Mental health of my wife. To all.

Hai sir/madam i got recently married.my wife is suffering with some mental imbalance condition from last four years but our father in-law hide her situation from us.she has features like illusion that some cine artists are harasing  and attacking her and proposed her and her mother also talking with her . unable to do her regular works such as did not identify necessary things needed to bath,sit and think some thing not talking with others even sitting in a crowd or alone,pre occupied mind,giving response after calling her too many times . this problem will be rectified by giving which kind of treatment .Can any one of u  suggest best solution to recover my wife from this problem and lead our life happyly for long period .it is my humble request to all .