If she does not have any other visa and plan to use AP to enter US, then you need to apply for 2nd AP in another 6-9 months so that she can come into US after first AP's expiry.
If she plans to enter US before expiry of AP then there is no need to worry.
There is no special provision for such cases.
Getting or applying for AP (the second one especially )when the candidate is outside US is a definite risk.
If she cannot enter US before AP expiry or if 2nd AP is refused, she will have to wait till your 485 approval (assuming you are the primary beneficiary) and apply through the US consulate in home country- will take between 6-9 months from your approval date.