I bolted away suddenly, lunging for the bedside lamp. It cast a harsh light onto the scene in my bed: my kid sister lay on the bed, looking at me with concern and lust. Her panties were soaking wet, her hand still inside where mine had been moments before. Sam's gaze moved to my cock, and she licked her lips. "Oh, Matty, it's so... so hard." She reached for me. I started to move back, but she was faster. Her hand began to stroke me again. "P-please-- please, Matty, I was so close. Please-- please!"

I shouldn't have. I know that. I don't know if it was the lingering effects...