Have you talked to him about a paternity test? It might be worth running inception game - ie. make him think it was his idea - on your friend about it if you think he might get offended by the suggestion.
Is he aware of how much a divorce could cost him? Does he have a pre-nup and can you suggest that to him?
Is he aware of how much a divorce could cost him? Does he have a pre-nup and can you suggest that to him?