Cumming for All The World To See: A Slave Masturbates Out Her Window For Her Master (An Erotic S&M Story)

A slave girl is forced to write out degrading things on her skin... unable to resist, she begins to have her way with the marker before finishing. Later, she's instructed by her master (who is watching from a car on the road) to stand in the window and pleasure herself for all in the world to see.