Both the White House and the French government are denying the remarks. The French Embassy says Ms Bruni-Sarkozy is distancing herself from the biography.
What's Mick Jagger really like?
It was just earlier this year that the French First Lady and her husband of a couple of years were in the news for each allegedly having affairs. This story too was vehemently denied.
I'm not sure if these stories are spread by media outlets after salacious stories and the facts be damned or by political rivals who would like nothing better than to see the downfall of current government leaders.
Or the stories may be true. After all, living in the White House drove Betty Ford to drink. And we all know where it drove Bill Clinton.
Here in Canada, the pecadilloes of politicians and their wives, if any, are seldom reported. Gosh we'd have to go back to the 70s when Prime Minister Trudeau's wife Margaret flew off to New York to dance the night away at Studio 54 with the Rolling Stones. (Hmm, Mick Jagger, eh? In this regard Carla Bruni may have more in common with Margaret Trudeau than Michelle Obama!)
I'm not saying things like this haven't happened since. Just, if these things have happened, the Canadian political media fails to report it.
And I'm not so sure I mind that. I'm of the view that if it isn't criminal what they do in their private life is their affair...so to speak. But what they do in public life better be above board because the people who voted for them expect it of them.