Brown's affidavit, which was released on Friday, suggests that the Eskom board did mislead her about Molefe.
This follows weeks of turmoil at the power utility, including the resignation of board chairperson Ben Ngubane last week.
Brown has in the past backed Molefe, Ngubane and the Eskom board as the best hope for the power utility.
However, relations seem to have broken down.
Ngubane appeared on Gupta family-owned TV station ANN7 this month, calling Brown's decision to rescind Molefe's appointment a comedy of errors.
