What is the best option here?

This is obviously a pretty complicated situation especially for her. Why are they even going to their final interview if she doesn't want to be in that marriage anymore? My two cents, go for divorce from that person ASAP, especially since he has taken advantage of her for immigration purposes, something that is against the law and he should rightly be answering to the USCIS for this. She will not get in trouble for it assuming she thought the relationship was for real and not to evade immigration laws. You've mentioned coming over on a B1 tourist visa and then once her marriage has blown over get re-married. This sounds like blatant immigrant intent and you should avoid this. When you get a tourist visa you promise the U.S government you are staying only temporarily. If you have preconceived intent to get married when you apply for that visa, you're committing visa fraud and are likely to be banned from ever applying for an immigration benefit. Form I-129F Petition for Alien Fiancé(e) However, the action of getting married on a B1 visa is not in and of itself fraud, as long as you married then returned back to England so that your new spouse can sponsor you using the alien spouse petition using the basis of your marriage as her reason for petitioning you, this would mean you complete consular processing in England and if your visa is granted, you can move to the U.S to be with your spouse and then apply for Adjustment of Status for your green card to become an LPR (Legal Permanent Resident). Another option available to you is the fiance visa, this would allow your USC fiance to petition to allow you to come to the U.S. to get married. This would mean you'd go through the consular process in the UK and if granted the visa it allows you to come to the U.S to marry your spouse within 90 days of your arrival, from here once you're married you can apply for Adjustment of Status to get your green card. Both of these options unfortunately mean spending time away from your intended spouse. I think in general the fiance visa has a quicker processing time than the spouse visa, but it depends how busy the offices of USCIS are at that time. Just be very aware of immigrant intent as it can land you in big trouble. If you apply for a B1 tourist visa, ensure you're not intending to over stay and apply for adjustment of status. Although the overstay for an immediate relative of a USC is forgiven when applying to adjust status, it isn't if you always intended to come to the U.S using the tourist visa and never leave again. The only time it's generally acceptable is for example if you came over to visit on a tourist visa, and only after you were here did you both decide you wanted to get married, then you aren't accused of immigrant intent as the intent to stay happened later on while in the U.S and you weren't lying to the immigration officials, which is a huge no-no. I am sure you will get lots of advice from people on the forum, hopefully I have shed some light for you.