In Princess Zhu Huan 3, which episode gave birth to a swallow for the first time?

In the second episode of the third part, in Jingyang Palace, the swallow complained about the difficulties created by Lafayette. No matter how hard he tries, in the eyes of Lafayette, the swallow is "immoral" and "unruly" and has repeatedly threatened to help Yongqi choose another wife. Yongqi understood the feelings of Swallow and saw the Swallow who worked hard for him after marriage. However, he knows more about the demands and helplessness of the royal family. He likes the free-spirited swallow very much. However, since I am in the palace, I have to face some involuntary situations. No one can replace his love for swallows. On a rainy day, the swallow accidentally slipped and miscarried while moving books in the library.