You must not meet his father or brother with or without niqab as they are not your mahram. Once you marry, his father becomes mahram for you.

You must refuse and reject such a request no matter what the consequences are. There is no compromise in religion.

So, I can meet my fiancé as many times I want in presence of my Dad? But his father and brothers also want to see me. And my parents are forcing me to meet his brothers(without niqab obviously).They want my pic so that other relatives can see me. My fiancé is not in a favour. He doesn’t want to show me to whole world. He’s so nice.What should I do??