She wanted to live a better life with Gu Zhou. She wanted to become Gu Zhou's wife. She wanted to be the madam of the Gu family.
However, Xiao Shi's persuasion made her realize something.
Xiao Shi was on Gu Zhou's side, not hers.
Xiao Shi did not want her to be with Gu Zhou. In order not to let Xiao Shi cause trouble, she added a sleeping pill to the water she drank, hoping that Xiao Shi would sleep when Gu Zhou came over.
She really hadn't thought of harming Xiao Shi. She just hoped that she could sleep.
Now, it seemed that Xiao Shi knew that there were sleeping pills in the water, so she slept obediently and drank the water with sleeping pills.
She had thought that the medicine was especially effective, so she fell asleep.
Now, it seemed that Xiao Shi was just pretending to be asleep!
At that time, she was so focused on how to negotiate with Gu Zhou that she left in a panic and did not take the bottle of sleeping pills with her.