The mother of the two daughters, who since has estranged herself from the rest of the family, was also sentenced to four years in prison for not informing police at the time.
Now aged 29 and 31, the two daughters have always supported their father and say all sexual relations were consensual.
One of the daughters still lives with her father, and they have a child together.
According to the mother’s lawyer, Florence Danne-Thiefine, the girls “fully admit today to their consent and love for their father.”
According to the lawyer defending the father, Hubert Delarue, the sexual relations started when the girls were teenagers, when they were over 15.
The girls originally filed just a civil case against their father so they “would be able to help with the case, so that no one prevented them from telling the truth,” according to Danne-Thiefine.
But one of the girls’ honest testimonies about her father triggered and inquest.
The mother and father, who have three other children, also lost the parental rights to one of their children, who is a minor.
Due to the time the mother and father spent in prison during investigations leading up to the case, they have technically already served the terms given.
But both will be on parole for 10 years and will face a further seven year sentence if the terms of the parole are broken.