I don't know if that is "logical" but I am inclined to think that there is a possibility he has gotten someone pregnant. And that they got an abortion. Not all women will admit they got pregnant, and he has the money and legal means to keep them quiet.
But, wouldn't you think someone would come forward? They could get a lot of money to say something. Unless he also has ensured that in the agreement (which he paid them to sign) any money they make from coming forward he would get. Some may be dead by now. 
So, why haven't any come forward? What a story that would be. And more mental gyrations about how this never happened or that he is repentant.