I am a US citizen and just got engaged to my Brazilian girlfriend. We are planning to get married at the end of December and submit the green card paperwork in February (I-485, I-130, etc). First of all, is it okay to wait 2 months after getting married to submit the green card paperwork? Secondly, we are currently living in different US cities and will be living apart until the end of February because of obligations she has with her host family. I am concerned that living apart for 2 months after our marriage would raise red flags for immigration. Is this true? Lastly, what kind of proof do you need to show immigration about the legitimacy of the marriage? I know there is an interview a few months after you begin the process. Is this the time you need to show proof or do you need to send proof with the initial green card paperwork? I'm just concerned about the fact that we will be living apart for a couple months after marriage. However, by a potential interview would occur, we would have lived together for at least of few months. Thanks for any and all help.