What does the last episode of Dark Glory mean?

The heroine exposed the perpetrator, leaving a new suspense.

In the last episode, Dong En made two women's husbands doubt her past and began to investigate the truth about the disappearance of the tattooed man. She completed her revenge plan in stages.

This is a Korean drama with a lot of foreshadowing at the end. It is a work that tortures people's souls and has great practical significance.