In this environment of mass deportation and a legislature disincline to grant any leeway to undocumented persons, it is not advisable for your friend to leave the country, if she wishes to return to the US. A genuine marriage might resolve at least a part of her documentation problem. However, speak to an immigration law attorney for solid advice about your situation. You should re-post this question under Immigration Law.
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Not in the USA. We do not have humanitarian petitions. We have a humanitarian parole petition, but it would be an uphill battle to get it under these facts.
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Unfortunately not in the present harsh anti illegal immigration and zero tolerance policy, nor under the facts you have presented. Sorry.
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