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Mod hat off: I see no need for the G-28. It won't help an RFE response. I see no benefit for obtaining an attorney as the consulate wants only evidence of your continued relationship. In addition, the letter mentioned a DS-260. That is not applicable to your case. Personally, I see no need to have a joint US bank account until after marriage. That is when mingled finances will be important. Just my opinion. Good luck on your journey.