It is about friendship and betrayal. The men both became wealthy and powerful and the african man thought the white man betrayed him and so he had the man's twin boys killed in their bed while asleep. This was like a short drama series that lasted for two nights in the 80's.

I think what you're looking for is the mini-series MASTER OF THE GAME.based on the book by Sidney Sheldon. But the white man only has one son.
Later on though, there are twin girls (his great grand-daughters.(one of them is evil)