Is it permissible to help one's brother divorce his wife, who has caused his religious and financial relapse and is threatening him with imprisonment, especially given the presence of daughters between them, and the difficulty and high costs of divorce proceedings?

This person and his wife have committed grave sins, the greatest of which are abandoning prayer and taking interest-based loans without necessity. They must repent and work on reconciling their relationship, and raise their children Islamically. If attempts at reconciliation fail, then it is preferable that he divorces her, and she does not have the right to custody of the two daughters due to her poor condition.