He lives in my nieghbourhood with his wife. This couple had 2 or 3 children - i seem to forget the number. All their children were male.
Mr.X and his wife prefer to hire domestic help to do cooking/cleaning/washing etc.
Every time a maid is hired in their house, Mr.X rapes her. She then leaves. A new maid is hired. Mr.X rapes her. The cycle repeats itself.
When Mr.X's sons were old enough to get married, their mother insisted that they set up independent homes with their wives. None of Mr.X's children stay with him any longer.
His wife knew about his habit. Who knows, may be she has even beeen raped by him herself.
By insisting that her sons set up independent homes with their wives, Mr.X's wife has ensured that her daughters-in-law remain safe.