What is the ruling on a wife's insistence on opening the bathroom window while bathing and her refusal to close it, and what should the husband do regarding this behavior?

If the window is open such that the wife can be seen naked, then this is not permissible, and she must close it or use a covering. The wife must obey her husband in this matter, otherwise she is considered disobedient (nashiz). Regarding divorce, it is advised not to rush into it for the sake of the children, and to continue trying to reform the wife.