@KitBee Her father doesn't want them to get married. If he forced her to marry him then it would be disrespect to her family and he would be seen as tyrant. It is Asian culture, if our parents opposed of the marriage then we would listen to them. No one wants to be disowned by their parents. Impiety toward your parents is one of the worst sin.
@kiero13 Nah. You have a misconception. What you said is completely wrong. There is no discrimination about not taking husband's surname. My mother, grandmother, greatgrandmother all keep their family name. In most Asian countries, wives aren't required to take the husband's surname. It has been that way for thousands of years. Taking husband's surname is actually a Western thing, not Asian and it is quite a modern thing. It came from 19th century England. Currently, Japan is the only country with the law required wives to take husband's surnames.
The reason having a male child is important is because children automatically take the father's surname and it is also the same in the West. Throughout Asian history, there have been a lot of cases where the children chose to inherit the mother's surname or cases where the husband married in the wife's family and took on the wife's surname.