Excellent point. I've suspected this is a phony story floated by Hillary herself as a deliberate distraction, and your observation certainly would be a motive.
I've thought about that possibility, but I don't think so -- if the Klintoon camp wanted to get this 'news' out there themselves to defuse it early, I think they would have waited until immediately after she had secured the Dim nomination.
It would be reckless for them to time the release of that information at this point in the Primary when she is already having some difficulties with Obama rising in the polls.
The Klintoon machine is very calculating but definitely not reckless.