My parents remarried and I got a cute step-sister, so I shared a room with them until we rebuilt our house! Even though we shared a room, it was my room, so I was dressed defenselessly and my panties and breasts were showing, and we slept together in a row! I couldn't stand that kind of lifestyle, so I kept touching their breasts and asses! They pretended to be asleep because it felt so good, but it didn't end there... They devoured each other's dicks, and my erect dick was sandwiched between their tits, asses, and pussies in a divine 3P!