My Ex's Sister Is Mine

Viola catches boyfriend Julian cheating with Sebastian at a manor ball. She fakes amnesia, gets close to his sister Livia, who protects her from acid. As the world's richest heiress, Viola punishes the cheaters—one jailed, the other paralyzed. Livia finds a recording proving Viola's act, tries to leave, but Viola holds her. They unite and take control together.