Speaking to Elle magazine in her first interview since her husband's election in May, the 64-year-old former school teacher also joked about the young leader's age -- 25 years less than her -- and spoke glowingly of their marriage.
Macron's plans to create an official status and job for his wife as first lady have been shelved in the face of a hostile online petition, but Brigitte said she planned to adopt the role informally anyway.
Instead of creating an official first lady position -- which would have needed a change in the law or constitution -- the presidency has instead decided to issue a "transparency charter" that will make clear the funds and staff devoted to Brigitte's activities.
"We'll post my meetings and my commitments on the presidency website, so that the French people know exactly what I'm doing," she said. "What's important is that it is clear."
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Brigitte Macron also spoke about her unusual marriage with Macron, a former pupil in her drama classes at a Catholic high-school in the northern city of Amiens.
"When I read about us, I always have the impression I'm reading someone else's story," she said. "Our story is so simple."
Despite the difficulties their relationship caused -- the mother-of-three divorced her first husband in 2006 -- she said she had no regrets.
"If I hadn't made this choice, I would have missed out on my life," she said.
"The only problem with Emmanuel is that he's younger than me," she added.