I Am My Sister! (2008)

Ever since Marie-Hélène fell into a deep coma eight long years ago, her son Julien has given all his time and energy to running the family business that no one else wanted to take over. So when Marie-Hélène wakes up in top form, Julien glimpses the chance of getting his life back. But that's forgetting that his mother is totally unbearable. Showing no interest in Julien's problems, she demands to see her wonderful daughter Lucie, who is unreachable. Julien can see only one way to stop his mother relapsing, and maybe sell the company and get himself a new life at the same time: by becoming Lucie.