What is the Punishemnt for committing an adultery by a husband to his wife.

I got married in 2015 .It was a love marriage between us but we planned to set everything like an arranged marriage. I got 2 kids.Due to my anger and frustration on my wife i committed myself to indulge in a sexual affair with my office staff and my staff is not married .the affair was from nov 2017.At presently my wife caught me having sex with my affair in my office .She has got the recording of my sex video from my office camera.Without realizing the future consequences for heating on my wife i have done this adultery. I have admitted whole heartedly my mistakes and pleading for repentance and asking my wife to accept me .I have also promised that i will not be in contact with my office staff anymore in future or do such kind of activities.But she is not ready to accept me. All my family members are ready to forgive me but my wife alone is not forgiving mr. My office staff said mutually she will not come back in my life and disturb or claim any life with me.she also feels guilty for spoiling my life with my wife. I am mentally disturbed and im not able to convince my wife. What is the legal opinion possible from here.