You can choose to rationalize away the significance of such. I don't. I doubt one woman in 100 would accept their husband hiding such support to another woman from them, no matter what the underlying motive. All it would take is Cain telling her that it was happening. And Cain didn't say such.
If I tried to pull that stunt with any of the women I was thinking of marrying, you'd be hearing gunshots. This ain't France (except on this thread).