1. Well, if it is found that she participated in divorce proceeding in USA then the decree of divorce is binding on her. Moreover the ground of ' irretrievable breaking down of marriage' is also a ground for divorce is India. Hence the decree of divorce granted in USA can not be disputed in India.
2. Now since some criminal cases has been filed against you, you can challenge its legality by way of filing of quashing petition in high court on the ground of non existence of marriage at the time of 498A case.
3. However the DV case can not be quashed on the ground of divorce since it can be filed even after divorce is granted.
4. So engage an advocate fight the cases on the line if advice as sated above.