There could be nothing worse to an Indian women than not being accepted by her inlaws, and should tha be the case, she cannot go back to her parents' home . That is the supreme disqualification, and would bring shame to her family, and her younger sisters would not find marriage possible. She is not brought up so as to be able to provide for herself, and cannot even contemplate life without a man to look after her. She is caught in a bind- which she can solve only by dying. So if there are many who , in spite of all , might draw the line at suicide, they can always goad the bride enough to achieve their ends.
Murder too needs some kind of carriage.