the movie is about
specially for the twins ,who were born together,grew up together,till some ages, ate,drunk,had a bath together.
people calling it as incest but there is no incest in this movie,Theo and Isabelle does not just want to be a part,they don't want to grow up,they don't want to have different identity.
they slepp together,they stay naked in the house because they see themselves as innocent as they were baby.