[stevezr1]

1970's, I was with the first wife:
One summer we took a two-day drive out to visit her younger hippie-sister in a southern Arizona desert town for a week. Her husband needed to work long hours every day, but she was between jobs, so it was a good time to visit. They had a little bungalow at the dead end of a street, and the nearest house was about a hundred yards away. Their house was on an angle, so their back yard looked out over desert as far as the eye could see with no other homes in sight.
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We arrived in the evening and got settled in. The next morning by the time we got up, the husband had already left for work. We had breakfast and the wife decided we should go to the mini-market in town to get some groceries. When we got back, SIL wasn't in the house. We were wondering where she was, and a few seconds later she walks in the back door, completely naked! "oops, I was just hanging out the laundry".
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She plops down on a living room easy chair still naked with one leg dangling over the arm on the sofa complaining how hot it is! The temperature outside was already like 110+. And while the house had a window "cooler", not air conditioner, it was hot, but bearable in the house. She would have been displaying all her inner glory to us if it weren't for the thick hair-jungle.
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She then explains that she always goes out back naked for short periods of time to work on her tan. Then she says that the laundry will be dry in a matter of minutes, so she might as well just stay naked. Meanwhile, my wife is dumbfounded! (and I am too) The SIL was average/athletic build, small firm tits. She had lived with us for a while as a college student, and in the summer thought nothing of hanging out at home in just a tee-shirt and panties. My wife wasn't happy about her casual dress, and never made an issue of it, but for sure, she was never naked!
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Shortly after that she went outside to get the laundry, and she invited us to step out back and see the view. It was impressive, nothing but desert and cactus. By now it was crazy hot and the wife and I were back inside in no time. The wife held the door open for the SIL, and came back with a basket of laundry and proceeded to fold things up at the table in the adjacent kitchen still naked with my wife helping her. Then she carried the stack of clothes into the bedroom and came back out with baggy short-shorts and a light man's unbuttoned shirt.
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That was the most clothes she wore the whole time we were there. We immediately fell into the "keep cool" clothing mode. My then-prude wife surprised me by how quickly she followed her younger sister's lead, wearing similar clothing, including one of my well-worn athletic t-shirts with her "C" cups swaying, even when her BIL was home.
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Laundry again the next day, and the SIL asks the wife if she'd help hang out the clothes. She says sure... and starts to follow the SIL who is again naked, when she hesitates. She looks at me with this mischievous grin, and pulls off her shirt and shorts, and steps out back, pauses, looks around for a moment, and strides out there to help hang the laundry, and also helps water the few plants they have out there. And yes, they had a little patch of "weed" growing too!
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What a sight to behold when the two naked sisters come walking back in together! The SIL then says to my wife, "we don't really need to get dressed, do we?" The wife wasn't expecting that, but agrees. But then quickly asks what time the BIL gets home! They spend the rest of the day naked, with a few more trips out back for laundry and to tend to the plants. And for those trips outdoors, guess who they convince to leave his shorts behind!
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And yes, before the week was over, the wife got caught naked by the BIL a few times, and while she tried to be nonchalant about it, she wasn't comfortable staying naked in his presence. An interesting vacation to say the least.
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