Using the individual psychotherapeutic treatment of a thirteen year-old patient, Clementine<i></i>, we will explore the possible repercussions of a sisterly bond that is too strong, and how it may sometimes prove a hindrance to the separation/individuation process. Carried to an extreme in the fantasy of twinship, it leads to an Ego with vague contours, and the pursuit of a relation that may be harmful to a subject with fragile narcissism. There is lack of differentiation between bodies and psyches. Anorexia will burst this specular bubble when only one of the subjects reaches physiological puberty. Clinical interviews in the space for physical and psychic separation the hospital setting provides shed light on the issues and the limits of the establishment of subjectivation work.

Adolescence, T. 31 n°1, pp. 27-36.