"Happy National Nude Day!" my wife Mallory exclaimed as she carried a tray of drinks out towards our hot tub, where I was already floating naked. Mallory was also unclothed, commemorating our favourite unofficial holiday. Her lush curves were exposed in all their glory.
"Why so many glasses?"
"My sisters are on their way over. I'm sure you won't mind."
"Are they really going to come this time? Remember what happened on Earth Day."
"Well, I recall we had a good time. It just worked out that their good time was at the twin's house, and ours was here."
"No wonder they call you the Good sisters."
Mallory kicked water in my face. She was tired of old jokes about her family name. All through high school, she suffered , especially because her older sister Bridget was a joyful bisexual slut, giving rise to everything from graffiti such as 'for a GOOD time call...' to the more clever ' Bridget...too Bad to be Good'. Mallory got particularly upset by the ones which posted the family's real phone number. Perhaps it was fielding more than her share of prank calls which had driven her into a sexual shell. Before we met, she was inexperienced. A dozen years later, I was still coaxing her out of her shell. We shared a passion for pornography which had created an opening for an ongoing flirtation with the possibility of an incestuous encounter with her sisters. It had begun with Mallory teasing me about my transparent fantasies, to help me overcome my Valentine's Day story writer's block. That episode ended with her promising me a real life enactment on Earth Day, our traditional start of outdoor fucking season.
In addition to Bridget, Mallory's sisters were a pair of twins, Krista and Claire, a few years younger than Mallory. They had been young enough to be spared the brunt of Bridget's reputation, and had followed, to a lesser degree, in their older sister's lustful footsteps.
"Did they ever tell you what happened that day?" I asked.
Mallory slid into the tub beside me and sipped a gin and lemonade.
"You must really be horny. Your cock isn't even waiting for me to start before it thickens."
Mallory gently stroked my growing organ.
"It must think the warm water is like warm pussy."
"It thinks everything should be warm pussy. Your cock has a mind of its own, and no conscience."
"I would never cheat on you."
"No, but your cock would if you let it. Fortunately for it, I've been forced by our bet to accept that sharing my sisters isn't cheating."
Mallory had agreed not only to let me fuck Bridget, but to eat my cum out of her sister's cunt, as payment for my spinning an Earth Day fantasy of sex with the four Good sisters.
"You know you don't have to really go through with it. And the dare didn't include the twins."
"But it would be unfair to leave them out." Mallory bobbed down to plant a single kiss on the tip of my cock which was peeping out of the surface of the tub.
"Do you think those three had as much fun as we did on Earth Day?" I asked.
"That depends, how much fun did you all have?" It was Bridget asking. She had entered quietly through the yard gate behind me. I also heard the soprano trilling of the twins, giggling as usual at their sister.
"Mal told us that she and you got each other off, just chatting and fondling. She didn't say about any other fun....nothing about fucking, for instance." It was Krista speaking. Of the twins, she seemed the bolder. In the fantasies, I focused on her while Mallory played mainly with Claire.
"Well, I don't imagine the three of you did much fucking. Or was there a guy there I don't know about?" I asked. "If Mal told you about my fantasies, inviting another guy to a party would be a pretty shabby excuse for skipping the opening of outdoor fucking here."
Mallory blushed.
"We would never do anything to help you live out those fantasies. Mal is a one man woman, you know." Bridget said with a sarcastic tone in her voice. The eldest Good sister had not changed her spots since high school. She seldom met a man β or a woman - that she wasn't ready to fuck.
The twins came around the hot tub into view. Krista must have stripped behind us, because her slim body was already naked, her long blonde hair tied into a complex knot, to try to keep it dry. I noticed she had no tan lines. Claire was still covered by a poncho. Music began playing out of the poolside speakers. Bridget must have selected a sensuous Arabic mix CD. Claire danced to the rhythm of the drumbeats, easing the poncho over her head, teasing me with flashes of skin. Finally, she threw it onto a deck chair. I noticed her naked breasts were truly identical with Krista's, except Claire's were coated with a glistening dew of perspiration, and her nipples stuck out like erasers. Krista, slipping onto the tub, her nubs shrunken in reaction to the warm water. They were however, a lovely light pink, reminiscent of bubble gum. Krista sat with the innocence of the schoolgirls who used to tease me into sharing my gum. My mouth watered at the prospect of chewing her buds.
Mallory laughed, "If only you could see how you're drooling, honey."
I turned to Bridget, who was stripping a sarong off as she latched the gate. "Be careful what tense you use, B."
"I'm never tense."
"No, I mean I think you meant to say 'Mal was a one man woman', not 'is'."