The family had set up camp at a lake in the backcountry. They had to hike in a few miles but this brought them to an idyllic lake with only a few other hardy campers nearby. Becky and her brother Tom were sharing one tent, and their parents had another, a reasonable distance apart to give each a minor sense of privacy, while still being in the same general campsite.
The family had always enjoyed outdoor activities together, and every summer had gone on at least one family camping trip. This continued even as the kids became teenagers and now were in and entering college.
Becky and Tom had generally been fairly close—with only a short awkward time as they both hit puberty. Now Becky was eighteen and Tom nineteen. Becky was short, just over five feet and a few inches, with full long wavy blonde hair. She had small firm breasts shaped like small shallow cups and firm muscular legs from being an avid tennis player. Tom was just a tad less than six feet tall and also in good physical shape, liking to do a lot of hiking and rock climbing. He had a ruddy complexion and sandy brown hair, also wavy.
Tom had now been at college for a year. Coming back, after being away and not around his sibling on a day-to-day basis, he had been noticing her in a new light, as the young woman she had become. He noticed she treated him as a confidant, someone she could easily talk to, like old time friends, which really they had been, even if they had not been in touch much during his year away.
On their second day at the site, Tom suggested to Becky that they go off on a hike. It was already a warm morning. He had a topographical map, and loved to explore, on and off trail. Becky was up for it, just hoping he didn't try to get her to do anything risky. She did enjoy her brother's company, and they really had not spent that much time together since he had gone off to college the previous year. He had asked his parents if they wanted to go along, but this was really for form only, as they both knew their parents seemed to prefer hanging out near the lake, fishing (well, dad doing the fishing) and reading. Their parents were both in plenty good condition to hike, and their dad sometimes did go backpacking, but in the last few years anyway, they tended to just stay at the base camp on these family outings.
Tom was really happy to get some private time with Becky. He was a little confused by is own feelings, he knew it was in part that she was a pretty girl to hang out with, but he told himself he just wanted to catch up with her.
Becky was wearing short jean cuts-offs, worn and threadbare in places, and a light t-shirt, braless, as it was cooler that way and she did not need the support given her small cup size. She had on hiking sandals. Becky was glad that Tom did not seem to have grown apart from her after being away, as she was afraid he might have. She liked having an older brother she could confide in. He always seemed self-assured.
Tom was in cotton running shorts and t-shirt. He packed a few snacks and a couple of sandwiches in a light backpack along with some water bottles.
Tom led the way, occasionally checking the map as they followed a sparse trail. Becky was not as fit for this kind of hiking as Tom, but did her best not to show it. They were both sweltering, their t-shirts showing the sweat running down their fronts and backs. But they kept hiking, stopping every once in a while to drink some water, or take a scoop of trail mix to replenish themselves. As they hiked they occasionally chit-chatted, but much of the time they were silent, wrapped up in nature and the work of following the narrow trail.
After several hours of hiking, mostly uphill, Tom called to Becky, "I think I hear some water over there—the map shows a stream—let's go check it out—we can cool off a bit there and replenish our water bottles and have some lunch."
Becky followed Tom as he headed off the trail through the shrubs and trees, hearing the water get louder. Walking towards the sound, they came to some thick bushes. Looking through them Becky noticed Tom come to a stop, then turn to her and motion to be quiet. Becky assumed he must have seen some deer or other animal by the stream. She crept closely up to peer over his shoulder, looking to where Tom pointed. The first thing she noticed was some heavenly falls dropping down into a small pool under it, looking deep and wide enough to wade in. But then noticing particularly where Tom was pointing, she saw a young couple, probably mid twenties, sitting in the shallow water on a rock making out. The guy was in board short swimming trunks, and the woman was in a bikini with full buxom breasts, sitting on his lap, their bottom halves submerged. The woman turned back to kiss her partner, as his hands cupped her breasts. The roar of the falls had probably masked the sound of Becky and Tom's approach.
Tom and Becky watched intently, feeling naughty spying like that, but also fascinated, unable to turn away. Becky pressed against Tom, one hand on his shoulder, a breast against his side, so they could both see without being obvious. In turn, Tom put his hand around Becky's waist as they both attempted to get a good view through the shrubbery. They could hear the girl moan, even over the roar. It was quite obvious the two lovers were enjoying themselves.
As they watched, Tom began to notice his sister's small breast against him, chiding himself that this was his sister, even if she was hot to look at. However, watching the couple had gotten him stirred up. Becky also became aware of how they were standing together, but also tried to ignore it. She, too, was getting a bit turned on, never having seen a couple get quite so frisky out in the open (though the couple probably did assume they were in private, as it was a way off a sparse trail after a several hour hike from a back country campsite, after all).
They watched as the guy's hand moved behind his gal's back and undid her top. As it fell open, they were rewarded with a flash of nipple and bare pendulous breasts before she covered herself with her hands.
"No! Not here," She scolded the guy. He tried to go back to kissing, but she had gotten annoyed.
"We really don't want to be seen now!" Becky whispered to Tom, as their attention was rapt in the little love scene.
"Let's just go now," they heard the woman say in a huff. They watched as she got up and went behind some trees that were visible to Tom and Becky. Luckily in her apparent preoccupation with her spat, she did not turn their way, as they too would have been easily seen. They watched her get out of her bikini. They could see her full firm breasts and a sandy colored trimmed bush, as she lightly toweled off her body.
At the same time, the obviously disappointed guy also changed out of his wet swimsuit standing by the water; his now deflated but impressive manhood dangling as he put back on his shorts and shoes.
Becky and Tom looked back and forth at the two of them dressing.
The woman was sliding on her shorts, her large beasts swaying as she bent over. Straightening up she slid her tee shirt over her head—but they both noticed that she stuck her bra and panties, along with her wet suit, in her backpack.
Tom whispered to Becky, "Maybe she's not really as pissed as she was acting!"
They waited a bit as the couple moved out of sight heading back the way of the trail talking heatedly to each other.
"Wow, that was hot!" Tom told his sister, still frozen where they were, there bodies still pressed together.
"That was so sexy, until that jerk screwed it up," Becky replied. "Too bad guys always want to go too fast."
Realizing they did not need to be hanging on to each other anymore, they separated awkwardly.
"Let's check out the falls," Becky suggested.
