Meal Time

During meal time, son and daughter are talking. Father feel annoyed and he tell them.
Father: Do not talk during meal time.
Son: But I want to tell you one thing dad.
Father: No, after meal you can tell me.
After meal time, father talk to his son.
Father: What do you want to tell me moment ago?
Son: Time is over. I want to tell you that that there was a fly in your plate.
Father: Nope