This was our first time and we were exciting and afraid at the same time. I was a bit cold at first but the moment my sister sucked on my breasts I felt like a river was coming out of my pussy, I got immediately wet and started moaning. I didn't know from were that came that moanings, but it was enough to let my sister wet too, I felt it when I put my hand on her crotch. My brother was taking the pictures and at the end we've noticed a huge volume under his pants...