You will have some options, and I suggest that you and your fiance set a consultation appointment with an immigration attorney to fully discuss the risks and benefits to how you may decide to proceed. She may try to extend her visitor status, or decide to overstay and wait for your citizenship. You may also decide to marry and file an immigrant visa petition for her now, prior to your citizenship. Doing so would not gain any immediate benefits, but there may be reasons to do so. On a most basic level, if she overstays she needs to be pretty committed to remaining in the US until she has her status adjusted. If she leaves, she should do so prior to overstaying. But her options are a bit more complicated and nuanced than that, and a full discussion would benefit you both.
Answered on Mar 21st, 2012 at 5:51 PM