what would you do in this situation?

my friend who is american met a man living in the usa who is originally from morrocco. he said he want to marry her that he love her only.he said he already has his visa papers he dont want her for that. can someone tell me how do these men treat their women? she is a christian he is muslem. will he make her stay home at all times uless he is with her? will she have to cover up? what will her life be like if she accepts? she already has children from a previous marriage. will my friend be safe with him? does anyone know of any relationships like this one?