This is a sad story.
The story mainly says an old man marries a young lady.

They lived a happy married life.
After the lady died,
a third person found her disloyalty to her husband.
Ironically,
the third person got her promise that
she won’t let others catching her being false to her marriage vows.

Yes,
she did keep her promise.
However, unfortunately,
she still used other men's love to get her dream jewelry.

There is a quote in the story,
“Is it possible to have complete confidence, absolute trust in another human being?” 
Well put！