Regret 

Ye Tong didn't see Gu Xingfeng's reaction thus she's unaware of the impending danger. 

"My son was at fault for your son's incompetence?" Huo Zichu said as she smiled at Ye Tong. "Ah. I know, I know. My son is too perfect the world hates him, thus your son killed my son, right?" she asked as her eyes narrowed while she looked at Ye Tong whose face registered shock. 

Ye Tong gaped at Huo Zichu in disbelief. "You - ! My son wouldn't do that! How dare you!" she said as she raised her hand, but Huo Zichu caught her arm. "AH!" she cried when Huo Zichu squeezed her arm. Her eyes became tearful because of pain. 

Rong Si was dumbfounded while Huo Huainan and Gu Xingfeng immediately separated the two women. The Lu couple was stunned by them. They are pacifists, thus they aren't used seeing the kind of this scene. 

"You! I'll sue you!" Ye Tong said as she glared at Huo Zichu. Her arm had turned purple. It looked horrifying on her fair skin.