Reborn, I Became My Ex's Mother-in-Law

After supporting her fiancé Lucien for ten years, Selene is betrayed when he abandons her for the empire's only princess, who massacres her family on their wedding day. Reborn at the moment of their broken engagement, Selene binds to the Fertility System for the Tyrant, saves the childless Emperor, and bears his long-awaited heir. When the princess attacks again, the Emperor shields Selene and declares, "Show your Mother some respect!"