at the most she might go for agreement of divorce(putting it on the stamp paper),
though such agreement can not be equivated to divorce decree, it can serve as agreement to divorce, which will offer 2 benefits
1) shielding husband against wife's alligations, if any
2) helpful in future in case if divorce is filed by husband in court on the ground of desertion / cruelty
so there is no harm in preparing such document.