Complex sentence: Freud had been the only person to believe her in regard to the situations with'Herr K' and her father and after the analysis, she had chosen to confront her tormentors (her father, his lover and his lover's husband).
Split into simpler sentences: Freud had been the only person to believe her regarding'Herr K' and her father. After the analysis, she chose to confront her tormentors (her father, his lover and his lover's husband).