers into her wetness as she groans gently. 'You Brits know how to make a girl feel good.' She smiles up at me as I push my fingers deeper into her sticky slit.

We rub each other, gently at first, the passion growing. Our nude bodies against one another, our wet pussies pushing together, fingers playing and fondling and our juices flowing.

In front of us the cocks are straining in the men's hands.

'Fuck. I love watching you being fingered, Charlotte,' Jack cries out as he wanks his cock in my direction.

Breathlessly, I smile at him. 'Yes, watch me, Jack. Wank yourself hard. Our fantasy with strangers. Watch me finger this pretty little American tart while she makes me cum.'

Facing each other, Tammy grabs my shoulders and pushes her mouth onto my nipples. Her tongue exploring, her saliva dripping over my tits.

She purrs. 'You Brits are something else. So deliciously naughty. Look how you're both enjoying playing with yourself and with my wet pussy while watching Gerald and his massive cock. I'm going to make you both cum like you'll always remember.'

Not able to control themselves any longer, Gerald cums first and with a deep grunt allows his semen to spurt over the doorway and down his thigh.

Jack follows almost immediately. With a shudder, he milks his hard cock into his hand and lets the cum drip through his fingers.

Tammy takes my head and pushes it towards her face, whispering. 'Our turn now, my naughty little English girl.'

She slips her tongue past my lips and into my mouth and our saliva mingles as we kiss, dripping messily down the corner of our mouths. Together we masturbate each other faster, our fingers slipping deeper into each other's wet slits. Our legs are widely apart, our cunts open and oozing with the rhythm of our fingers.

We turn to face one another and Tammy wraps her legs around mine, pushing her pussy into my crotch, our cunts rubbing against each other, our juices mingling together. The slithering, scissoring motion is filthy, erotic and abandoned as we allow our fingers to play with each other, finding space in the gap between our two dripping cunts as they rub together.

The fondling is a double frenzy of wet cum juices with our fingers moving quickly in and out of one another. We both orgasm with a sigh, our fingers slowing and then slipping out of our cunts covered in juicy stickiness.

'Bars and shopping malls,' breathes Tammy into my neck. 'Some of the best places to meet people.'

On the way out, drained and cum-soaked, Jack and I hand the dress I had been wearing back to the counter girl.

She smiles. 'Oh, that's been paid for, Madam. By the gentleman who just left, the American couple. He put a note in a bag for you.'

She folds the crumpled dress into a waiting bag as I take out the handwritten note.

It reads. 'Thank you both for making our afternoon so deliciously naughty. If ever you're in Las Vegas, look us up, and we can go shopping together.'

Jack leans over my shoulder to read the note and smiles.

'Goes to show clothes shopping need not be dull and boring if you know where to go.'

I take him by the hand. 'If they are all like Tammy and Gerald, then I think a shopping holiday to Las Vegas is next.'