"All these ladies want your dick but one of them is your sister that I fathered and left a long time ago and I ain't gonna tell you who that is, good luck."
It would probably be difficult for the international children to get child support from him, but the children in the United States definitely could.
I feel bad for his wife. He's putting their whole family at risk, by continuing to have children with strangers. It's all fun and games now, but it will suck when he dies and 100 children lay claim to his assets.