In which episode of The Legend of Zhen Huan did Concubine Xi give birth to twins?

In The Legend of Zhen Huan, Concubine Xi gave birth to twins in:

The 60th episode of the Harem·The Legend of Zhen Huan

On the way back to the palace, Zhen Huan was plotted against by Ye Lanyi. The cat pounced on his belly. Zhen Huan was frightened and had difficulty giving birth. She gave birth to twins under difficult circumstances. The emperor was blessed with a son and a daughter, and immediately issued an order: Concubine Xi (Zhen Huan) of Yongshou Palace, Imperial Concubine Jin Xi, would be conferred with the prince on the day when he was full moon; Concubine Xi would be given the power to assist the six palaces after she was born. The emperor named Longzi Hongluo, and the princess named Lingxi.