Sally's husband is the grandfather of ma son .Who am I

Sally's husband is the grandfather of ma son .Who am I Helen's husband is the grandfather of my son .Who am Helen's husband is the grandfather of my son.Who am Peter's son is the D of my son ,am I peter's grandson?Who am john's son is the father of my son .who am i Who is the husband of professor Xuyoucai ? king who's moaning is the son of the king who's fucking and ( )grandfather is the old man?A:Who's BWhose he is my father ,But I am not his son. Who am I?I am his Mr L i is my father but I am noy his son Who am I Mr Zhang is ma father,but I'm not his son .who an I Mr.Wang is my father ,but i am not his son ,Who am I ?