Dipression and mental illness. Doctors?

My mother-in-law is suffering from mental illness and dipression from past 5-6 years. The symptoms has been gradually increasing from last 5 years and it reached to such extent that she don't have trust on anybody. She is professor by profession,her promotion is due since long time and having some salary issue . According to her belief all the people are against her and conspirating against her road to success. Normally she is very cool, calm and understanding but whenever she is dipressed she get aggressive and unfortunately now she is frequently tends get aggressive. She used yell and alley everybody, she links everyone whoever's name she hear and imagine them as enemy of her or helper of her enemy. This is very difficult to have offline consultant because she not willing to go to any doctor Please suggest how can we consult to online doctors