I understand Danyang's anger regarding her husband's possible infidelity. However, what she is doing is wrong. Shiyi is tried to warn her that she was putting her husband's concubine in danger. She's creating a potential danger. If she would've listened to Shiyi's warning then things wouldn't have escalated to this point. She put herself/her baby in danger just to get even with her former maid. I really hope she learns her lesson.