It is paranoid to believe that your parents poisoned you.
Edgar is eating dinner that his mother prepared for him and something seems off about it.
Edgar wants to know if the food is safe.
Edgar suggests to his mother that perhaps an ingredient she used in the meal was expired.
Edgar believes his mother has deliberately tampered with the meal and says as much to her.
Edgar's mother feels embarrassed about the potential mistake and checks all the food labels to make sure the meal is safe.
Edgar's mother is saddened and offended by the notion that her son thinks she would deliberately harm him.