This happened many years ago while still in high school. To this day, it remains one of my top sexual experiences, if not my best ever.
To properly present this story, I need to give a bit of background information. I was dating Sarah and Sarah had an identical twin named Jessica, who often went by the name of Jess. Sarah and Jess had a very… special relationship. They were the only children in the family and their parents would often go on trips, weeks at the time. Their father was a businessman who had to travel all over the world and their mother absolutely loved traveling in general, so she often joined him. Sarah and Jess would sometimes join them, but the school year made that a bit more challenging. Neither Sarah nor Jess liked travel much and they were more of a “hang out with friends / small parties with movies” kind of girls.