After Rebirth, I Backed My Brother-in-Law's Rise to Power (Novel)

In her past life, she was a kingdom-ruining empress—and he, her youngest lover, was the man who killed her. Reborn as a farmer’s widowed wife, she finds the future Grand Tutor standing quietly at her bedside, calling her “Sister-in-law.” Perfect. Their battle was never settled; this life, they would simply continue under new identities. But when he rises to power, he asks for only one reward: “All I desire is Sister-in-law’s affection.”