Who are sisters to philomelas?

Philomela's sisters are Procne and Tereus. In Greek mythology, they are involved in a tragic tale of betrayal and vengeance, where Procne's husband Tereus assaults Philomela and silences her by mutilating her. The sisters ultimately seek revenge against Tereus, leading to a gruesome act of retribution. Their story is a powerful exploration of themes like trauma, agency, and the bonds of sisterhood.