First of all, you need to remember that many african tribes practiced polygamy. As does islam, to which Onyango Obama belonged; remember Gloria Hagberg telling how ‘the old man’ used to read the koran by the light of a candle?
Even today, Malik has a large number of wives and a whole herd of little children.
Yes of course, sauce for the goose isn’t the sauce for the gander.
He certainly wasn’t being a responsible husband in any sense of the word to Kezia. Or Ruth for that matter.