Let's say your aunt got deported by the U.S government. Few weeks later, she came back, as the gov't has nullified the deportation rules because your aunt gave birth in the U.S.A (more like mandatory child support). The correct phrase & preposition is:
My auny was deported, but few weeks later, the U.S. government found out that she gave birth to her youngest child in the U.S.A, then the government has nullified/amend the deportation rule on/to/for her, so she came back.
What is the correct phrase and preposition here?