Anxia walked into Elliot's room and realized that someone else had entered this room apart from Elliot and Mei Yin. Her instincts told her the outsider had installed a bugging device in this room.
Every room in this mansion had been wired, so Anxia wouldn't be able to talk about her strategy with Mei Yin or with Elliot.
"Elliot, come here," Anxia called her son because she wanted to make sure that the child was not injured. She did feel confident that Mei Yin would take good care of her son. But she was certain that Song Lei had thousands of ways to get Mei Yin to leave Elliot alone.
Because of that, Anxia was worried that Song Lei had gone to see her son yesterday and threatened the boy to make Loraine Shu seem so confident that Elliot would not want to go with her.