Have we heard from her since? No?
Is there any evidence for any of the allegations? This is all hearsay.
Cain quit his campaign. He certainly appears to have thought something was there, or his wife did or he would not have quit. In fact a month earlier he was boasting that he wouldn't quit over these,
He couldn't deny paying off that woman if she has physical proof, that one is much easier to prove he paid like copies of checks. That is what triggered his quitting especially when his wife didn't know he was doing it.