There is NO proof of this accusation, and there is a complete, utter denial from Cain.
Assuming that the accusation is accurate, knowing the threat that a black conservative is to Obama, and how the left has treated black conservatives in the past, is just plain stupid.
He's not denying she's a "friend" though, or that his wife didn't know about her, or that he was helping her financially...so somethings amiss...time will surely reveal though but in this case I'm not so sure Cain's going to be able to slide thru.