What should a wife do regarding her husband who secretly married and neglects his family responsibilities, and should she tell him about her knowledge or remain silent and patient?

The husband must fulfill his duty towards his wife and children by providing for them and treating them kindly. It is not a condition to inform the first wife when marrying another. However, she has the right to demand justice between her and the other wives in terms of lodging and financial support. Silence is preferable if it serves the interest to avoid problems.