Mrs. Gu Sr. was an astute person. Although her son was talking to her, she noticed that he kept glancing at Sister Ning, appearing rather distracted.
When she thought about her son saying he wanted to give up the title and go to that house, Mrs. Gu Sr.'s smile faded slightly, and she wasn't in the mood to continue the conversation. She had planned to speak to Sister Ning about it but feared it might upset her, thus she didn't bring it up.
Now seeing that her son cared about Sister Ning, Mrs. Gu Sr. felt both happy and worried, uncertain of what to do.
Their strong feelings for each other were something she was pleased to see.
But if her eldest son gave up the title and the Marquis Mansion for Sister Ning, what was she supposed to do? She realized in her heart that even if her son really intended to do so, it wouldn't be now, but after she was gone.
So, there was no point in talking to her son now or asking for a promise. Once she's gone, her son would do as he pleases anyway.
