Complex sentence: When the Valide Sultan hears of her son's decision, she is filled with pride and arranges a celebration that night in honor of her son, and she orders Daye, her handmaiden, to prepare the most beautiful concubines for him.
Split into simpler sentences: When the Valide Sultan hears of her son's decision, she is very proud and arranges a celebration that night in his honor. She orders Daye, her handmaiden, to prepare the most beautiful concubines for him.