It's bad to lie to someone close to you.
Sue asks her brother John to buy her dinner when he is back home from work.
John wants to respond to Sue's request.
John tells Sue that he can buy her dinner after meeting with his friends but it might be a bit late.
John tells Sue that he needs to work overtime and won't be back home early.
Sue thanks John for his help and waits patiently for him to come back.
Sue sees John in the street with his friends and knows that John has made up a story to reject her request.