When she was hospitalized for taking a bullet for Mu Heng, Mu Ning said that the Mu family doted on her very much. They did not expose her identity because they were afraid that she would be hurt like the original Mu Tian.
Lin Yin really wanted to ask, so she really asked, "Mu Ning said that she's the fourth daughter of the Mu family. You didn't reveal her identity to protect her because you were afraid that she would be hurt by the enemy like Mu Tian?"
Mu Ran widened her eyes and looked at Lin Yin. Then, she sneered and said, "I knew she was talking nonsense. What Fourth Child? She didn't reveal her identity to protect her. Bullsh*t! She hasn't been allowed to appear as the Fourth Child of the Mu family because she's an imposter. She even wants to replace you as the Fourth Miss. She's not even qualified to be the Fifth Miss!"
Mu Ran did not hide her anger towards Mu Ning at all.