Should I take this deal?

Ok so a friend of mines husband needs someone to get legally married to one of his friends to get legalized to work for 20k I don’t know the man at all but I would have to go to New Jersey and send documents and have a wedding and all of that but the only problem is I have a live in boyfriend and I feel like I would be doing something wrong if I did that even though it’s not foreal I just need a second opinion on it.