Mistress seriously?
Lang could understand how her husband was feeling at the moment, she too was severely disappointed in her family when they kicked her out of the family after she got sick and could no longer work. She was the breadwinner of her family and her sister was nothing but a good for nothing lazy bum but because her mer gave birth to a proper son, her parents doted on her the most and despised her branch of the family. She had worked hard until she couldn't even move a single one of her fingers but what she got, in the end, was nothing but a stab in her back.
She hugged Zhu Qian and let him cry out his grievances, her husband was too upset because of what happened to their son and had no chance to let out his own sufferings. Being betrayed by those whom you trusted —— this kind of betrayal was something that Lang didn't wish even her enemies would ever face.