Thanks for your question.Marriage is a social bond. We can say it is like a system in where a man and a woman can live together.You know we are all different from each other.So the answer to your question. A girl has to love her husband after marriage or she simply falls in love with him is different in each marriage.I can give you some example then you can understand what I am trying to say. Sometimes a woman marries a man who she does not know.As she does not know him she falls in love with him only for marriage.If a woman love someone and she married an another man.It is possible that she does not love him after her marriage.There is also an another possibility that she forget about his lover and love her husband.In love marriage, the man and women are love before their marriage.Actually, there is no fixed answer to your question. It mainly depends on husband’s and wife’s mentality.I think you found your answer.