He knows that there is a quarrel between them. The last time he brought Muli night here, he didn't tell his mother and sister. This is what Cheng Xiaozhan later heard from his mother.
Moreover, before he saw his mother and sister, muliye specially told him that he was sent here the day before, and that he should never say anything in front of them.
Cheng Xiaozhan asked why Mu Li didn't...
at night