Before my sister-in-law got married, she was an interior decorator for very high-end suburban clients. One client asked her to house-sit their sizeable house while they went on vacation. She asked my wife if we would be interested in coming over one evening and having beers in the hot tub on the back deck. My wife said she was busy, but said that I could go if I wanted to. Of course I said yes, got my bathing suit and some beers, and headed over there. After a couple of beers, I announced that I was going to take off my bathing suit, and I did. I was rock hard but below the water level so she could not see. Then she offered to take her suit off and we were both in the hot tub naked and getting drunk. I would like to say that we had hot sex, but I got cold feet and she got sick. I had to carry her upstairs to a shower to get her cleaned up and sober. Seeing her completely naked was pretty cool. Nothing has happened with her since.