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Satyabati is married at about eight, fights her in-laws for her own literacy, and moves to Calcutta so her sons can be educated. Her mother-in-law and husband then marry off her young daughter Subarna without her knowledge or consent. Rather than accept the fait accompli, Satyabati walks out of the household for good and goes to her father in Benares, trading her family life for a refusal to be complicit.
In the joint family, the everyday policing of girls is done by mothers-in-law, aunts, and elder women, whose limited status depends on upholding the customs that once confined them. Male power sets the rules, but female seniority carries them out. That is why a rebel's fiercest opposition comes from inside the women's quarters rather than from men directly.
For a girl in a society that forbids female learning, secretly learning to read is not self-improvement but a direct challenge to authority. It gives her access to arguments, and the confidence to answer custom with reasons instead of accepting it as given. The household's alarm at a reading girl shows that the rule protects power, not modesty.
One woman's rebellion rarely frees her. Instead it opens ground that her daughter and granddaughter inherit and push further, each blocked by different constraints. Read this way, a single life that seems to end in defeat or exile is the first installment of a promise redeemed only generations later.