A widowed girl is treated badly because  , society will say that because of marrying her , her husband had died.
In india, widows are equal to untouchables. they are not allowed to take part in the religious festivals and occasions. widows are often considered to be cursed because it is believed that they will bring ill luck to their families as her life is ruined with her bad luck. it is considered that : as she lost her husband, she has a very bad luck and her whole life is ruined. she may spread the bad luck to the persons who dwell near her. so they are abandoned in the society.