What should a wife do about her husband's injustice in not being equitable between her and his second Christian wife, with whom he spends all nights?

The questioner is advised to be more patient regarding her husband's injustice, for justice is an obligation that is not waived by people's satisfaction or displeasure, nor is it permissible to wrong the first wife to win over the heart of a non-Muslim woman. Despite this, it is not advisable to destroy the family, but rather to be patient and give reform sufficient time, to use kind words, to involve wise people if necessary, and to be keen on inviting the husband to maintain prayer and strengthen his connection with Allah, along with increasing supplication.