My parents are happily married for over 25 years. My father is a central government employee who is going to retire in a couple of years. Unfortunately he had an illegetimate relationship with a woman who was married to one of his colleagues. This went around for one and a half year until my mother found out about it and it almost took us a year to try and convince our dad to maintain distance from that woman. He realised his mistake and tried to step back from her. But that woman has been calling him alot. He tried to avoid her. Finally she stopped calling him and we were living happily but after atleast 4-5 months my father recently received a call from her husband who claims he knows everything. my father told him he was busy and will talk later.
My father is a good person, who does charity and everything. Yes, he did make a mistake but that woman made a mistake too.
My question is how should my family and my father handle this situation? How should we handle that woman and her husband if they try to contact us or threaten us or my father?
Its a request to please give your suggestions or legal advices regarding how to handle such situation. and please avoid judging my father's character. He made a mistake but he wants to correct that mistake.
thanks