For the whole of his life, nobody had ever insulted Si Ning directly to his face that he was so shocked it was written all over his face and the worst part was he was insulted by his mother in law which means he should forget about having a peaceful marriage because it was all written on her undisturbed pretty face that she didn't agree with him getting married to Xiu Zhicheng and she doesn't seem to like Concubine Ling.
To be called a wretch had shown that the Queen Dowager didn't come to say hello to him or wish him a quick recovery and from the way she behaved means they had to be some sort of enemies and Si Ning had no idea what might have caused it.