We rejoined them in the garden where they were dancing in the middle of the lawn, Garry had his hand on her bottom and mum giggled again.

"She's got yellow knickers on Terry."

"I know," I laughed. "I've already seen them."

"Would you like it if her and I got it together?"

"Christ mum," I said vehemently. "I'd bloody love it."

"Well stand by for an early birthday present." she laughed and cracked open yet another bottle of champagne as they broke apart and came over to get their glasses refilled.

"Where's the loo Sarah?" Shannon asked and mum took her hand. "Come on, I need it too." and like women the world over, they went together.

"Well Terry," Garry took a hefty draught of champagne. "I'm glad we came now, it's great to make new friends."

"Yes," I agreed. "The girls are getting on well too."

He laughed as I took my tee shirt off and dropped my jeans.

"I'm going to sample the pool" I said and dived in, the water was still quite warm and just as I surfaced another splash told me that he'd decided to join me. Together we swam half a dozen lengths and just as I was beginning to wonder where the girls had got to, they reappeared hand in hand, grinning and looking decidedly dishevelled. Mum changed the music to a very slow one and just as Garry and I went to pull ourselves out, Shannon shouted, "Stay there, we'll give you boys a little treat."

They slipped into each other's arms and began swaying sensuously right at the very edge of the pool, both girls knew full well that Garry and I could see right up their skirts as they touched lips briefly. Garry groaned as they moved slightly so that mum's beautiful little bottom was almost directly above our heads, her little yellow knickers stretched tightly across her bum cheeks.

"Bloody hell Garry," I laughed, "They've got each others panties on."

They moved again and it was the turn of Shannon to display her gorgeous little bottom, mum's tiny white knickers just visible in between her cheeks. They moved back onto the lawn as we pulled ourselves out, I raced into the kitchen for some towels and came back just in time to see Shannon's hand reaching under mum's cut off tee shirt.

Her nipple was already hard as her new friend took it into her mouth and sucked it lovingly for a few moments before they pulled apart and took each other's tee shirts off. Still swaying seductively they took their skirts off and then sank down onto the grass in the most erotically charged Sapphic embrace I'd ever seen.

Mum lay on her back, eyes closed and a smile on her face as Shannon kissed each breast in turn, wetting each nipple with her saliva before running her tongue down slowly into her navel, a low moan escaped from mum's mouth as Shannon very gently kissed the front of her panties.

"Taste us both Terry," she smiled.

"That's wonderful," mum said softly as Shannon drew the panties down over her legs and tossed them towards me. My penis felt like steel as mum parted her legs and drew her friend's head down between them, she gasped and moaned again as Shannon kissed the flesh of each inner thigh and stroked her hairless mound. Slowly she moved her mouth upwards and mum arched her back to meet her tongue as it delved into the wet, glistening flesh of her vagina.

"Ooh Sarah," Shannon whispered. "Your cunt tastes like nectar."

Mum gasped again as her lover moved her head from side to side making sure that her whole face was plastered with her juices.

"Turn round Shannon," she whispered. "Please darling I need to taste you, I need your pussy."

Garry and I were spell bound, I wiped the panties over my face as Shannon took off her own panties and tossed them to him before turning round and lowering her vagina down onto mum's upturned face.

Mum reached up and held her hips as she licked in between Shannon's legs, I could see the girl's juices trickling out over mum's chin until she pulled her down and all I could see was mum's mouth clamped onto Shannon's cunt.

Shannon screamed and mum squealed, they rolled over and over, a mass of legs and blonde hair intertwined, feasting, loving, eating and slurping noisily as they devoured each other until gradually they slowed down and then rolled apart and lay flat on their backs.

"Wow," mum giggled. "I think I died then."

I was looking directly up between Shannon's open thighs to where her cunt lips glistened and shone with a mixture of her own juices and mum's saliva, she sat up but kept her legs apart and she giggled too.

"Phew," she laughed. "My God Sarah, you're something else, I feel like I've just ran a marathon."

They got up and held hands again as they jumped into the pool, so Garry and I stepped out of our shorts and joined them, they roared with laughter as they saw our erections flying through the air and it seemed perfectly natural when Shannon wrapped her arms around my neck and pressed her naked body into mine as we kissed hungrily. I looked questioningly at mum who nodded and blew me a kiss as she wrapped herself around Garry.

I felt Shannon's hand gripping my penis.

"Is this for me Terry?"

"If you want it."

She put her arms back around my neck and snaked her tongue into my mouth.

"Fuck me then Terry."

She jumped up and wrapped her legs around my waist as I took hold of my penis and aimed it towards the sexy little hole just above it, she sank down on me with a sigh. Beside us mum had done the same thing, both girls leaned over towards each other and kissed wetly, Garry and I watched the saliva being swapped and the tongues duelling as our cocks were being squeezed below the water.

Finally they pulled apart and giggled.

"Race you out," mum shouted and hung on as Garry and I started wading awkwardly through the water to the ladder. The girls didn't know whether to laugh or squeal as, impaled on our cocks, they bounced up and down with each movement. Garry and mum reached the ladder first and climbed out giving me a perfect view from below of his cock inside mum's pussy.

While we were waiting for Garry to struggle up the ladder, Shannon began bouncing up and down on my own cock.

"Fucking hell Terry," she gasped. "You're fucking huge, you're filling me up."

Her lips were on my neck, biting and nibbling, I felt her nails in my back as I climbed the ladder and stepped onto the side of the pool. I suppose it was the show off in me, the macho bit, but I couldn't resist it, whilst she clung onto me, I actually ran round the pool still with Shannon impaled on my cock. She screamed as my cock bumped roughly up into her cunt and by the time we were half way round she was gritting her teeth and hanging on for grim death as the power of her orgasm threatened to overwhelm her.

As I collapsed beside mum and Garry I was spurting inside her and Shannon was cumming again, I was conscious of mum squealing beneath Garry, her feet were on the floor, her back arched upwards as she met his animalistic thrusts. Shannon and I pulled apart as I gasped to catch my breath but Shannon scrambled over to mum and straddled her face, a globule of sperm dribbled out into mum's mouth and then another on. She reached up and pulled the girl down so she could taste her cunt as she came. I poured myself another drink and lay on the grass as the three rolled apart gasping for breath, they all grinned at me and mum brushed a lock of hair back out of her eyes.

"All right darling?"

"Great mum," I said without thinking and the other two looked up in surprise.

"Mum?" Shannon said softly, mum nodded and I cursed my stupidity.

"Yes," she came and sat down beside me. "Terry's my son and I don't care if you don't like it, my life was nothing until I went to live with this man, he treats me better than anyone else ever has.”

She was defiant and looked ready for a fight, but Garry stood up and helped Shannon to her feet.

"I know it was an accident Sarah that Terry let it out, but this is no accident, meet my sister," and gestured towards Shannon.

We spent the rest of the evening telling each other our stories, mum got quite emotional when she described how dad used to beat her just for pleasure and how I'd do anything to avoid coming home from school when I was younger. Then she told what happened when I left and Jack took me and then both of us under his wing.

By the time she'd finished both Shannon and her brother had tears in their eyes, their story was less complex than ours but every bit as poignant. They were twins and like many twins, they'd always been close, they were both eighteen when they made love for the first time six years ago and they would take every opportunity to consummate their love. Then one night when their parents had gone to the theatre, their car had developed a fault and they'd returned early to find their offspring naked on the sofa too engrossed in what they were doing to each other until their dad grabbed them and threw them apart.

It must have been awful for them over the next few weeks, but finally their parents had agreed to help them find a flat together and once a year gave them the use of their villa for as long as they wished, Garry was a programme writer for an on line company so he could work anywhere and he'd chosen to work here in Gran Canaria.

The girls got dressed then, well they each put a tee shirt on anyway and we went into the house to attack the lager.

"Life's strange sometimes isn't it?" mused Garry as we opened the drinks in the kitchen.

"In what way mate?"

"Well we've known you two for what, about two hours? And already you know our secret, we've know people for almost six years who don't know as much as you two."

"It's safe with us Garry," I said and for some reason we shook hands.

"Oh my God, they're at it again."

As we walked back into the lounge, the girls looked up and blushed as they pulled apart. Shannon was sitting alongside mum on the sofa and the fingers of her left hand glistened with mum's juices, she giggled as I took hold of her hand and sucked her fingers until they were clean and then she shuddered.

"God I nearly came then," she laughed. "Ooh that was so sexy."

"Would you two excuse us for a minute?"

Shannon looked surprised but followed him into the kitchen and came back about two minutes later with a big smile on her face.

"Sarah you're a sexy girl, do you both want to see something really sexy?"

"Wayhay," mum laughed. "Is the pope a catholic?"

Shannon pulled her skirt on and ran next door. "I'll only be a minute."

She was less than that actually and had a D.V.D. in her hand.

"How broad minded are you Sarah?"

"Oh I'm not," mum said seriously. "I wear clothes down to my ankles, big bloomer style knickers and a steel corset."

We laughed but Shannon said. "Well this is me at work and I warn you the second part gets a little bit kinky."

Mum took her arm and suggested that if it was going to be kinky, they should perhaps get dressed for the occasion and Shannon agreed all too readily.

"What's all this about Garry?"

"There's a little bar just down the road run by an English couple, Steve and Marie."

"They have an adult night once a week." I interrupted and he grinned.

"Yup, you been in there?"

"Earlier on tonight," I said, "We were planning on going tomorrow night too."

"It'll be great if you do" he laughed. "But Shannon wasn't kidding it really does get a little bit kinky later on."

The girls returned then and were greeted by two wolf whistles, mum had on her new leather mini skirt but rolled up to show the top of her stockings, a little black bra and her new leather jacket. She looked sensational and Shannon wasn't far behind in mum's little white baby doll with the matching panties. The hold up stockings were her own idea, but she was sex on legs, the contrast between them was amazing and Garry and I looked at each other and slapped hands.

"Hey look Terry," mum took her head from where she'd been nibbling Shannon's ear lobe. "That's that bar where we went earlier on tonight."

"It's where I work once a week Sarah," Shannon said and pulled mum's head back to her neck. "Now where were we?"

As the camera focused on a pair of legs, stocking clad legs, mum kind of lost interest in Shannon's neck and said with a leer.

"I think I recognise those legs, they were the ones round my neck not long ago."

We all laughed and watched as the camera followed the legs upwards to where they disappeared under a black leather mini skirt, just like the one mum was wearing now, the clips of her suspenders were clearly visible just under the hem of the skirt, then it moved upwards again to wear a hint of her areole was visible peeking cheekily out of her bra.

I looked across and mum winked at me, her hand was resting on Shannon's thigh idly toying with the dark strip of her stocking top. On the screen Shannon stepped up onto a table and from there onto the bar, she was wearing a tiny white g-string under the skirt, the camera zoomed in close, so close we could see where the string dissected her pussy lips.

She began dancing, swaying sexily as the camera moved to another pair of legs, longer and slimmer than Shannon's also clad in flesh coloured stockings, as with Shannon. The camera zoomed beneath her short skirt and lingered on the sheer pink g-string through which her slit was plainly on view. A feminine hand appeared then, the fingers stroking the pink g-string and then it panned back to show the whole picture of Shannon's hand beneath the other girl's skirt as they kissed.

In reality Shannon was nibbling at mum's ear lobe, one foot on the sofa and her knee lolling against the arm to allow mum's hand to delve inside her panties. Her own hand had freed one of mum's breasts from the bra and she was casually rolling the nipple between her fingers and thumb.

"That's Steve's wife, Marie," Garry said and Shannon giggled. "She's a kinky little bitch, Sarah, keep watching."

We both did, we watched as the camera panned around the bar at floor level, two of the female participants were actually naked under their dresses, but were drunk or daring enough to dance over the camera, legs wide apart and one even stroked herself as she swayed provocatively.

"She's a Spanish girl, Juanita," Shannon said softly as she bit mum's ear. "The reason she's not wearing any panties is him over there."

Garry looked as if butter wouldn't melt in his mouth.

"Look what's a man to do? She just looked as if her panties were too tight, so I volunteered to take them off for her."

"Hmm," Shannon looked doubtfully at him and went back to nibbling mum's ear.

The next ten or fifteen minutes of the film concentrated on the guests and their various modes of dress (or undress.) Togas were popular for both sexes as were Wicked Weasel bikinis for the girls, a couple of the girls wore sheer baby dolls and practically non existent panties, they all had one thing in common though, they were very sexy people.

"This is the kinky part folks," Garry said as he stopped the film. "Sure you want to see it?"

Mum and Shannon were trying to tickle each others tonsils on the sofa, so he took that as a yes and carried on.

A woman was lying on the counter with another woman squatting above her face, both were completely naked and the woman on her back, as well as performing cunnilingus on the other woman was being royally fucked by a big black guy.

"Hey mum look," I yelled. "It's that guy we saw on the beach."

Mum removed her tongue from Shannon's throat and squealed with glee.

"Ooh fuck, look at his chopper," she and Shannon fell about laughing, but they watched as the woman took every single inch of his length.

"He's twelve and a half inches," Shannon giggled. "I measured him myself."

It was then that I noticed another thing that was happening, the woman on her back seemed to be swallowing, mum saw it too at the same time as I did.

"She's pissing!" she laughed. "Ooh the dirty bitch."

"Shall I turn it off?" Garry asked, but the look mum threw his way, gave him his answer and he let it run as his sister drew my mother back into her arms.

The screen showed Shannon and Maria being helped down from the bar, just a brief shot under their skirts showed that somewhere along the line, they'd lost their panties. Steve was filling beer glasses rapidly behind the bar, well half filling them anyway and the two girls were holding each glass between the other's legs and adding their own brand of beer to them.

"Bloody hell," I exclaimed and mum giggled. "And you get paid for that?" she asked Shannon.

"Yes, do you like it?"

"When do I start?" she laughed and the laugh turned into a moan of desire as Shannon slipped her hands down onto her bottom and deftly removed her pantie., "Right now sounds good," she said softly and got onto her knees, her head between mum's legs.

Mum moaned softly...