I felt her hands slowly work down my chest, over my ribs. Her crotch dipped closer to my face as she moved it around. Without being fully aware of it, I applied some pressure to the top of her thigh with my hand, encouraging her to move down. She didn't need much encouragement and in a moment she pressed her panties against my face. I opened my mouth and began to hungrily kiss her through the fabric. It was a weird and mind-blowing thing I was doing - kissing my sister's crotch. But I wanted it and by the way she was pushing herself against me, it was clear she...