Valerie's choice (spoilers)
I've read the reviews posted for the film as there's little to read on the film's board. Most seem to suggest that her decision to end the relationship with Remi makes her happy. I'm not sure that it did.
At the beginning of the film she and Remi argue over his unemployment, money and the fact she is pregnant. She goes to work and meets one particularly embittered employee who tells Valerie that she seems happy. The same employee Valerie later describes to Remi as being stuck in a relationship with another simply for fear of being abandoned. Shortly after sharing that she decides to break up with him and they argue some more about this decision. By the end of the film she is single and alone and discussing being alone with her mother, who, we learn, acted similarly towards Valerie's father, Pierre, after their daughter's birth. Like mother, like daughter.
The concluding conversation with her mother suggested to me that Valerie acted from fear of being stuck in a loveless relationship with Remi for fear of being abandoned. So rather than live that way, which Remi rightly argues is overly determined, she decides to end the relationship just because she can. She plays out something that her mother, who was dismissive of Valerie's father, went through and has just continued a family pattern of behaviour.
An hour isn't an hour but a little bit of eternity in our handsshare