Why is the duchess relieved when piney says no she doesn't wanna pray?

The duchess feels relieved when Piney declines to pray because it suggests a level of independence and autonomy in Piney's character, which contrasts with the oppressive environment they are in. The duchess may also see this as a moment of solidarity, as both women navigate their own struggles against societal expectations. Piney's decision not to pray could symbolize a rejection of imposed beliefs, allowing the duchess to feel a sense of connection and hope amidst their shared adversity.