Domain (2009)

Pierre, a teenage boy is fascinated with his brilliant mathematician and vaguely bohemian aunt, Nadia who is in her forties. Their rapport is friendly, ambiguous, bordering on amorous. He becomes drawn to her and her friends, as he also explores his sexuality with an older man in his 20s. Tensions build throughout the film surrounding her alcoholism and his own unwillingness to confront it head on, as well as Samir, a mysterious much older male acquaintance of Nadia's who seems to have some sinister place in her life and who frequently seems to flirt with her nephew, clearly upsetting her. A crisis leads to her being admitted to a rehab clinic, which her nephew visits to try and maintain their deep connection and help her deal with the confining and frustrating nature of clinical life.