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