How did she 頂替了別人的名字來這裏?

Fake passport? She went to the visa interview herself (then what is the point)? If she went to the interview herself and got the visa, why bother 頂替了別人的名字?

Just don't get it. How did she do it?

Moreover, is she still using that other person's name? She got married under that false name also?

What she did is very serious, and I don't think she should come clean now. It will be self-incrimination.