Lisa and her sister walked from the pool to their room. Suddenly Monica grabbed her arm.
"Isn't that Mom?" The blonde girl looked back and her mouth fell open with shock. Across the width of the pool their mother's body was sandwiched between two hard male bodies, pussy and ass filled, while a third man fed her his cock. Their father sat nearby, another blonde impaling herself on his dick. The twins stood speechless, watching the fucking six in stunned silence.
They saw Celeste shake, then arch back; releasing the cock she was sucking in order to express a sharp cry, then swallowing it again. The other woman was rubbing herself as their father's cock slid in and out of her wet pussy and her orgasm was only a step behind their mother's. The trio of men redoubled their efforts, fucking Celeste with savage abandon until the one in her ass stopped, tensing, and squirting into her bowels. The man in her pussy cried out beneath her as he too came. Celeste caressed the balls of the man she was sucking; from where the twins stood they were sure she was sliding a finger back between his legs, perhaps as far as his anus. With a muted cry the man shot his load into her mouth. Celeste swallowed quickly, not letting a drop escape. As softening cocks slid from her holes she motioned for the other woman to approach, and then pushed her down between her legs. The other blonde ravenously lapped at the cream oozing from Celeste's pussy and ass while her husband, their father, fed his cock to the voluptuous blonde. Sucking furiously as she worked her fingers into his ass Celeste was rewarded with another mouthful of cum.
Lisa watched aghast, the heat between her legs warring with the flipping of her stomach. She knew what took place at the Resort. She had experienced something of it cavorting with Josie, Isabella, Anna, Sophia and John. It was another thing though to watch her own parents engage in sex with other couples. Like most teens she was quite happy to pretend her parents never had sex at all and seeing the disconfirmation before her own eyes was...
"I think I'm going to faint." Monica's voice came from beside her. Lisa nodded wordlessly.
"Hey hey now, that's no way to react." The woman's voice behind them was warm, teasing. "I know it's a shock, but people do come here to get fucked."
Startled Lisa turned away from the pool, Monica echoing her motion. The woman who spoke lay back on one of the sun loungers that circled the pool, a large umbrella shielding her from the sun. She was possessed of long jet black hair, smouldering dark eyes, and a fabulous body. Her breasts were large, her curves were full and like so many other women there she was waxed smooth. Her skin was as pale as Sophia's, although more startling against her darker tones, and she had indulged in black lipstick, eye shadow, and nail polish. "Hi, my name is Heather." Lisa frowned, the name seemed familiar. Something that John had said? A second woman slid into the seat beside Heather, holding two glasses, another woman with jet black hair, a woman as like Heather as Lisa was like her sister. Twins! The second woman handed a glass to Heather.
"You're Heather and Michelle?" Monica made the connection just a breath before her sister did. "John said there were other twins here," she attempted a flirtation, "He didn't say you were so cute." Lisa giggled. It seemed that Monica found the prospect of lesbian sex more enticing than being penetrated by multiple strange cocks. Being honest with herself, she felt the same way.
Heather smiled, "Why thank you." She inspected the blondes with the same frank admiration that they gave her. "How was the introduction with John and Sophia?"
Lisa sat on Heather's seat by her feet. Heather took the opportunity to rub Lisa's back with her foot. Monica took the same position with Michelle.
"We learned a lot about ourselves in a very short time... especially..." She looked at Monica and blushed. Heather smirked knowingly.
"It was the same for us." Michelle nodded in agreement. "John is a very sexy man, but he does have some freaky ideas, especially when it comes to seeing sisters together."
"He likes doing girls up the butt." Monica added. Michelle nodded again, this time speaking.
"You noticed. I'm sure he prefers the ass to the pussy. Mind you, I think Sophia prefers it that way too. At least when I've seen them fucking he's usually in her ass." Heather spread her legs so the others could see the green based plug nestled between her cheeks.
"Did you both?" Monica shook her head at the incomplete question.
"He did Josie, Isabella and Anna, but not us." Heather nodded.
"There's no shame in that. It took us three days to train ourselves enough to take him. He is a big man."
"You trained yourselves?" Lisa asked. Michelle answered her.
"We trained each other." She grinned impishly. "I guess you had the same idea, you weren't just carrying those dildoes for fun were you?" Lisa looked down at the Feeldoes in her hand and giggled again.
"I'd almost forgotten about those. Yes, I was planning to take Monica back to our room and fuck her ass till she can't stand." Even as she spoke the words she realised how much she had changed in a few short hours. She had gone from a few shared kisses to planning sodomising her twin. Wow! Monica's expression was priceless.
Monica shrugged. "I suppose turnabout is fair." The other girls looked at the blondes, then at each other then they laughed merrily.
Heather shook her head, "the joke was on us of course."
"Joke?" Monica looked puzzled.
"Not really a joke as such," Michelle chipped in. "We just didn't realise that there's nothing compulsory about getting ass fucked."
"Not compulsory?" A light dawned for Lisa. "You mean..."
"Everything that goes on here is voluntary," Michelle continued. "No one forces you to do anything, especially take a hunk of man meat like his up your ass. A few women here wear red plugs, and more wear amber. They like anal, but only with someone of more... umm... modest dimensions. I guess Heather and I are size queens."
Lisa laughed, "Well that's a relief I suppose." She hesitated. "I still want to try him though... but it's nice to know that I won't be kicked out if I can't manage him."
"Kicked out?" Heather laughed. "Someone as hot as you will have all the guys and girls coming round, and take it from us, being twins has an allure all its own."
The four said nothing for a few minutes, contemplating the connection that they shared with their sisters.
"Have you two tried the spa?" Heather's question broke through the silence.
"There's a spa?" Monica queried.
"Absolutely, come with us." Taking their glasses Heather and Michelle rose from their seats.
"Heather, hey, where're you going?" A man seated on the other side of Michelle caught their attention. Short cropped bleached blonde hair topped a tanned lean frame. Lisa wondered why she hadn't noticed him earlier.
"Sorry Stevie." The raven haired beauty blew him a kiss. "Girl time; I'll... sorry... we'll make it up to you later."
"No worries then," the man leaned back on his chair, stretching and flexing as he did so. A brunette woman in her late thirties waved from his other side.
"Enjoy yourselves, I'll make sure he doesn't get... umm... lonely." One brown eye closed in a conspiratorial wink. Heather laughed.
"Okay, thanks Amelia." She paused. "Hey, how are Cynthia and Connie?" The brunette smiled back.
