A brother and sister raised under the same roof. The brother, who had thought his sister was innocent, finds out that she has been selling her body. Driven by jealousy and anger, he confusesly assaults his sister. The brother lustfully gropes his sister's large breasts, round buttocks, and undeveloped genitals, while the sister awakens to the pleasure of masochism. Thus, the siblings develop a twisted relationship as they revel in the taboo of impregnation and internal ejaculation.
