What about the weird moves?

I think I almost got the whole idea of the movie. But there is still something I did not quite catch.

Since the accident, MariaRosa convinced herself that she is Jeanne, for some reason. Then, she grown up with the idea of being Jeanne. Once she has to dig up some memories of her childhood (to write her book), she starts somehow to go crazy because her brain cannot make a logical connection (and explain) between what she knows to be true (her being Jeanne and all her relatives) and the things her brain assumes to be but are not (she's supposed to look like Sophie Marceau but doesn't and so on). So one might say that Monica Bellucci integrated all the elements of her life into Sophie Marceau's life. Monica managed to make everything match, except Sophie's childhood, because this is the only part of Sophie's life that Monica did not experience as Sophie, but only as Monica in Italy. So, because Monica's brain (MariaRosa's brain) cannot gather any information about her childhood as Jeanne, the brain somehow realizes this lack of logic and starts to see things as they really are.

That is why, all of a sudden, furnitures start to move to their real places, people got their real faces, etc. The illusive curtain of her brain starts to collapse. But what is wrong with her husband and kids that start doing weird moves like they were going crazy, at the beginning of the movie???? (she's cooking at that time, and she sees them doing these moves on the camera). This really freaked me out.