Divorce - adultery limitation period

I have this moot problem where the alleged act of adultery by the petitioner - husband occurred 1 year prior to the filing of petition. Can the respondent - wife take up this in her written statement ?

Also for desertion are there any cases where the statutory 2 year period was waived ? In the problem when the husband tries to contact the wife, she emails him to "leave her alone" implying she's not interested in continuing the marriage.