The Lord of the Mansion      

Xin chose to put Midnight Duchess behind him, considering the [Love Enduring Sacrifice] as the price he paid for her past sacrifices.

It saddened him, though. He had come to see her as a friend during their journey together. 

However, he realized now that her true nature as a thief surpassed any friendship they had shared. Loyalty and friendship weren't her priorities in the end.

Sighing once more, Xin accepted it as a valuable lesson for the future.

Feeling the need to protect his companions, Xin decided to share the truth about Midnight Duchess with Victor and the others.

He knew he couldn't keep it a secret. Revealing her betrayal was essential to ensure their safety. He feared that if they encountered Midnight Duchess again in the future, they might lower their guard.

[Grey Smoke: I suspected as much! That deceitful, conniving thief won't escape my wrath next time I see her!]