From the time Tan Rou entered the venue to Monica losing her sanity, it had not been more than 15 minutes, and all the food on the table was from the palace. Tan Rou's bag had been checked already, and apart from some sunscreen, there was nothing else in it.
Hence, she had no opportunity to poison Monica. Moreover, Monica hadn't eaten anything given by Tan Rou, so how could Tan Rou have had the chance to poison Monica?
"You wicked foreigner," Monica said, laughing, "you must have used the witchcraft of your country! Quickly release me from the magic, or I will never let you off!"
Tan Rou rolled her eyes and said, "I'm sorry, but people from our country do not practice magic, and I haven't cast any on you. You might just be ill. If I were you, I'd hurry to the hospital right now, or call a doctor to treat me, instead of hurling accusations."