Praise be to Allah.the Lord of the Worlds.
If what is described in the question is true, then it is a lesson and a warning about how sin can destroy homes and families. Every Muslim must repent to Allaah and give up sin and disobedience.
It is very strange that this sister does not want to write down her reasons for asking for divorce. She should respond to this request what harm could it possibly do?
If the influential person who is responsible for the affairs of the Muslim community in that place sees that there is no possibility of reconciling the two partners and continuing the marriage, he should issue a divorce (khula divorce instigated by the woman) freeing her from the husband, on conditions that are mutually acceptable.
We ask Allaah to protect our families and the families of all Muslims from fitnah (temptation, tribulation), and to rectify all our affairs.