When Madam Lu had offended Fu Zhi, she'd refused to give her the medicine or treat her heart attack. She had kicked her leg until she'd nearly had to put a cast on it, and she had made her pay her a lot of money.
Therefore, Lu Yumo could more or less guess that Gu Yan must have said something that she should not have said or done something she should not have been doing. Otherwise, there was no way Fu Zhi would have reacted so violently.
However, compared to Madam Lu, Lu Yumo knew that Fu Zhi was more lenient with Gu Yan because Gu Yan was treating Lu Yushen.
Gu Yan's face was dark.
She wanted to say, "Do you know who you are talking to?" However, upon contemplating it, she swallowed the sentence back to her stomach pit. After all, she still needed to stay in the Lu Mansion, and it would not do her any good to have a fallout with him right now.