One possible theme could be regret. Looking back at a past relationship often involves thinking about things that could have been done differently.
Another possible theme could be forgiveness. The husband may have to forgive his wife for her past actions, and the wife may also have to forgive herself and move forward in life.
One possible theme could be the contrast between life on land and life at sea. Maybe it shows how different the two are in terms of lifestyle, relationships, and challenges.
Growth and self - discovery could be themes as well. As Jolene goes through life, she may learn more about herself. Another possible theme is friendship. Friends might play an important role in Jolene's life in the novel.
The themes might include power dynamics. Since he is a CEO, there is a power imbalance which could have contributed to their relationship problems in the first place. Also, second chances. The ex - husband is seeking a second chance at love with the protagonist, and she has to decide whether to give it to him. And vengeance itself is a theme, which drives the initial actions of the female lead.
Love and its aftermath could be a major theme. After the break - up, the characters may still have lingering feelings of love, but also feelings of anger or hurt. The novel might also explore the theme of change. The change from being in a relationship to being an ex is a significant one and can affect many aspects of a person's life, such as their daily routine, their social circle, and their self - identity.
One possible theme is redemption. The CEO might realize his mistakes in how he treated his ex - wife during their marriage and try to make amends. Since she is a doctor, her profession could be a factor in his journey of self - discovery. Another theme could be competition. Her medical career might put her in a position to compete with the CEO's business empire, adding an extra layer of tension.
Love and loss could be themes. There might be relationships that are affected by the twists in the character's life. They could lose someone they love or find new love in unexpected ways. Also, the theme of fate or destiny could be present. The twists could be seen as events that are meant to happen, guiding the character's life in a certain direction.
One possible theme could be redemption. Characters in the afterlife may have a chance to make up for their wrongdoings on earth. Another theme could be discovery, like finding out the true nature of the afterlife world.
Power and ambition could be a major theme. The idea of striving to be a lord implies a desire for power and status.
One possible theme could be self - discovery. In a mysterious life, the main character often has to figure out who they really are.