Unfortunately, Cain has the predicament of not being able to answer her accusations chapter and verse because that would pretty much eat up all his time and badly distract from his campaign message. He has vehemently denied the accusation of an 'affair', although there may have been some kind of friendship involved. So what?
I view this as the DNC's attempt to smear Cain by using women he has worked with or known in some way and convincing them to slander him with outrageous lies, probably paying them well for doing so in a way that cannot be traced back to the DNC or Obama campaign. It has definitely damaged his momentum in the primary campaign but I do not believe these smears will stop Cain.
Has she even said it was sexual, all I heard was it was inappropriate, whatever that means.