What do their actions reveal about how their relationship has changed since the death of duncan?

After Duncan's death, Macbeth and Lady Macbeth's relationship deteriorates as guilt and paranoia consume them. Macbeth becomes more isolated and ruthless in his pursuit of power, while Lady Macbeth descends into madness as she struggles to cope with their actions. Their once close partnership crumbles under the weight of their shared crime, revealing a profound shift in dynamics and trust between them.