"I was 14 and I let it go (...). I was 14, I knew and didn't say anything."
"My stepfather would come into my brother's room. I could hear his footsteps in the hallway and knew he was joining him. In this silence, I imagined things. That he was asking my brother to stroke him maybe, to suck him.
"I was waiting. I was waiting for him to come out of the room, full of unfamiliar and immediately despised smells," the book's author, 45-year old lawyer Camille Kouchner, wrote. "By not naming what was happening, I participated in the incest."
More than a month after its publication, Kouchner's book, "La familia grande," continues to rock France.
In it, Kouchner accuses her step-father, leading French intellectual Olivier Duhamel, of abusing her twin brother starting when he was 14.
The twins are the children of former French Foreign Minister Bernard Kouchner.
Their step-father, Duhamel, is a Socialist former member of the European Parliament and a renowned political pundit who also headed the governing board of Sciences Po, one of France's leading universities.
"Being subjected to personal attacks, and in an attempt to preserve the institutions in which I work, I terminate my functions," Duhamel wrote on Twitter on January 4, shortly after the accusations surfaced. The tweet coincided with his quitting the governing board of Sciences Po as well as leaving roles in an intellectual club and a political science publication.
Duhamel has since deleted the tweet and his Twitter account.
On January 5, the Paris Prosecutor's office announced it was opening an investigation into Duhamel for "rape and sexual assault by a person having authority over a 15-year-old minor," despite the statute of limitations having run out.
CNN has reached out to Duhamel's attorney for comments but has not received a reply. The political scientist has not publicly spoken since his resignation.
Duhamel's stepson -- Camille's Kouchner's twin brother -- also filed a complaint against Duhamel last month, according to a statement by his lawyer Jacqueline Laffont obtained by CNN and initially sent to AFP news agency.
"In the context of the 'Duhamel case', the alleged victim informed the AFP, through his lawyer, Jacqueline Laffont, that he had filed a complaint against his ex-stepfather, Mr. Olivier Duhamel following the opening of a preliminary investigation by the Paris prosecutor's office," the statement read.
Top university shaken
The repercussions of the Duhamel case are being felt far beyond his family circle.
Sciences Po director Frederic Mion resigned on Tuesday in a letter to professors and students that was published on the university's website.
The university is one of France's most elite schools, having produced five French prime ministers and five French presidents including current leader Emmanuel Macron.
For the past month, Mion was under pressure to resign from student groups after acknowledging he was made aware of the allegations against Duhamel as early as 2018.
In his resignation letter, Mion referred to an Education Ministry report on his handling of the case, conceding that he committed "an error of judgment in dealing with the allegations that were communicated to me in 2018 as well as inconsistencies in the way I have expressed myself on this case after it broke."
In a statement released on January 7, Mion reacted to an article published in Le Monde newspaper the day before claiming that he knew of the allegations despite initially denying them.
"With neither tangible evidence nor any further or precise knowledge of the situation, I had difficulty believing that the rumors could be founded," Mion wrote in the statement. He said that discovering through press reports the extent of Duhamel's alleged actions was "a shock to me personally."
But on Wednesday, in an email to CNN, former Culture Minister Au