According to an instruction of walking through, I put a vote of “yes” as a council member, then I rushed to the bar and changed the servant’s disguise. I poisoned the food (small cakes in green container) and pressed G (serve) to Sophia when she entered the interaction range. She took a look at the food and said she prefer to keep an empty stomach.
It was the same reaction when I tried before the vote. So, what exactly should I do to make here eat?