Have you really known your father or mother?What if one of them has a lover?

I understand your views towards this kind of family problem,just like me I will also leave whoever might that person.I have to gather first all the collected evidence because they would surely deny what was going on the family,just to hide their real guilt,they have to make a probable story more believing than the real story,so the face the problem squarely,by letting all concern to see and concludes what I have submitted are the real truth or they would accept a lie.