The personal identity of everyone is necessarily multifaceted and hybrid, just like the globalized society we live in. In our postmodern era, every individual is submitted to constant flows which promote the multiplicity and the development of a plural self. The social networks, by blurring the frontiers between the real and the virtual, make it possible for individuals to build new identities and to experience hidden aspects of their own personality. I make a comprehensive analysis of a clinical vignette of a patient suffering from an identity trouble and a kind of gender dysphoria as the result of the primary relationship with her mother. I study the very complex psychic construction of the femininity in women, in relationship with motherhood. Thereby, I argue that the gender theory cannot explain the origin, riddled with obstacles, of the sexual identity, because it doesn’t take into account neither the unique history nor the personal body fantasies of each person, whose origins lay in the primary relationship with the mother.