As you can read in my first post, I moved into a nice house with great housemates and a pool last year. We are five people living here, one of them (Marc) being the only guy and we girls all sleep with him.
When temperatures went up in late spring and summer we hang out at the pool a lot, obviously. Often it was just us but sometimes we had friends over as well and we threw quite a lot of small pool parties. Those pool parties differed a lot from one another. Sometimes it was just a few people, sometimes it was only girls, sometimes also guys and when it was just girls that already have had sex with Marc there were orgies as well at the parties. A few times though parties with girls that have not previously slept with Marc evolved in such orgies.