Empty carriage, only the rhythmic clatter and son jerks off. She locks the door, strips, and straddles the seat facing the window. Moonlight paints silver across her skin as she chants “son jerks off” in time with the rails. Four fingers stretch her open; the wet slap echoes louder than the train. “Everyone outside, see son jerks off come,” she gasps. The train enters a tunnel—darkness swallows everything except her rising “son jerks off, son jerks off, fuck, son jerks off!” until she explodes, soaking the leather in a flood of unstoppable “son jerks off” release.