Assuming that her interest in you is real and not just to get a green card, you should take the same steps that you would take in marrying anybody. If you have a lot of assets that you want to protect, you should strongly consider a pre-nup. You may also want to do a background check to see if there are other issues you need to be aware of.
Answered on May 31st, 2013 at 11:45 AM