(Note to Reader: This accounting of events is based on real-life experiences. If the adventures here inspire you and your SO to expand your own intimate relationships, feel free to add your personal anecdotes to the comments section at the end of this story.)
*
It was an accident. I thought our door was the second one from the end. It wasn't. The door I opened was Bill and Charlene's door, and Charlene was buck naked, stepping out of her panties, her brown slit peeking out between the white cheeks of her ass, her large, heavy tits dangling like coconuts.
"Roger! I'm naked!"
"Sorry," I stammered, unable to move. "It was an accident."
"Whatever," she sighed, picking up her panties off the floor. She stood up, cradling her tits under one arm while attempting to cover them with the other. She was unsuccessful. "Just get out of here before your wife catches you."
I took one last look at Charlene's overflowing curves before making my retreat, the sight of her pendulous breasts and flowery pussy tattooed to my brain for life. Back out in the hall, I caught my breath, and realized my knees were shaking. What had I done? Charlene and I always had a sort of flirty banter going on, as did her husband Bill and my wife Sally, but nothing like this had ever happened. Had I just ruined it?
We still had two days to go on our summer respite, which was a long weekend at a cheap bed and breakfast in the mountains, but this bunkhouse style joint didn't exactly lend itself to privacy. There was only one bathroom on the second floor, the bedroom walls were paper-thin, and all the doors looked the same, with those old-fashioned thumb-latches that don't lock on the inside.
I found our door, peeked in to make sure I wasn't about to see somebody else naked, and sat down on the bed. Closing my eyes, all I could see was Charlene's naked body, her pendulous breasts, her hourglass waist, her wide hips and long legs. I grabbed my dick, which was stiff as a board.
Great
I thought to myself.
I'm supposed to meet the girls down at the pool, and now I've got a raging hard-on.
I knew seeing Charlene in a bikini would only make matters worse, so I whipped out my cock.
I grabbed a kleenex off the night stand, pulled my shirt up to my armpits, shoved my jeans and shorts down to my ankles, and started stroking, imagining Charlene's coconut tits dangling against my chest. It only took thirty seconds before the first glob of cum was shooting out of my aching cock.
That's when door swung open and Charlene barged in. "Oh Jesus!" she gasped, just as the second squirt was arcing through the air. "I was going to ask you for the Coppertone, but never mind." She turned on her heel and headed down the hall, slamming the door behind her.
I grunted out the last few drops of jizz, that sick feeling of dread seeping into my stomach. Would Charlene tell my wife right away, or hold it over my head, blackmailing me into re-landscaping her yard, or building her a carport? She always did have a way of getting what she wanted out of men, which seemed to be the norm for beautiful women with big tits.
I showed up at the pool a few minutes later. Char and my wife were side by side on their stomachs, sunning themselves, and Bill was doing slow, deliberate laps in the turquoise water.
"You brought the Lotion?" my wife asked, peeking up at me from her spot on the chaise lounge. Her demeanor suggested that Charlene hadn't yet spilled the beans. I breathed a sigh of relief, as I dripped some Coppertone onto my wife's slender back. "Hey Char," my wife asked, "there's no one else around, right?"
"I don't see anybody" Char replied.
"I was just thinking of undoing my top."
"Would you like that Roger, if we undid our tops?" Char gave me a knowing glance.
"Of course he would," my wife giggled. "He's a pervert."
"You don't say," Charlene smirked.
I unclipped my wife's top and finished doing her back, tormented by Charlene's tan body and the knowledge of what lay beneath her bikini.
"Can he do me now?" Charlene asked innocently.
"I guess so," my wife said. "As long as he doesn't touch anything he's not supposed to."
I moved over next to Charlene. She peeked up at me. "Go ahead pervert. Undo my top." I did, with my fingers trembling and my heart racing. After I got the clip loose, I slid the straps off her shoulders and watched in awe as the white sides of her breasts inched into view. The lotion came next. I was very careful not to let my perverted fingers slither too close to where they didn't belong.
"You missed a spot," Charlene said, looking back at me. Then she pulled her arms up, revealing even more of the sides of her smooshed out tits. I let my hands slide down to her white, forbidden softness, and she sighed quietly.
"Your husband has such soft hands," Charlene said coyly. "Is it okay if he does my butt?"
"That depends," my wife said, pondering the situation. "Can your husband do my butt?"
"You're cool with that, aren't you Roger?" Charlene grinned, lifting her shoulder and almost showing me her big brown nipple.
I nodded, relieved that I'd jerked off before trying to endure this tease-fest. I slid my hands down onto Charlene's hips, edging closer to her butt cheeks, when suddenly she reached behind her and jerked her bikini way up into the crack of her ass. "How's that, pervert?"
"Cool," I said, letting my hands slide down onto her soft cheeks. I couldn't help but peek between her legs at her brown, puffy mounds, which were leaking out of the crotch of her bikini. She opened her legs wider and flinched her hips to meet my touch. I let my thumbs slip down her ass cheeks, almost to her anus. She gasped quietly.
"All right," Bill said, his booming voice appearing out of nowhere. "What's going on here?" Bill is one of those big guys, the kind you would much rather have as a friend than an enemy.
"We're putting lotion on each other's butts," Charlene said cheerfully, "and you get to do Sally."
"I'd be glad to do Sally," Bill guffawed. "But right here, on the lawn? Isn't it illegal to fuck in public?"
"Nobody's laughing, Bill," Char snapped, in her annoying monotone. Bill ignored her, snatching the Coppertone bottle from me and kneeling next to my wife.
"Hey," Bill said, looking over at me, "how come my wife's ass is showing, but Sally's isn't?"
"Oh my God," Sally gasped, peeking over at Charlene's naked ass. "This is turning into an orgy." But that didn't stop her from pulling her bikini bottoms up just like Char's. I couldn't help but wonder if her twin mounds were showing the way Charlene's were, but what could I do? I mean, in all fairness, Bill should get to see my wife totally naked, just to make things even.
I watched out of the corner of my eye as Bill's big hands caressed every inch of my wife's round ass. She seemed to be enjoying it, letting out little gasps and undulating her hips in a barely perceptible way. When his thumbs disappeared between her legs - and stayed there - her ass shot up into the air, hovering until his thick fingers retreated.
