Laughing we looked back at the couple before cleaning ourselves in the cool moonlit water of the lake. Then we sat by our own fire, just chilling. Finally we crashed out in our tent. Exhausted, naked and happy. During the night I had sex with my sister again, burying my cum deep in her cunt. We fell asleep again, before I woke up with the morning sunlight streaming through the open doors of our tent. There was no sign of my sister but I felt, then saw a hand on my cock. A dark brown hand. I loved the contrast of her dark skin against my light skin. I turned...