(Complete fantasy, and if not interested in descriptions of MMF sex, no need to read further)
There is a stretch in mid-August where the lake is empty in the mid morning, every year. Part of this is that the grass is generally wet and there is less unshadowed space. Another part simply being that people are on vacation, with most visitors to the nudist section being locals who know about the seasonal shifts and thus start coming later.
The parking lot is not a great indicator, but there were only a couple of cars, one which had just parked, with a couple getting out and unloading, including a six pack. Taking less time to leave and start walking, it had been enjoyable seeing them, especially her, wearing a black bikini top, a flowing cotton skirt that went well with her flowing long hair, and comfortable flat leather sandals. The top showed off her gorgeous breasts, with the nice curves of someone in their mid-20s or so.
Striding fairly quickly to my normal spot, it was amazing how empty the various areas were. Even the largest had only two people, both swimming. This is always a bit of a problem, because when things are so empty, a bit more caution is required. Such as not swimming far, or paying attention to your belongings. That being a bit of a problem, since hanging my coat under a tree as normal would mean not seeing it when in the water or sunning on the blanket.
The water temperature was glorious, the sun quite hot by this point in the morning. After taking a first quick swim, the opportunity to smoke the joint I had brought was impossible to resist. Or half, as there was no one to share it with, putting the unsmoked half in a small ziploc bag. Generally, when getting stoned like that, I like to be in the middle of the lake, but standing a few yards out in the invitingly warm and clear water was acceptable considering the sheer emptiness today.
Flicking the last ash into the water, I saw a smallish inflatable canoe coming from near the largest and likely still deserted nudist area, with the woman from the parking lot at the front, hair free. She took a long sip from a pint bottle as he paddled. Not very efficiently, using a hand to drink, but there was little reason for them to care with the lake so still, the lack of wind meaning that even minimal paddling created a certain amount of meandering progress.
Progress that grew even more erratic as she put her legs over the sides, beer still in hand. Being in the water almost at their level, my curiosity began growing. Turning to leave the water, I headed higher up on shore. Standing at my blanket, quickly toweling off before looking back at the slowly approaching canoe.
At this distance, the only way to guess they were getting high was how they held their breaths and shared the joint following stretched intervals, unlike with tobacco. She was the one that took the last hit before letting the end drop into the water, kissing him a final time before stretching her legs to settle deeper, draining the bottle.
Standing on the shore provided a considerably better view, making it obvious she was turning on her partner. A sensed desire on her part appeared likely, based on brief speculation seeing her back in the parking lot, feeling a certain mutual horniness while looking at her. Putting the empty bottle down, she pulled her bikini bottom to the side. The way it attracted attention on his part was plain, even at this distance. A gentle wind began blowing, and pushed the canoe on a fairly straight diagonal to where I was.
They were not paying attention to me watching as she took off her bikini bottom, legs raised and together, not hiding what she was doing. She returned to sitting with her legs dangling in the water outside the canoe. The way he sat and the way his arm moved made it possible to imagine him jacking off. A thought already starting to cross my mind in a sneaking naughty way, behaving in a different fashion than typical, the lake remaining empty.
The thought that she arranged this - the time they arrived, the beer and weed, plus something to conceal what they were doing on the water - popped into my head. Women enjoy opportunity as much as men, and it would not be the first time someone had gotten high and played sexual games in the middle of the water. Being turned on outdoors has its own attraction, separate from any element of exhibitionism.
How they kept gradually approaching was unexpected, just like the fact the canoe remained length on, providing the same view over time. Seeing whether her nipples were erect under the top was not possible, even if she could probably see how my cock had swelled when glancing over at the shore, though not changing angle exactly.
Looking at them, no doubt existed that the same thoughts were bubbling through the shared haze of just smoked weed. She pointed to the small cove, and he started paddling, still fairly erratically, to shore. She did not put her bottoms back on, and as they got close, an explanation was found in her first question - were they at a nudist lake? A definitely stoned style of question, with me standing there naked.