After He Xiwen left and even closed the door behind him, Luo Muchen turned to his mother who was straightening out her clothes and asked, "How did he even get in here?"
That in itself was a mystery for Luo Shih. Each time he did this she would look through the surveillance to find out how he got in. They would improve security in that aspect but time and time again he would find loopholes and take advantage of it.
If he can't succeed he would find her outside the company and try and convince her to be together again. Luo Shih pulled her hair back and said, "Don't worry about it. Even if he comes back he won't hurt me anyway."
Luo Muchen knew that but if his mother didn't want to see Hei Xiwen something would have to be done. He sat down on the couch after placing his school bag neatly on the side.
Please check out Venerable Demon King & The Doting Immortal