I live in a very popular tourist destination in Europe, by the sea. I am middle aged and married now, but I used to fuck quite a few single ladies on holiday, being their summer adventure, when I was younger. Now, to make things clear, that doesn't mean I had 10 girls per season, but at least two or three per season, in a span of some ten years.
The hottest encounter ever, were these two, older ladies for me at the time, a younger one was married, early 40's, older one somewhere north of 50, divorced. I fucked them both at the beach, at night, after the club. It wasn't a threesome per se, first I fucked the younger, married one, then the older, and even got up her ass, without even asking, but she did not protest.
The best thing is, after we were done, we stayed there some more, talking, and I found out they were actual cousins.