These waivers are very difficult to get and almost always require the assistance of an immigration attorney. If your wife is approved for the new provisional waiver of unlawful presence, she will likely only need to be out of the country for days or weeks.
www.gassonlaw.com - Disclaimer: This a general answer to your legal question. Unless you have a signed engagement letter with me, you should not consider this information to be legal advice.
She may be eligible for the provisional waiver, but a thorough review of her situation is required. Please consult with an immigration attorney who can conduct such a review.
(626) 771-1078 Los Angeles Attorney Theodore Huang, Esq. This is not legal advice. No attorney/client relationship is established. Attorney Huang is licensed in MD; practice limited to federal law.