If it was possible, Mo Feifei would rather not get into the car.
She remembered when she first came into the Shang Family, Shang Mo told Big Mountain to call her because he suspected that she was an illegitimate son. Hence, he asked her out for a simple 'conversation'.
On the surface, it looked like a conversation but it was actually a threat and probing session.
Since he did not want Granny to find out, they left together. But while they were talking, Rong Mo already wanted to leave on her own.
It was mainly because she felt uncomfortable after hearing what Shang Mo had said to her.
However, at that time, to not let Granny grow suspicious, Shang Mo had asked Big Mountain to invite her into the car. Unfortunately, she rejected and randomly found an excuse that she wanted to go out to get something.
Yet, Big Mountain told her that Shang Mo didn't like people rejecting him.