Final nail in the coffin

The expression "Final nail in the coffin" names the decisive act that completes a relationship’s destruction. In this passage, William King applies it to the dishonesty that ended his previous relationship, while recognizing that his own silence about Julia now places his relationship with Diana Jones under the same threat.

Meaning in Context

The phrase appears when William King is driving home after failing, twice, to tell Diana Jones the truth about his past marriage. He has just acknowledged that he loves her, but he is also afraid that disclosure could make him lose her. That fear leads him to confront the contradiction between his feelings and his conduct: he condemned Diana for withholding the truth, yet he is now withholding a truth himself.

The Earlier Relationship

William King identifies dishonesty as the act that drove the final relationship into collapse. The expression turns the breakup into a cumulative image: whatever earlier injuries or tensions existed, deception supplied the concluding damage that made the relationship impossible to preserve. His recollection gives the phrase personal force rather than treating it as a general proverb. He is not merely discussing failed relationships; he is measuring his present behavior against the specific mistake that already cost him one.

Repetition and Moral Recognition

The phrase also marks a change in William King's understanding of truth. He had previously treated honesty as a simple, almost absolute test, judging Diana Jones's failure to tell him the truth harshly. Now his own fear of losing her shows him that concealment is entangled with love, hope, and self-protection. This does not excuse his silence, but it complicates his earlier judgment: the situation is no longer black and white because he has entered the same moral dilemma.

The expression therefore carries an irony that William King cannot evade. He knows that dishonesty was the final destructive act in his former relationship, yet he risks allowing the same pattern to govern his relationship with Diana Jones. His silence is not presented as harmless postponement; it is a possible repetition of the act whose consequences he already understands.

Truth, Love, and Consequence

William King finally concludes that love demands truth. The image of Diana Jones's face after his declaration of love—marked by joy and complete trust—makes the concealment more serious, because her happiness rests on confidence in him. His decision to tell her the truth is consequently both an ethical resolution and an attempt to prevent another final blow from falling on a relationship he has only just admitted he wants.

Within the surrounding plot, the expression links William King and Diana Jones's romantic relationship to the wider concern with truth and trust in romantic relationships. It functions as a warning and a point of resolve: dishonesty once supplied the final nail that closed William King's previous relationship, and the recognition of that pattern compels him to choose disclosure before the same consequence overtakes his relationship with Diana Jones.