Lying to take the oath of citizenship, lying while taking the oath. Lying to take the oath of office. Lying while taking the oath of office. Pinocchia.
She became a citizen before this marriage occurred so she didn't lie about that. Oath of office of office is to defend the Constitution so I don't know how this impacts that either. But helping someone obtain citizenship through fraudulent means is a felony so far as I know. So she could be charged with that and expelled.