i think she could not stand it that how an uneducated woman got a family and day by day she became jaluase about her that even the father in law have given the house to her and every one loves her where as she left her husband for the man who does not want to marry her ,all that along she have been trying to put anupama down that is all her reason have been .
There is a saying "Dusro ke mahal dekhke apni hut nahi todni chahiye"
Anupama jaisa bante bante woh khud pagal ho gayi hai