Betty and Donald’s Troubled Love
The A.B.C. MurdersThis thread traces Betty and Donald’s mismatch of expectations from attraction and jealousy through loss and the possibility of a new bond.
increasing
Bearing strength in each event
decreasing
An Unequal Courtship

Affection Without Agreement
Betty’s freedom
Betty enjoys flirtation, dancing, and attention from men while expecting eventually to settle with Donald. She sees these pleasures as temporary and harmless.
Donald’s devotion
Donald is quiet, serious, and intensely attached. He interprets Betty’s behavior as a threat to the relationship rather than a separate part of her life.
A Jealous Quarrel

Anger Surfaces
Lies are discovered
Donald learns that Betty’s supposed visit to a friend concealed an outing with a married man. The revelation intensifies earlier mistrust.
A frightening threat
Donald loses control and speaks of murder. His words later make Megan fear that he will be blamed for Betty’s death.
The Last Night Apart

Suspicion and Searching
A false account
Betty says she is going to St Leonards with a friend. Donald believes her at first, then becomes suspicious and watches for her.
A futile pursuit
He searches St Leonards and Hastings for the person he imagines she is meeting. His jealous distress is real, but it does not place him at the murder.
Grief and the Dream

A Mind Repeats the Crime
An unbearable image
Donald dreams of strangling Betty with her belt, only to see Megan’s face. The dream reveals guilt, fear, and emotional confusion rather than proof of murder.
A private confession
He seeks Poirot’s interpretation because he fears his own mind. The detective listens without treating dream imagery as evidence.
Love After Loss

A New Attachment
Memory shifts
Poirot tells Donald that Megan is replacing Betty in his heart, and that forgetting need not mean betrayal. Donald recognizes the truth in the interpretation.
A cautious beginning
Megan and Donald face a future not free of grief, but no longer governed by suspicion. Their relationship becomes one human consequence of the case.
Before the summer of 1935
About one month before the murder
July 24, 1935
After July 25, 1935
After Franklin Clarke’s exposure