The metro's hum drowns her moans as he rams his throbbing cock into her ass, her body jolting with each thrust. She bites her lip, trying to stay silent, but her ass clenches tighter, milking him. He grips her hips, pounding harder, his balls slapping against her clit. The train lurches, sending them into a passionate grind. She comes undone, her ass pulsing around his cock, his hot seed filling her as the train pulls into the next station.