A coherent joke

The boss said to his secretary, I'll take you to Beijing for a walk these days. You are ready.

The secretary called her husband: I'm going to Beijing to have a meeting with my boss these days. Take care of yourself.

Husband calls his lover: My wife is going to Beijing for business these days. Let's come out and play.

My lover called the little boy who was cramming lessons: I have no classes these days, so I have something to do.

The little boy called his grandfather: Grandpa, the teacher has something to do these days, so there is no need for class. Please play with me.

Grandpa called his secretary: I'm going to play with my grandson these days and I can't go to Beijing.

The secretary called her husband: The boss has something urgent these days, so we won't go to Beijing for a meeting.

Husband calls his lover: I can't come out to play these days, and my wife won't go to Beijing.

My lover called the little boy who was tutoring his homework: I will continue to have normal classes these days.

The little boy called his grandfather: Grandpa, there are classes these days, so I can't play with you.

Grandpa called his secretary: I'll take you to Beijing for a walk these days. Are you ready?