Old Madam Gu's stance was as clear as the sky over their heads.
Though she did sympathize with Gu Mu and her tragic death, Old Madam Gu had always been a woman who cared about the benefits of her family over everything else. Thus, she could see Kong Tai's guilty conscience much more clearly than Gu Zedong who had her eyes covered with rose-tinted glasses.
The second Kong Tai refused to accept Lin Jing's suggestion, Old Madam Gu knew that there was something wrong with the matter. After all, with how much Kong Tai loved Gu Mu, he should have been the one bringing up Yamen and a thorough investigation but he didn't in fact he even stopped Lin Jing and tried to play her daughter like a fool.
There was something very fishy!
Kong Tai on the other hand was a shivering mess. He knew that he was in a big trouble. If she were to find out that Gu Mu had threatened Gu Ke Jin or their family, then Old Madam Gu would never let him off.