Complex sentence: Cinderella and the Prince marry under the approving eye of King Maximilian and Queen Constantina, as the gates of the palace slam shut on Cinderella's stepfamily; left outside as the Prince and his new Princess start their lives together.
Split into simpler sentences: Cinderella and the Prince marry under the approving eye of King Maximilian and Queen Constantina. The gates of the palace slam shut on Cinderella's stepfamily, left outside as the Prince and his new Princess start their lives together.