In Martina Cole's gripping crime thriller "Two Women", themes of regret and the irreversible nature of choices are prevalent, underscored by historical quotations. The phrase "No time like the present" from Mrs. Manley highlights the urgency of action in relationships, while Elizabeth Thomas's words reflect the dangers of rushing into commitments without true understanding of the partner involved. This suggests that hasty decisions can lead to long-term regrets.

Moreover, Shakespeare's assertion that "what's done cannot be undone" reinforces the notion that past actions are permanent and inescapable. These quotes serve as a poignant reminder of the complexities of love and the consequences of choices, creating a rich backdrop for the intense dynamics between the characters in Cole's novel.