Honking Horn

Twice a day, Monday through Friday, I hear a honking horn from the street behind my house. It is the horn of a mini bus waiting for the mother to bring out the child in the morning and retrieve the child in the afternoon. The bus is always on time to the minute. Why can't the mother be waiting at the door for it? Sometimes the bus waits for at least five minutes. If I am annoyed, the bus driver must be more annoyed. How can someone be so inconsiderate?