Complex sentence: But when he takes Zaara to the train station, the truth about her engagement is exposed when they are met by Raza Shirazi, Zaara's fiance, who, at Zaara's father's request has come to "chaperone" his daughter back to Pakistan.
Split into simpler sentences: But when he takes Zaara to the train station, the truth about her engagement is exposed. At the station, they are met by Raza Shirazi, Zaara's fiance, who, at Zaara's father's request has come to "chaperone" his daughter back to Pakistan.