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