Agnes's estranged sister. According to neighbor Mrs Finch, she is rude and obnoxious, and was suspected of having an affair with Agnes's husband. Catherine claims Agnes was a drunk and vulgar woman. She admits to visiting her sister accompanied by her boyfriend Bob Baker, but disputes the circumstances of the confrontation.
Biological sisters with a fractured relationship.
Hostile encounter during a break-in attempt.
Indirect rivalry stemming from their shared connection to Agnes.
Official inquiry into Catherine's whereabouts and motives.
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